Version 2.6.2

This change introduces the `fixDirectoryLimit` amendment to remove the directory pages limit. We found that the directory size limit is easier to hit than originally assumed, and there is no good reason to keep this limit, since the object reserve provides the necessary incentive to avoid creating unnecessary objects on the ledger.

.github/workflows/libxrpl.yml

@@ -1,91 +0,0 @@
-name: Check libXRPL compatibility with Clio
-env:
-  CONAN_REMOTE_URL: https://conan.ripplex.io
-  CONAN_LOGIN_USERNAME_XRPLF: ${{ secrets.CONAN_REMOTE_USERNAME }}
-  CONAN_PASSWORD_XRPLF: ${{ secrets.CONAN_REMOTE_PASSWORD }}
-on:
-  pull_request:
-    paths:
-      - "src/libxrpl/protocol/BuildInfo.cpp"
-      - ".github/workflows/libxrpl.yml"
-    types: [opened, reopened, synchronize, ready_for_review]
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  publish:
-    if: ${{ github.event_name == 'push' || github.event.pull_request.draft != true || contains(github.event.pull_request.labels.*.name, 'DraftRunCI') }}
-    name: Publish libXRPL
-    outputs:
-      outcome: ${{ steps.upload.outputs.outcome }}
-      version: ${{ steps.version.outputs.version }}
-      channel: ${{ steps.channel.outputs.channel }}
-    runs-on: [self-hosted, heavy]
-    container: ghcr.io/xrplf/rippled-build-ubuntu:aaf5e3e
-    steps:
-      - name: Wait for essential checks to succeed
-        uses: lewagon/wait-on-check-action@v1.3.4
-        with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
-          running-workflow-name: wait-for-check-regexp
-          check-regexp: "(dependencies|test).*linux.*" # Ignore windows and mac tests but make sure linux passes
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-          wait-interval: 10
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Generate channel
-        id: channel
-        shell: bash
-        run: |
-          echo channel="clio/pr_${{ github.event.pull_request.number }}" | tee ${GITHUB_OUTPUT}
-      - name: Export new package
-        shell: bash
-        run: |
-          conan export . ${{ steps.channel.outputs.channel }}
-      - name: Add Conan remote
-        shell: bash
-        run: |
-          echo "Adding Conan remote 'xrplf' at ${{ env.CONAN_REMOTE_URL }}."
-          conan remote add xrplf ${{ env.CONAN_REMOTE_URL }} --insert 0 --force 
-          echo "Listing Conan remotes."
-          conan remote list
-      - name: Parse new version
-        id: version
-        shell: bash
-        run: |
-          echo version="$(cat src/libxrpl/protocol/BuildInfo.cpp | grep "versionString =" \
-            | awk -F '"' '{print $2}')" | tee ${GITHUB_OUTPUT}
-      - name: Try to authenticate to Conan remote
-        id: remote
-        shell: bash
-        run: |
-          # `conan user` implicitly uses the environment variables CONAN_LOGIN_USERNAME_<REMOTE> and CONAN_PASSWORD_<REMOTE>.
-          # https://docs.conan.io/1/reference/commands/misc/user.html#using-environment-variables
-          # https://docs.conan.io/1/reference/env_vars.html#conan-login-username-conan-login-username-remote-name
-          # https://docs.conan.io/1/reference/env_vars.html#conan-password-conan-password-remote-name
-          echo outcome=$(conan user --remote xrplf --password >&2 \
-            && echo success || echo failure) | tee ${GITHUB_OUTPUT}
-      - name: Upload new package
-        id: upload
-        if: (steps.remote.outputs.outcome == 'success')
-        shell: bash
-        run: |
-          echo "conan upload version ${{ steps.version.outputs.version }} on channel ${{ steps.channel.outputs.channel }}"
-          echo outcome=$(conan upload xrpl/${{ steps.version.outputs.version }}@${{ steps.channel.outputs.channel }} --remote ripple --confirm >&2 \
-            && echo success || echo failure) | tee ${GITHUB_OUTPUT}
-  notify_clio:
-    name: Notify Clio
-    runs-on: ubuntu-latest
-    needs: publish
-    env:
-      GH_TOKEN: ${{ secrets.CLIO_NOTIFY_TOKEN }}
-    steps:
-      - name: Notify Clio about new version
-        if: (needs.publish.outputs.outcome == 'success')
-        shell: bash
-        run: |
-          gh api --method POST -H "Accept: application/vnd.github+json" -H "X-GitHub-Api-Version: 2022-11-28" \
-          /repos/xrplf/clio/dispatches -f "event_type=check_libxrpl" \
-          -F "client_payload[version]=${{ needs.publish.outputs.version }}@${{ needs.publish.outputs.channel }}" \
-          -F "client_payload[pr]=${{ github.event.pull_request.number }}"

.github/workflows/macos.yml

@@ -50,30 +50,35 @@ jobs:
     steps:
       - name: checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
-      - name: install Conan
+      - name: Delete old build tools installed using Homebrew
         run: |
-          brew install conan
+          brew uninstall --force \
-      - name: install Ninja
+          cmake \
-        if: matrix.generator == 'Ninja'
+          conan
-        run: brew install ninja
+
-      - name: install python
+      - name: Install build tools using Homebrew
         run: |
-          if which python > /dev/null 2>&1; then
+          brew install --quiet \
-              echo "Python executable exists"
+          ca-certificates \
-          else
+          ninja \
-              brew install python@3.13
+          python@3.14
-              ln -s /opt/homebrew/bin/python3 /opt/homebrew/bin/python
+
-          fi
+      - name: Remove old fmt using Homebrew
-      - name: install cmake
         run: |
-          if which cmake > /dev/null 2>&1; then
+          brew unlink fmt
-              echo "cmake executable exists"
+          brew cleanup
-          else
+          brew link fmt
-              brew install cmake
+
-          fi
+      - name: List software installed using Homebrew
-      - name: install nproc
+        run: brew list --version
+
+      - name: Install build tools using pip
+        shell: bash
         run: |
-          brew install coreutils
+          pip3 install --break-system-packages --upgrade pip
+          pip3 install --break-system-packages \
+          cmake==4.1.2 \
+          conan==2.22.1
       - name: check environment
         run: |
           env | sort

conan/profiles/default

@@ -26,6 +26,9 @@ tools.build:cxxflags=['-Wno-missing-template-arg-list-after-template-kw']
 {% if compiler == "apple-clang" and compiler_version >= 17 %}
 tools.build:cxxflags=['-Wno-missing-template-arg-list-after-template-kw']
 {% endif %}
+{% if compiler == "clang" and compiler_version == 16 %}
+tools.build:cxxflags=['-DBOOST_ASIO_DISABLE_CONCEPTS']
+{% endif %}
 {% if compiler == "gcc" and compiler_version < 13 %}
 tools.build:cxxflags=['-Wno-restrict']
 {% endif %}

conanfile.py

@@ -104,7 +104,7 @@ class Xrpl(ConanFile):
     def requirements(self):
         # Conan 2 requires transitive headers to be specified
         transitive_headers_opt = {'transitive_headers': True} if conan_version.split('.')[0] == '2' else {}
-        self.requires('boost/1.86.0', force=True, **transitive_headers_opt)
+        self.requires('boost/1.83.0', force=True, **transitive_headers_opt)
         self.requires('date/3.0.4', **transitive_headers_opt)
         self.requires('lz4/1.10.0', force=True)
         self.requires('protobuf/3.21.12', force=True)

include/xrpl/basics/SHAMapHash.h

@@ -21,6 +21,7 @@
 #define RIPPLE_BASICS_SHAMAP_HASH_H_INCLUDED
 
 #include <xrpl/basics/base_uint.h>
+#include <xrpl/basics/partitioned_unordered_map.h>
 
 #include <ostream>
 

include/xrpl/basics/TaggedCache.h

@@ -90,6 +90,9 @@ public:
     int
     getCacheSize() const;
 
+    int
+    getTrackSize() const;
+
     float
     getHitRate();
 
@@ -167,6 +170,9 @@ public:
     bool
     retrieve(key_type const& key, T& data);
 
+    mutex_type&
+    peekMutex();
+
     std::vector<key_type>
     getKeys() const;
 
@@ -187,14 +193,11 @@ public:
 
 private:
     SharedPointerType
-    initialFetch(key_type const& key);
+    initialFetch(key_type const& key, std::lock_guard<mutex_type> const& l);
 
     void
     collect_metrics();
 
-    Mutex&
-    lockPartition(key_type const& key) const;
-
 private:
     struct Stats
     {
@@ -297,8 +300,8 @@ private:
         [[maybe_unused]] clock_type::time_point const& now,
         typename KeyValueCacheType::map_type& partition,
         SweptPointersVector& stuffToSweep,
-        std::atomic<int>& allRemoval,
+        std::atomic<int>& allRemovals,
-        Mutex& partitionLock);
+        std::lock_guard<std::recursive_mutex> const&);
 
     [[nodiscard]] std::thread
     sweepHelper(
@@ -307,12 +310,14 @@ private:
         typename KeyOnlyCacheType::map_type& partition,
         SweptPointersVector&,
         std::atomic<int>& allRemovals,
-        Mutex& partitionLock);
+        std::lock_guard<std::recursive_mutex> const&);
 
     beast::Journal m_journal;
     clock_type& m_clock;
     Stats m_stats;
 
+    mutex_type mutable m_mutex;
+
     // Used for logging
     std::string m_name;
 
@@ -323,11 +328,10 @@ private:
     clock_type::duration const m_target_age;
 
     // Number of items cached
-    std::atomic<int> m_cache_count;
+    int m_cache_count;
     cache_type m_cache;  // Hold strong reference to recent objects
-    std::atomic<std::uint64_t> m_hits;
+    std::uint64_t m_hits;
-    std::atomic<std::uint64_t> m_misses;
+    std::uint64_t m_misses;
-    mutable std::vector<mutex_type> partitionLocks_;
 };
 
 }  // namespace ripple

include/xrpl/basics/TaggedCache.ipp

@@ -22,7 +22,6 @@
 
 #include <xrpl/basics/IntrusivePointer.ipp>
 #include <xrpl/basics/TaggedCache.h>
-#include <xrpl/beast/core/CurrentThreadName.h>
 
 namespace ripple {
 
@@ -61,7 +60,6 @@ inline TaggedCache<
     , m_hits(0)
     , m_misses(0)
 {
-    partitionLocks_ = std::vector<mutex_type>(m_cache.partitions());
 }
 
 template <
@@ -107,13 +105,8 @@ TaggedCache<
     KeyEqual,
     Mutex>::size() const
 {
-    std::size_t totalSize = 0;
+    std::lock_guard lock(m_mutex);
-    for (size_t i = 0; i < partitionLocks_.size(); ++i)
+    return m_cache.size();
-    {
-        std::lock_guard<Mutex> lock(partitionLocks_[i]);
-        totalSize += m_cache.map()[i].size();
-    }
-    return totalSize;
 }
 
 template <
@@ -136,7 +129,32 @@ TaggedCache<
     KeyEqual,
     Mutex>::getCacheSize() const
 {
-    return m_cache_count.load(std::memory_order_relaxed);
+    std::lock_guard lock(m_mutex);
+    return m_cache_count;
+}
+
+template <
+    class Key,
+    class T,
+    bool IsKeyCache,
+    class SharedWeakUnionPointer,
+    class SharedPointerType,
+    class Hash,
+    class KeyEqual,
+    class Mutex>
+inline int
+TaggedCache<
+    Key,
+    T,
+    IsKeyCache,
+    SharedWeakUnionPointer,
+    SharedPointerType,
+    Hash,
+    KeyEqual,
+    Mutex>::getTrackSize() const
+{
+    std::lock_guard lock(m_mutex);
+    return m_cache.size();
 }
 
 template <
@@ -159,10 +177,9 @@ TaggedCache<
     KeyEqual,
     Mutex>::getHitRate()
 {
-    auto const hits = m_hits.load(std::memory_order_relaxed);
+    std::lock_guard lock(m_mutex);
-    auto const misses = m_misses.load(std::memory_order_relaxed);
+    auto const total = static_cast<float>(m_hits + m_misses);
-    float const total = float(hits + misses);
+    return m_hits * (100.0f / std::max(1.0f, total));
-    return hits * (100.0f / std::max(1.0f, total));
 }
 
 template <
@@ -185,12 +202,9 @@ TaggedCache<
     KeyEqual,
     Mutex>::clear()
 {
-    for (auto& mutex : partitionLocks_)
+    std::lock_guard lock(m_mutex);
-        mutex.lock();
     m_cache.clear();
-    for (auto& mutex : partitionLocks_)
+    m_cache_count = 0;
-        mutex.unlock();
-    m_cache_count.store(0, std::memory_order_relaxed);
 }
 
 template <
@@ -213,9 +227,11 @@ TaggedCache<
     KeyEqual,
     Mutex>::reset()
 {
-    clear();
+    std::lock_guard lock(m_mutex);
-    m_hits.store(0, std::memory_order_relaxed);
+    m_cache.clear();
-    m_misses.store(0, std::memory_order_relaxed);
+    m_cache_count = 0;
+    m_hits = 0;
+    m_misses = 0;
 }
 
 template <
@@ -239,7 +255,7 @@ TaggedCache<
     KeyEqual,
     Mutex>::touch_if_exists(KeyComparable const& key)
 {
-    std::lock_guard<Mutex> lock(lockPartition(key));
+    std::lock_guard lock(m_mutex);
     auto const iter(m_cache.find(key));
     if (iter == m_cache.end())
     {
@@ -281,6 +297,8 @@ TaggedCache<
 
     auto const start = std::chrono::steady_clock::now();
     {
+        std::lock_guard lock(m_mutex);
+
         if (m_target_size == 0 ||
             (static_cast<int>(m_cache.size()) <= m_target_size))
         {
@@ -312,13 +330,12 @@ TaggedCache<
                 m_cache.map()[p],
                 allStuffToSweep[p],
                 allRemovals,
-                partitionLocks_[p]));
+                lock));
         }
         for (std::thread& worker : workers)
             worker.join();
 
-        int removals = allRemovals.load(std::memory_order_relaxed);
+        m_cache_count -= allRemovals;
-        m_cache_count.fetch_sub(removals, std::memory_order_relaxed);
     }
     // At this point allStuffToSweep will go out of scope outside the lock
     // and decrement the reference count on each strong pointer.
@@ -352,8 +369,7 @@ TaggedCache<
 {
     // Remove from cache, if !valid, remove from map too. Returns true if
     // removed from cache
-
+    std::lock_guard lock(m_mutex);
-    std::lock_guard<Mutex> lock(lockPartition(key));
 
     auto cit = m_cache.find(key);
 
@@ -366,7 +382,7 @@ TaggedCache<
 
     if (entry.isCached())
     {
-        m_cache_count.fetch_sub(1, std::memory_order_relaxed);
+        --m_cache_count;
         entry.ptr.convertToWeak();
         ret = true;
     }
@@ -404,16 +420,17 @@ TaggedCache<
 {
     // Return canonical value, store if needed, refresh in cache
     // Return values: true=we had the data already
+    std::lock_guard lock(m_mutex);
 
-    std::lock_guard<Mutex> lock(lockPartition(key));
     auto cit = m_cache.find(key);
+
     if (cit == m_cache.end())
     {
         m_cache.emplace(
             std::piecewise_construct,
             std::forward_as_tuple(key),
             std::forward_as_tuple(m_clock.now(), data));
-        m_cache_count.fetch_add(1, std::memory_order_relaxed);
+        ++m_cache_count;
         return false;
     }
 
@@ -462,12 +479,12 @@ TaggedCache<
             data = cachedData;
         }
 
-        m_cache_count.fetch_add(1, std::memory_order_relaxed);
+        ++m_cache_count;
         return true;
     }
 
     entry.ptr = data;
-    m_cache_count.fetch_add(1, std::memory_order_relaxed);
+    ++m_cache_count;
 
     return false;
 }
@@ -543,11 +560,10 @@ TaggedCache<
     KeyEqual,
     Mutex>::fetch(key_type const& key)
 {
-    std::lock_guard<Mutex> lock(lockPartition(key));
+    std::lock_guard<mutex_type> l(m_mutex);
-
+    auto ret = initialFetch(key, l);
-    auto ret = initialFetch(key);
     if (!ret)
-        m_misses.fetch_add(1, std::memory_order_relaxed);
+        ++m_misses;
     return ret;
 }
 
@@ -611,8 +627,8 @@ TaggedCache<
     Mutex>::insert(key_type const& key)
     -> std::enable_if_t<IsKeyCache, ReturnType>
 {
+    std::lock_guard lock(m_mutex);
     clock_type::time_point const now(m_clock.now());
-    std::lock_guard<Mutex> lock(lockPartition(key));
     auto [it, inserted] = m_cache.emplace(
         std::piecewise_construct,
         std::forward_as_tuple(key),
@@ -652,6 +668,29 @@ TaggedCache<
     return true;
 }
 
+template <
+    class Key,
+    class T,
+    bool IsKeyCache,
+    class SharedWeakUnionPointer,
+    class SharedPointerType,
+    class Hash,
+    class KeyEqual,
+    class Mutex>
+inline auto
+TaggedCache<
+    Key,
+    T,
+    IsKeyCache,
+    SharedWeakUnionPointer,
+    SharedPointerType,
+    Hash,
+    KeyEqual,
+    Mutex>::peekMutex() -> mutex_type&
+{
+    return m_mutex;
+}
+
 template <
     class Key,
     class T,
@@ -675,13 +714,10 @@ TaggedCache<
     std::vector<key_type> v;
 
     {
+        std::lock_guard lock(m_mutex);
         v.reserve(m_cache.size());
-        for (std::size_t i = 0; i < partitionLocks_.size(); ++i)
+        for (auto const& _ : m_cache)
-        {
+            v.push_back(_.first);
-            std::lock_guard<Mutex> lock(partitionLocks_[i]);
-            for (auto const& entry : m_cache.map()[i])
-                v.push_back(entry.first);
-        }
     }
 
     return v;
@@ -707,12 +743,11 @@ TaggedCache<
     KeyEqual,
     Mutex>::rate() const
 {
-    auto const hits = m_hits.load(std::memory_order_relaxed);
+    std::lock_guard lock(m_mutex);
-    auto const misses = m_misses.load(std::memory_order_relaxed);
+    auto const tot = m_hits + m_misses;
-    auto const tot = hits + misses;
     if (tot == 0)
-        return 0.0;
+        return 0;
-    return double(hits) / tot;
+    return double(m_hits) / tot;
 }
 
 template <
@@ -736,16 +771,18 @@ TaggedCache<
     KeyEqual,
     Mutex>::fetch(key_type const& digest, Handler const& h)
 {
-    std::lock_guard<Mutex> lock(lockPartition(digest));
+    {
-
+        std::lock_guard l(m_mutex);
-    if (auto ret = initialFetch(digest))
+        if (auto ret = initialFetch(digest, l))
             return ret;
+    }
 
     auto sle = h();
     if (!sle)
         return {};
 
-    m_misses.fetch_add(1, std::memory_order_relaxed);
+    std::lock_guard l(m_mutex);
+    ++m_misses;
     auto const [it, inserted] =
         m_cache.emplace(digest, Entry(m_clock.now(), std::move(sle)));
     if (!inserted)
@@ -772,10 +809,9 @@ TaggedCache<
     SharedPointerType,
     Hash,
     KeyEqual,
-    Mutex>::initialFetch(key_type const& key)
+    Mutex>::
+    initialFetch(key_type const& key, std::lock_guard<mutex_type> const& l)
 {
-    std::lock_guard<Mutex> lock(lockPartition(key));
-
     auto cit = m_cache.find(key);
     if (cit == m_cache.end())
         return {};
@@ -783,7 +819,7 @@ TaggedCache<
     Entry& entry = cit->second;
     if (entry.isCached())
     {
-        m_hits.fetch_add(1, std::memory_order_relaxed);
+        ++m_hits;
         entry.touch(m_clock.now());
         return entry.ptr.getStrong();
     }
@@ -791,13 +827,12 @@ TaggedCache<
     if (entry.isCached())
     {
         // independent of cache size, so not counted as a hit
-        m_cache_count.fetch_add(1, std::memory_order_relaxed);
+        ++m_cache_count;
         entry.touch(m_clock.now());
         return entry.ptr.getStrong();
     }
 
     m_cache.erase(cit);
-
     return {};
 }
 
@@ -826,11 +861,10 @@ TaggedCache<
     {
         beast::insight::Gauge::value_type hit_rate(0);
         {
-            auto const hits = m_hits.load(std::memory_order_relaxed);
+            std::lock_guard lock(m_mutex);
-            auto const misses = m_misses.load(std::memory_order_relaxed);
+            auto const total(m_hits + m_misses);
-            auto const total = hits + misses;
             if (total != 0)
-                hit_rate = (hits * 100) / total;
+                hit_rate = (m_hits * 100) / total;
         }
         m_stats.hit_rate.set(hit_rate);
     }
@@ -861,16 +895,12 @@ TaggedCache<
         typename KeyValueCacheType::map_type& partition,
         SweptPointersVector& stuffToSweep,
         std::atomic<int>& allRemovals,
-        Mutex& partitionLock)
+        std::lock_guard<std::recursive_mutex> const&)
 {
     return std::thread([&, this]() {
-        beast::setCurrentThreadName("sweep-KVCache");
-
         int cacheRemovals = 0;
         int mapRemovals = 0;
 
-        std::lock_guard<Mutex> lock(partitionLock);
-
         // Keep references to all the stuff we sweep
         // so that we can destroy them outside the lock.
         stuffToSweep.reserve(partition.size());
@@ -954,16 +984,12 @@ TaggedCache<
         typename KeyOnlyCacheType::map_type& partition,
         SweptPointersVector&,
         std::atomic<int>& allRemovals,
-        Mutex& partitionLock)
+        std::lock_guard<std::recursive_mutex> const&)
 {
     return std::thread([&, this]() {
-        beast::setCurrentThreadName("sweep-KCache");
-
         int cacheRemovals = 0;
         int mapRemovals = 0;
 
-        std::lock_guard<Mutex> lock(partitionLock);
-
         // Keep references to all the stuff we sweep
         // so that we can destroy them outside the lock.
         {
@@ -998,29 +1024,6 @@ TaggedCache<
     });
 }
 
-template <
-    class Key,
-    class T,
-    bool IsKeyCache,
-    class SharedWeakUnionPointer,
-    class SharedPointerType,
-    class Hash,
-    class KeyEqual,
-    class Mutex>
-inline Mutex&
-TaggedCache<
-    Key,
-    T,
-    IsKeyCache,
-    SharedWeakUnionPointer,
-    SharedPointerType,
-    Hash,
-    KeyEqual,
-    Mutex>::lockPartition(key_type const& key) const
-{
-    return partitionLocks_[m_cache.partition_index(key)];
-}
-
 }  // namespace ripple
 
 #endif

include/xrpl/basics/partitioned_unordered_map.h

@@ -277,12 +277,6 @@ public:
         return map_;
     }
 
-    partition_map_type const&
-    map() const
-    {
-        return map_;
-    }
-
     iterator
     begin()
     {
@@ -327,12 +321,6 @@ public:
         return cend();
     }
 
-    std::size_t
-    partition_index(key_type const& key) const
-    {
-        return partitioner(key);
-    }
-
 private:
     template <class T>
     void

include/xrpl/protocol/Protocol.h

@@ -22,6 +22,7 @@
 
 #include <xrpl/basics/ByteUtilities.h>
 #include <xrpl/basics/base_uint.h>
+#include <xrpl/basics/partitioned_unordered_map.h>
 
 #include <cstdint>
 
@@ -55,7 +56,10 @@ std::size_t constexpr oversizeMetaDataCap = 5200;
 /** The maximum number of entries per directory page */
 std::size_t constexpr dirNodeMaxEntries = 32;
 
-/** The maximum number of pages allowed in a directory */
+/** The maximum number of pages allowed in a directory
+
+    Made obsolete by fixDirectoryLimit amendment.
+*/
 std::uint64_t constexpr dirNodeMaxPages = 262144;
 
 /** The maximum number of items in an NFT page */

include/xrpl/protocol/detail/features.macro

@@ -29,9 +29,8 @@
 
 // Add new amendments to the top of this list.
 // Keep it sorted in reverse chronological order.
-// If you add an amendment here, then do not forget to increment `numFeatures`
-// in include/xrpl/protocol/Feature.h.
 
+XRPL_FIX    (DirectoryLimit,             Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FIX    (PriceOracleOrder,           Supported::no,  VoteBehavior::DefaultNo)
 XRPL_FIX    (MPTDeliveredAmount,         Supported::no,  VoteBehavior::DefaultNo)
 XRPL_FIX    (AMMClawbackRounding,        Supported::no,  VoteBehavior::DefaultNo)
@@ -41,7 +40,7 @@ XRPL_FIX    (AMMv1_3,                    Supported::yes, VoteBehavior::DefaultNo
 XRPL_FEATURE(PermissionedDEX,            Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(Batch,                      Supported::yes, VoteBehavior::DefaultNo)
 XRPL_FEATURE(SingleAssetVault,           Supported::no,  VoteBehavior::DefaultNo)
-XRPL_FEATURE(PermissionDelegation,       Supported::yes, VoteBehavior::DefaultNo)
+XRPL_FEATURE(PermissionDelegation,       Supported::no,  VoteBehavior::DefaultNo)
 XRPL_FIX    (PayChanCancelAfter,         Supported::yes, VoteBehavior::DefaultNo)
 // Check flags in Credential transactions
 XRPL_FIX    (InvalidTxFlags,             Supported::yes, VoteBehavior::DefaultNo)

src/libxrpl/protocol/BuildInfo.cpp

@@ -36,7 +36,7 @@ namespace BuildInfo {
 //  and follow the format described at http://semver.org/
 //------------------------------------------------------------------------------
 // clang-format off
-char const* const versionString = "2.6.0-rc2"
+char const* const versionString = "2.6.2"
 // clang-format on
 
 #if defined(DEBUG) || defined(SANITIZER)

src/test/app/Credentials_test.cpp

@@ -568,6 +568,39 @@ struct Credentials_test : public beast::unit_test::suite
                     jle[jss::result][jss::node]["CredentialType"] ==
                         strHex(std::string_view(credType)));
             }
+
+            {
+                testcase("Credentials fail, directory full");
+                std::uint32_t const issuerSeq{env.seq(issuer) + 1};
+                env(ticket::create(issuer, 63));
+                env.close();
+
+                // Everything below can only be tested on open ledger.
+                auto const res1 = directory::bumpLastPage(
+                    env,
+                    directory::maximumPageIndex(env),
+                    keylet::ownerDir(issuer.id()),
+                    directory::adjustOwnerNode);
+                BEAST_EXPECT(res1);
+
+                auto const jv = credentials::create(issuer, subject, credType);
+                env(jv, ter(tecDIR_FULL));
+                // Free one directory entry by using a ticket
+                env(noop(issuer), ticket::use(issuerSeq + 40));
+
+                // Fill subject directory
+                env(ticket::create(subject, 63));
+                auto const res2 = directory::bumpLastPage(
+                    env,
+                    directory::maximumPageIndex(env),
+                    keylet::ownerDir(subject.id()),
+                    directory::adjustOwnerNode);
+                BEAST_EXPECT(res2);
+                env(jv, ter(tecDIR_FULL));
+
+                // End test
+                env.close();
+            }
         }
 
         {
@@ -1094,6 +1127,7 @@ struct Credentials_test : public beast::unit_test::suite
         testSuccessful(all);
         testCredentialsDelete(all);
         testCreateFailed(all);
+        testCreateFailed(all - fixDirectoryLimit);
         testAcceptFailed(all);
         testDeleteFailed(all);
         testFeatureFailed(all - featureCredentials);

src/test/app/NetworkOPs_test.cpp

@@ -0,0 +1,80 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2020 Dev Null Productions
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <test/jtx.h>
+#include <test/jtx/CaptureLogs.h>
+#include <test/jtx/Env.h>
+
+#include <xrpld/app/misc/HashRouter.h>
+
+namespace ripple {
+namespace test {
+
+class NetworkOPs_test : public beast::unit_test::suite
+{
+public:
+    void
+    run() override
+    {
+        testAllBadHeldTransactions();
+    }
+
+    void
+    testAllBadHeldTransactions()
+    {
+        // All trasactions are already marked as SF_BAD, and we should be able
+        // to handle the case properly without an assertion failure
+        testcase("No valid transactions in batch");
+
+        std::string logs;
+
+        {
+            using namespace jtx;
+            auto const alice = Account{"alice"};
+            Env env{
+                *this,
+                envconfig(),
+                std::make_unique<CaptureLogs>(&logs),
+                beast::severities::kAll};
+            env.memoize(env.master);
+            env.memoize(alice);
+
+            auto const jtx = env.jt(ticket::create(alice, 1), seq(1), fee(10));
+
+            auto transacionId = jtx.stx->getTransactionID();
+            env.app().getHashRouter().setFlags(
+                transacionId, HashRouterFlags::HELD);
+
+            env(jtx, json(jss::Sequence, 1), ter(terNO_ACCOUNT));
+
+            env.app().getHashRouter().setFlags(
+                transacionId, HashRouterFlags::BAD);
+
+            env.close();
+        }
+
+        BEAST_EXPECT(
+            logs.find("No transaction to process!") != std::string::npos);
+    }
+};
+
+BEAST_DEFINE_TESTSUITE(NetworkOPs, app, ripple);
+
+}  // namespace test
+}  // namespace ripple

src/test/basics/TaggedCache_test.cpp

@@ -58,10 +58,10 @@ public:
         // Insert an item, retrieve it, and age it so it gets purged.
         {
             BEAST_EXPECT(c.getCacheSize() == 0);
-            BEAST_EXPECT(c.size() == 0);
+            BEAST_EXPECT(c.getTrackSize() == 0);
             BEAST_EXPECT(!c.insert(1, "one"));
             BEAST_EXPECT(c.getCacheSize() == 1);
-            BEAST_EXPECT(c.size() == 1);
+            BEAST_EXPECT(c.getTrackSize() == 1);
 
             {
                 std::string s;
@@ -72,7 +72,7 @@ public:
             ++clock;
             c.sweep();
             BEAST_EXPECT(c.getCacheSize() == 0);
-            BEAST_EXPECT(c.size() == 0);
+            BEAST_EXPECT(c.getTrackSize() == 0);
         }
 
         // Insert an item, maintain a strong pointer, age it, and
@@ -80,7 +80,7 @@ public:
         {
             BEAST_EXPECT(!c.insert(2, "two"));
             BEAST_EXPECT(c.getCacheSize() == 1);
-            BEAST_EXPECT(c.size() == 1);
+            BEAST_EXPECT(c.getTrackSize() == 1);
 
             {
                 auto p = c.fetch(2);
@@ -88,14 +88,14 @@ public:
                 ++clock;
                 c.sweep();
                 BEAST_EXPECT(c.getCacheSize() == 0);
-                BEAST_EXPECT(c.size() == 1);
+                BEAST_EXPECT(c.getTrackSize() == 1);
             }
 
             // Make sure its gone now that our reference is gone
             ++clock;
             c.sweep();
             BEAST_EXPECT(c.getCacheSize() == 0);
-            BEAST_EXPECT(c.size() == 0);
+            BEAST_EXPECT(c.getTrackSize() == 0);
         }
 
         // Insert the same key/value pair and make sure we get the same result
@@ -111,7 +111,7 @@ public:
             ++clock;
             c.sweep();
             BEAST_EXPECT(c.getCacheSize() == 0);
-            BEAST_EXPECT(c.size() == 0);
+            BEAST_EXPECT(c.getTrackSize() == 0);
         }
 
         // Put an object in but keep a strong pointer to it, advance the clock a
@@ -121,24 +121,24 @@ public:
             // Put an object in
             BEAST_EXPECT(!c.insert(4, "four"));
             BEAST_EXPECT(c.getCacheSize() == 1);
-            BEAST_EXPECT(c.size() == 1);
+            BEAST_EXPECT(c.getTrackSize() == 1);
 
             {
                 // Keep a strong pointer to it
                 auto const p1 = c.fetch(4);
                 BEAST_EXPECT(p1 != nullptr);
                 BEAST_EXPECT(c.getCacheSize() == 1);
-                BEAST_EXPECT(c.size() == 1);
+                BEAST_EXPECT(c.getTrackSize() == 1);
                 // Advance the clock a lot
                 ++clock;
                 c.sweep();
                 BEAST_EXPECT(c.getCacheSize() == 0);
-                BEAST_EXPECT(c.size() == 1);
+                BEAST_EXPECT(c.getTrackSize() == 1);
                 // Canonicalize a new object with the same key
                 auto p2 = std::make_shared<std::string>("four");
                 BEAST_EXPECT(c.canonicalize_replace_client(4, p2));
                 BEAST_EXPECT(c.getCacheSize() == 1);
-                BEAST_EXPECT(c.size() == 1);
+                BEAST_EXPECT(c.getTrackSize() == 1);
                 // Make sure we get the original object
                 BEAST_EXPECT(p1.get() == p2.get());
             }
@@ -146,7 +146,7 @@ public:
             ++clock;
             c.sweep();
             BEAST_EXPECT(c.getCacheSize() == 0);
-            BEAST_EXPECT(c.size() == 0);
+            BEAST_EXPECT(c.getTrackSize() == 0);
         }
     }
 };

src/test/jtx.h

@@ -39,6 +39,7 @@
 #include <test/jtx/delivermin.h>
 #include <test/jtx/deposit.h>
 #include <test/jtx/did.h>
+#include <test/jtx/directory.h>
 #include <test/jtx/domain.h>
 #include <test/jtx/escrow.h>
 #include <test/jtx/fee.h>

src/test/jtx/directory.h

@@ -0,0 +1,81 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2025 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_TEST_JTX_DIRECTORY_H_INCLUDED
+#define RIPPLE_TEST_JTX_DIRECTORY_H_INCLUDED
+
+#include <test/jtx/Env.h>
+
+#include <xrpl/basics/Expected.h>
+#include <xrpl/protocol/Feature.h>
+#include <xrpl/protocol/Indexes.h>
+
+#include <cstdint>
+#include <limits>
+
+namespace ripple::test::jtx {
+
+/** Directory operations. */
+namespace directory {
+
+enum Error {
+    DirectoryRootNotFound,
+    DirectoryTooSmall,
+    DirectoryPageDuplicate,
+    DirectoryPageNotFound,
+    InvalidLastPage,
+    AdjustmentError
+};
+
+/// Move the position of the last page in the user's directory on open ledger to
+/// newLastPage. Requirements:
+/// - directory must have at least two pages (root and one more)
+/// - adjust should be used to update owner nodes of the objects affected
+/// - newLastPage must be greater than index of the last page in the directory
+///
+/// Use this to test tecDIR_FULL errors in open ledger.
+/// NOTE: effects will be DISCARDED on env.close()
+auto
+bumpLastPage(
+    Env& env,
+    std::uint64_t newLastPage,
+    Keylet directory,
+    std::function<bool(ApplyView&, uint256, std::uint64_t)> adjust)
+    -> Expected<void, Error>;
+
+/// Implementation of adjust for the most common ledger entry, i.e. one where
+/// page index is stored in sfOwnerNode (and only there). Pass this function
+/// to bumpLastPage if the last page of directory has only objects
+/// of this kind (e.g. ticket, DID, offer, deposit preauth, MPToken etc.)
+bool
+adjustOwnerNode(ApplyView& view, uint256 key, std::uint64_t page);
+
+inline auto
+maximumPageIndex(Env const& env) -> std::uint64_t
+{
+    if (env.enabled(fixDirectoryLimit))
+        return std::numeric_limits<std::uint64_t>::max();
+    return dirNodeMaxPages - 1;
+}
+
+}  // namespace directory
+
+}  // namespace ripple::test::jtx
+
+#endif

src/test/jtx/impl/directory.cpp

@@ -0,0 +1,145 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2025 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <test/jtx/directory.h>
+
+#include <xrpld/ledger/Sandbox.h>
+
+namespace ripple::test::jtx {
+
+/** Directory operations. */
+namespace directory {
+
+auto
+bumpLastPage(
+    Env& env,
+    std::uint64_t newLastPage,
+    Keylet directory,
+    std::function<bool(ApplyView&, uint256, std::uint64_t)> adjust)
+    -> Expected<void, Error>
+{
+    Expected<void, Error> res{};
+    env.app().openLedger().modify(
+        [&](OpenView& view, beast::Journal j) -> bool {
+            Sandbox sb(&view, tapNONE);
+
+            // Find the root page
+            auto sleRoot = sb.peek(directory);
+            if (!sleRoot)
+            {
+                res = Unexpected<Error>(DirectoryRootNotFound);
+                return false;
+            }
+
+            // Find last page
+            auto const lastIndex = sleRoot->getFieldU64(sfIndexPrevious);
+            if (lastIndex == 0)
+            {
+                res = Unexpected<Error>(DirectoryTooSmall);
+                return false;
+            }
+
+            if (sb.exists(keylet::page(directory, newLastPage)))
+            {
+                res = Unexpected<Error>(DirectoryPageDuplicate);
+                return false;
+            }
+
+            if (lastIndex >= newLastPage)
+            {
+                res = Unexpected<Error>(InvalidLastPage);
+                return false;
+            }
+
+            auto slePage = sb.peek(keylet::page(directory, lastIndex));
+            if (!slePage)
+            {
+                res = Unexpected<Error>(DirectoryPageNotFound);
+                return false;
+            }
+
+            // Copy its data and delete the page
+            auto indexes = slePage->getFieldV256(sfIndexes);
+            auto prevIndex = slePage->at(~sfIndexPrevious);
+            auto owner = slePage->at(~sfOwner);
+            sb.erase(slePage);
+
+            // Create new page to replace slePage
+            auto sleNew =
+                std::make_shared<SLE>(keylet::page(directory, newLastPage));
+            sleNew->setFieldH256(sfRootIndex, directory.key);
+            sleNew->setFieldV256(sfIndexes, indexes);
+            if (owner)
+                sleNew->setAccountID(sfOwner, *owner);
+            if (prevIndex)
+                sleNew->setFieldU64(sfIndexPrevious, *prevIndex);
+            sb.insert(sleNew);
+
+            // Adjust root previous and previous node's next
+            sleRoot->setFieldU64(sfIndexPrevious, newLastPage);
+            if (prevIndex.value_or(0) == 0)
+                sleRoot->setFieldU64(sfIndexNext, newLastPage);
+            else
+            {
+                auto slePrev = sb.peek(keylet::page(directory, *prevIndex));
+                if (!slePrev)
+                {
+                    res = Unexpected<Error>(DirectoryPageNotFound);
+                    return false;
+                }
+                slePrev->setFieldU64(sfIndexNext, newLastPage);
+                sb.update(slePrev);
+            }
+            sb.update(sleRoot);
+
+            // Fixup page numbers in the objects referred by indexes
+            if (adjust)
+                for (auto const key : indexes)
+                {
+                    if (!adjust(sb, key, newLastPage))
+                    {
+                        res = Unexpected<Error>(AdjustmentError);
+                        return false;
+                    }
+                }
+
+            sb.apply(view);
+            return true;
+        });
+
+    return res;
+}
+
+bool
+adjustOwnerNode(ApplyView& view, uint256 key, std::uint64_t page)
+{
+    auto sle = view.peek({ltANY, key});
+    if (sle && sle->isFieldPresent(sfOwnerNode))
+    {
+        sle->setFieldU64(sfOwnerNode, page);
+        view.update(sle);
+        return true;
+    }
+
+    return false;
+}
+
+}  // namespace directory
+
+}  // namespace ripple::test::jtx

src/test/ledger/Directory_test.cpp

@@ -23,9 +23,11 @@
 #include <xrpl/basics/random.h>
 #include <xrpl/protocol/Feature.h>
 #include <xrpl/protocol/Protocol.h>
+#include <xrpl/protocol/TER.h>
 #include <xrpl/protocol/jss.h>
 
 #include <algorithm>
+#include <limits>
 
 namespace ripple {
 namespace test {
@@ -490,6 +492,91 @@ struct Directory_test : public beast::unit_test::suite
         }
     }
 
+    void
+    testDirectoryFull()
+    {
+        using namespace test::jtx;
+        Account alice("alice");
+
+        auto const testCase = [&, this](FeatureBitset features, auto setup) {
+            using namespace test::jtx;
+
+            Env env(*this, features);
+            env.fund(XRP(20000), alice);
+            env.close();
+
+            auto const [lastPage, full] = setup(env);
+
+            // Populate root page and last page
+            for (int i = 0; i < 63; ++i)
+                env(credentials::create(alice, alice, std::to_string(i)));
+            env.close();
+
+            // NOTE, everything below can only be tested on open ledger because
+            // there is no transaction type to express what bumpLastPage does.
+
+            // Bump position of last page from 1 to highest possible
+            auto const res = directory::bumpLastPage(
+                env,
+                lastPage,
+                keylet::ownerDir(alice.id()),
+                [lastPage, this](
+                    ApplyView& view, uint256 key, std::uint64_t page) {
+                    auto sle = view.peek({ltCREDENTIAL, key});
+                    if (!BEAST_EXPECT(sle))
+                        return false;
+
+                    BEAST_EXPECT(page == lastPage);
+                    sle->setFieldU64(sfIssuerNode, page);
+                    // sfSubjectNode is not set in self-issued credentials
+                    view.update(sle);
+                    return true;
+                });
+            BEAST_EXPECT(res);
+
+            // Create one more credential
+            env(credentials::create(alice, alice, std::to_string(63)));
+
+            // Not enough space for another object if full
+            auto const expected = full ? ter{tecDIR_FULL} : ter{tesSUCCESS};
+            env(credentials::create(alice, alice, "foo"), expected);
+
+            // Destroy all objects in directory
+            for (int i = 0; i < 64; ++i)
+                env(credentials::deleteCred(
+                    alice, alice, alice, std::to_string(i)));
+
+            if (!full)
+                env(credentials::deleteCred(alice, alice, alice, "foo"));
+
+            // Verify directory is empty.
+            auto const sle = env.le(keylet::ownerDir(alice.id()));
+            BEAST_EXPECT(sle == nullptr);
+
+            // Test completed
+            env.close();
+        };
+
+        testCase(
+            testable_amendments() - fixDirectoryLimit,
+            [this](Env&) -> std::tuple<std::uint64_t, bool> {
+                testcase("directory full without fixDirectoryLimit");
+                return {dirNodeMaxPages - 1, true};
+            });
+        testCase(
+            testable_amendments(),  //
+            [this](Env&) -> std::tuple<std::uint64_t, bool> {
+                testcase("directory not full with fixDirectoryLimit");
+                return {dirNodeMaxPages - 1, false};
+            });
+        testCase(
+            testable_amendments(),  //
+            [this](Env&) -> std::tuple<std::uint64_t, bool> {
+                testcase("directory full with fixDirectoryLimit");
+                return {std::numeric_limits<std::uint64_t>::max(), true};
+            });
+    }
+
     void
     run() override
     {
@@ -498,6 +585,7 @@ struct Directory_test : public beast::unit_test::suite
         testRipd1353();
         testEmptyChain();
         testPreviousTxnID();
+        testDirectoryFull();
     }
 };
 

src/test/server/ServerStatus_test.cpp

@@ -681,7 +681,7 @@ class ServerStatus_test : public beast::unit_test::suite,
             resp["Upgrade"] == "websocket");
         BEAST_EXPECT(
             resp.find("Connection") != resp.end() &&
-            resp["Connection"] == "Upgrade");
+            resp["Connection"] == "upgrade");
     }
 
     void

src/xrpld/app/ledger/LedgerHistory.cpp

@@ -63,6 +63,8 @@ LedgerHistory::insert(
         ledger->stateMap().getHash().isNonZero(),
         "ripple::LedgerHistory::insert : nonzero hash");
 
+    std::unique_lock sl(m_ledgers_by_hash.peekMutex());
+
     bool const alreadyHad = m_ledgers_by_hash.canonicalize_replace_cache(
         ledger->info().hash, ledger);
     if (validated)
@@ -74,6 +76,7 @@ LedgerHistory::insert(
 LedgerHash
 LedgerHistory::getLedgerHash(LedgerIndex index)
 {
+    std::unique_lock sl(m_ledgers_by_hash.peekMutex());
     if (auto it = mLedgersByIndex.find(index); it != mLedgersByIndex.end())
         return it->second;
     return {};
@@ -83,11 +86,13 @@ std::shared_ptr<Ledger const>
 LedgerHistory::getLedgerBySeq(LedgerIndex index)
 {
     {
+        std::unique_lock sl(m_ledgers_by_hash.peekMutex());
         auto it = mLedgersByIndex.find(index);
 
         if (it != mLedgersByIndex.end())
         {
             uint256 hash = it->second;
+            sl.unlock();
             return getLedgerByHash(hash);
         }
     }
@@ -103,6 +108,7 @@ LedgerHistory::getLedgerBySeq(LedgerIndex index)
 
     {
         // Add this ledger to the local tracking by index
+        std::unique_lock sl(m_ledgers_by_hash.peekMutex());
 
         XRPL_ASSERT(
             ret->isImmutable(),
@@ -452,6 +458,8 @@ LedgerHistory::builtLedger(
     XRPL_ASSERT(
         !hash.isZero(), "ripple::LedgerHistory::builtLedger : nonzero hash");
 
+    std::unique_lock sl(m_consensus_validated.peekMutex());
+
     auto entry = std::make_shared<cv_entry>();
     m_consensus_validated.canonicalize_replace_client(index, entry);
 
@@ -492,6 +500,8 @@ LedgerHistory::validatedLedger(
         !hash.isZero(),
         "ripple::LedgerHistory::validatedLedger : nonzero hash");
 
+    std::unique_lock sl(m_consensus_validated.peekMutex());
+
     auto entry = std::make_shared<cv_entry>();
     m_consensus_validated.canonicalize_replace_client(index, entry);
 
@@ -525,9 +535,10 @@ LedgerHistory::validatedLedger(
 bool
 LedgerHistory::fixIndex(LedgerIndex ledgerIndex, LedgerHash const& ledgerHash)
 {
-    auto ledger = m_ledgers_by_hash.fetch(ledgerHash);
+    std::unique_lock sl(m_ledgers_by_hash.peekMutex());
     auto it = mLedgersByIndex.find(ledgerIndex);
-    if (ledger && (it != mLedgersByIndex.end()) && (it->second != ledgerHash))
+
+    if ((it != mLedgersByIndex.end()) && (it->second != ledgerHash))
     {
         it->second = ledgerHash;
         return false;

src/xrpld/app/misc/NetworkOPs.cpp

@@ -1448,6 +1448,11 @@ NetworkOPsImp::processTransactionSet(CanonicalTXSet const& set)
         for (auto& t : transactions)
             mTransactions.push_back(std::move(t));
     }
+    if (mTransactions.empty())
+    {
+        JLOG(m_journal.debug()) << "No transaction to process!";
+        return;
+    }
 
     doTransactionSyncBatch(lock, [&](std::unique_lock<std::mutex> const&) {
         XRPL_ASSERT(

src/xrpld/ledger/detail/ApplyView.cpp

@@ -23,6 +23,9 @@
 #include <xrpl/beast/utility/instrumentation.h>
 #include <xrpl/protocol/Protocol.h>
 
+#include <limits>
+#include <type_traits>
+
 namespace ripple {
 
 std::optional<std::uint64_t>
@@ -92,8 +95,21 @@ ApplyView::dirAdd(
         return page;
     }
 
+    // We rely on modulo arithmetic of unsigned integers (guaranteed in
+    // [basic.fundamental] paragraph 2) to detect page representation overflow.
+    // For signed integers this would be UB, hence static_assert here.
+    static_assert(std::is_unsigned_v<decltype(page)>);
+    // Defensive check against breaking changes in compiler.
+    static_assert([]<typename T>(std::type_identity<T>) constexpr -> T {
+        T tmp = std::numeric_limits<T>::max();
+        return ++tmp;
+    }(std::type_identity<decltype(page)>{}) == 0);
+    ++page;
     // Check whether we're out of pages.
-    if (++page >= dirNodeMaxPages)
+    if (page == 0)
+        return std::nullopt;
+    if (!rules().enabled(fixDirectoryLimit) &&
+        page >= dirNodeMaxPages)  // Old pages limit
         return std::nullopt;
 
     // We are about to create a new node; we'll link it to

src/xrpld/overlay/detail/PeerImp.cpp

@@ -1286,8 +1286,7 @@ PeerImp::handleTransaction(
 
         // Charge strongly for attempting to relay a txn with tfInnerBatchTxn
         // LCOV_EXCL_START
-        if (stx->isFlag(tfInnerBatchTxn) &&
+        if (stx->isFlag(tfInnerBatchTxn))
-            getCurrentTransactionRules()->enabled(featureBatch))
         {
             JLOG(p_journal_.warn()) << "Ignoring Network relayed Tx containing "
                                        "tfInnerBatchTxn (handleTransaction).";
@@ -2851,8 +2850,7 @@ PeerImp::checkTransaction(
     {
         // charge strongly for relaying batch txns
         // LCOV_EXCL_START
-        if (stx->isFlag(tfInnerBatchTxn) &&
+        if (stx->isFlag(tfInnerBatchTxn))
-            getCurrentTransactionRules()->enabled(featureBatch))
         {
             JLOG(p_journal_.warn()) << "Ignoring Network relayed Tx containing "
                                        "tfInnerBatchTxn (checkSignature).";
@@ -2866,6 +2864,9 @@ PeerImp::checkTransaction(
             (stx->getFieldU32(sfLastLedgerSequence) <
              app_.getLedgerMaster().getValidLedgerIndex()))
         {
+            JLOG(p_journal_.info())
+                << "Marking transaction " << stx->getTransactionID()
+                << "as BAD because it's expired";
             app_.getHashRouter().setFlags(
                 stx->getTransactionID(), HashRouterFlags::BAD);
             charge(Resource::feeUselessData, "expired tx");
@@ -2922,7 +2923,7 @@ PeerImp::checkTransaction(
             {
                 if (!validReason.empty())
                 {
-                    JLOG(p_journal_.trace())
+                    JLOG(p_journal_.debug())
                         << "Exception checking transaction: " << validReason;
                 }
 
@@ -2949,7 +2950,7 @@ PeerImp::checkTransaction(
         {
             if (!reason.empty())
             {
-                JLOG(p_journal_.trace())
+                JLOG(p_journal_.debug())
                     << "Exception checking transaction: " << reason;
             }
             app_.getHashRouter().setFlags(

src/xrpld/rpc/handlers/GetCounts.cpp

@@ -114,7 +114,7 @@ getCountsJson(Application& app, int minObjectCount)
     ret[jss::treenode_cache_size] =
         app.getNodeFamily().getTreeNodeCache()->getCacheSize();
     ret[jss::treenode_track_size] =
-        static_cast<int>(app.getNodeFamily().getTreeNodeCache()->size());
+        app.getNodeFamily().getTreeNodeCache()->getTrackSize();
 
     std::string uptime;
     auto s = UptimeClock::now();