diff --git a/src/comm/comm_client.cpp b/src/comm/comm_client.cpp
index cf6e4a69..3dde5341 100644
--- a/src/comm/comm_client.cpp
+++ b/src/comm/comm_client.cpp
@@ -52,7 +52,7 @@ namespace comm
             {
                 close(read_fd);
                 close(write_fd);
-                
+
                 util::kill_process(pid, false);
                 return -1;
             }
@@ -63,7 +63,7 @@ namespace comm
         {
             // Websocat process.
             util::unmask_signal();
-            
+
             close(write_pipe[1]); //parent write
             close(read_pipe[0]);  //parent read
 
@@ -85,7 +85,7 @@ namespace comm
                 NULL};
 
             const int ret = execv(execv_args[0], execv_args);
-            LOG_ERROR << errno << ": websocat process execv failed.";
+            std::cerr << errno << ": websocat process execv failed.\n";
             exit(1);
         }
         else
diff --git a/src/comm/comm_server.cpp b/src/comm/comm_server.cpp
index 5f85203c..36c90df3 100644
--- a/src/comm/comm_server.cpp
+++ b/src/comm/comm_server.cpp
@@ -335,7 +335,7 @@ namespace comm
             execv_args[idx] = NULL;
 
             const int ret = execv(execv_args[0], execv_args);
-            LOG_ERROR << errno << ": websocketd process execv failed.";
+            std::cerr << errno << ": websocketd process execv failed.\n";
             exit(1);
         }
         else
diff --git a/src/cons/cons.cpp b/src/cons/cons.cpp
index ea650dd8..5da62c5e 100644
--- a/src/cons/cons.cpp
+++ b/src/cons/cons.cpp
@@ -280,14 +280,14 @@ namespace cons
             // only consider recent proposals and proposals from previous stage and current stage.
             const bool keep_candidate = (time_diff < (conf::cfg.roundtime * 4)) && (stage_diff == -3 || stage_diff <= 1);
             LOG_DEBUG << (keep_candidate ? "Prop--->" : "Erased")
-                    << " [s" << std::to_string(cp.stage)
-                    << "] u/i/o:" << cp.users.size()
-                    << "/" << cp.hash_inputs.size()
-                    << "/" << cp.hash_outputs.size()
-                    << " ts:" << std::to_string(cp.time)
-                    << " lcl:" << cp.lcl.substr(0, 15)
-                    << " state:" << cp.state
-                    << " [from:" << ((cp.pubkey == conf::cfg.pubkey) ? "self" : util::get_hex(cp.pubkey, 1, 5)) << "]";
+                      << " [s" << std::to_string(cp.stage)
+                      << "] u/i/o:" << cp.users.size()
+                      << "/" << cp.hash_inputs.size()
+                      << "/" << cp.hash_outputs.size()
+                      << " ts:" << std::to_string(cp.time)
+                      << " lcl:" << cp.lcl.substr(0, 15)
+                      << " state:" << cp.state
+                      << " [from:" << ((cp.pubkey == conf::cfg.pubkey) ? "self" : util::get_hex(cp.pubkey, 1, 5)) << "]";
 
             if (keep_candidate)
                 ++itr;
@@ -377,7 +377,7 @@ namespace cons
         p2p::broadcast_message(fbuf, true);
 
         LOG_DEBUG << "NUP sent."
-                << " users:" << nup.user_inputs.size();
+                  << " users:" << nup.user_inputs.size();
     }
 
     /**
@@ -524,7 +524,7 @@ namespace cons
             // before execution chdir into a valid the latest state data directory that contains an appbill.table
             chdir(conf::ctx.state_rw_dir.c_str());
             int ret = execv(execv_args[0], execv_args);
-            LOG_ERROR << "Appbill process execv failed: " << ret;
+            std::cerr << errno << ": Appbill process execv failed.\n";
             return false;
         }
         else
@@ -667,11 +667,11 @@ namespace cons
             p2p::broadcast_message(fbuf, true);
 
         LOG_DEBUG << "Proposed u/i/o:" << p.users.size()
-                << "/" << p.hash_inputs.size()
-                << "/" << p.hash_outputs.size()
-                << " ts:" << std::to_string(p.time)
-                << " lcl:" << p.lcl.substr(0, 15)
-                << " state:" << p.state;
+                  << "/" << p.hash_inputs.size()
+                  << "/" << p.hash_outputs.size()
+                  << " ts:" << std::to_string(p.time)
+                  << " lcl:" << p.lcl.substr(0, 15)
+                  << " state:" << p.state;
     }
 
     /**
diff --git a/src/hpfs/hpfs.cpp b/src/hpfs/hpfs.cpp
index 875b46fb..3e3b61af 100644
--- a/src/hpfs/hpfs.cpp
+++ b/src/hpfs/hpfs.cpp
@@ -67,7 +67,7 @@ namespace hpfs
                 NULL};
 
             const int ret = execv(execv_args[0], execv_args);
-            LOG_ERROR << errno << ": hpfs merge process execv failed.";
+            std::cerr << errno << ": hpfs merge process execv failed.\n";
             exit(1);
         }
         else
@@ -165,7 +165,7 @@ namespace hpfs
                 NULL};
 
             const int ret = execv(execv_args[0], execv_args);
-            LOG_ERROR << errno << ": hpfs session process execv failed.";
+            std::cerr << errno << ": hpfs session process execv failed.\n";
             exit(1);
         }
         else
diff --git a/src/sc.cpp b/src/sc.cpp
index e53e046a..0c26c5f3 100644
--- a/src/sc.cpp
+++ b/src/sc.cpp
@@ -26,6 +26,9 @@ namespace sc
         }
 
         int ret = 0;
+
+        LOG_DEBUG << "Starting contract process..." << (ctx.args.readonly ? " (rdonly)" : "");
+
         const pid_t pid = fork();
         if (pid > 0)
         {
@@ -74,8 +77,6 @@ namespace sc
             // Write the contract input message from HotPocket to the stdin (0) of the contract process.
             write_contract_args(ctx);
 
-            LOG_DEBUG << "Starting contract process..." << (ctx.args.readonly ? " (rdonly)" : "");
-
             const bool using_appbill = !ctx.args.readonly && !conf::cfg.appbill.empty();
             int len = conf::cfg.runtime_binexec_args.size() + 1;
             if (using_appbill)
@@ -97,7 +98,7 @@ namespace sc
             chdir(ctx.args.state_dir.c_str());
 
             int ret = execv(execv_args[0], execv_args);
-            LOG_ERROR << errno << ": Contract process execv failed." << (ctx.args.readonly ? " (rdonly)" : "");
+            std::cerr << errno << ": Contract process execv failed." << (ctx.args.readonly ? " (rdonly)" : "") << "\n";
             exit(1);
         }
         else
@@ -160,7 +161,7 @@ namespace sc
             return -1;
 
         LOG_DEBUG << "Stopping hpfs session... pid:" << ctx.hpfs_pid << (ctx.args.readonly ? " (rdonly)" : "");
-       
+
         if (util::kill_process(ctx.hpfs_pid, true) == -1)
             return -1;