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    [Dev] Feathercoin 0.9.6.2 * Maintenance fix, build & upgrade issues notes.

    Technical Development
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    • wrapper
      wrapper Moderators last edited by wrapper

      ERROR: AcceptToMemoryPool : nonstandard transaction: non-final

      main.cpp Line 899

          if (Params().NetworkID() == CChainParams::MAIN && !IsStandardTx(tx, reason))
               return state.DoS(0,
                           error("AcceptToMemoryPool : nonstandard transaction: %s", reason),
                           REJECT_NONSTANDARD, reason);
      

      Original code

          if (Params().NetworkID() == CChainParams::MAIN && !IsStandardTx(tx, reason))
               if (fDebug)
                    LogPrintf("AcceptToMemoryPool : nonstandard transaction: %s");
               return state.DoS(0,NULL, REJECT_NONSTANDARD, reason);
      
      1 Reply Last reply Reply Quote 0
      • wrapper
        wrapper Moderators last edited by

        Remaining Debug Output :

        2017-08-12 11:53:42 No coin database inconsistencies in last 289 blocks (484 transactions)
        2017-08-12 11:53:42 init message: Checking ACP …
        2017-08-12 11:53:42 block index 14099ms
        2017-08-12 11:53:42 init message: Loading wallet…
        2017-08-12 11:53:43 nFileVersion = 90602
        2017-08-12 11:53:43 Keys: 0 plaintext, 0 encrypted, 149 w/ metadata, 0 total
        2017-08-12 11:53:43 wallet 209ms
        2017-08-12 11:53:43 init message: Loading addresses…
        2017-08-12 11:53:28 Feathercoin version v0.9.6.2-ftcit-Standard (2017-07-14 17:27:25 +0200)
        2017-08-12 11:53:28 Using OpenSSL version OpenSSL 1.0.2g 1 Mar 2016
        2017-08-12 11:53:28 Using BerkeleyDB version Berkeley DB 5.3.28: (September 9, 2013)
        2017-08-12 11:53:28 Default data directory /home/wrapper/.feathercoin
        2017-08-12 11:53:28 Using data directory /home/wrapper/.feathercoin
        2017-08-12 11:53:28 Using at most 125 connections (1024 file descriptors available)
        2017-08-12 11:53:28 Using 8 threads for script verification
        2017-08-12 11:53:28 Using wallet wallet.dat
        2017-08-12 11:53:28 init message: Verifying wallet…
        2017-08-12 11:53:28 init message: Loading block index…
        2017-08-12 11:53:42 LoadBlockIndexDB(): synchronized checkpoint 12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2
        2017-08-12 11:53:42 init message: Verifying blocks…
        2017-08-12 11:53:42 pindex->GetBlockHash()=27194dbff22fde7e4c1552ac82d3e610e405a65d2236d2ebbfa42a7565229b2a
        2017-08-12 11:53:42 view.GetBestBlock()=27194dbff22fde7e4c1552ac82d3e610e405a65d2236d2ebbfa42a7565229b2a
        2017-08-12 11:53:43 Loaded 10230 addresses from peers.dat 43ms
        2017-08-12 11:53:43 mapBlockIndex.size() = 1089184
        2017-08-12 11:53:43 nBestHeight = 1089183
        2017-08-12 11:53:43 setKeyPool.size() = 100
        2017-08-12 11:53:43 mapWallet.size() = 21
        2017-08-12 11:53:43 mapAddressBook.size() = 45
        2017-08-12 11:53:43 init message: Done loading
        2017-08-12 11:53:43 Initialization result: 1
        2017-08-12 11:53:45 GetMyExternalIP() returned xxx.xxx.xxx.xxx
        2017-08-12 11:53:45 AddLocal(xxx.xxx.xxx.xxx:9336,4)
        2017-08-12 11:53:45 ext-ip thread exit
        2017-08-12 11:53:54 dnsseed thread exit

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        • wrapper
          wrapper Moderators last edited by

          Re: LoadBlockIndexDB(): synchronized checkpoint 12a765e31ffd4059bada1e25190f6e98c99d9714d334efa41a195a7e7e04bfe2

          **main.cpp - Line 3544

          // ppcoin: load hashSyncCheckpoint
          if (!pblocktree->ReadSyncCheckpoint(hashSyncCheckpoint))
          	 LogPrintf("LoadBlockIndexDB(): synchronized checkpoint not read\n");
          else
          	 LogPrintf("LoadBlockIndexDB(): synchronized checkpoint %s\n", hashSyncCheckpoint.ToString().c_str());
          

          Original code

          if (!pblocktree->ReadSyncCheckpoint(hashSyncCheckpoint))
          	 LogPrintf("LoadBlockIndexDB(): synchronized checkpoint not read\n");
          else
               if (fDebug)
               	 LogPrintf("LoadBlockIndexDB(): synchronized checkpoint %s\n", hashSyncCheckpoint.ToString().c_str());
          
          1 Reply Last reply Reply Quote 0
          • wrapper
            wrapper Moderators last edited by wrapper

            Re: pindex->GetBlockHash() and view.GetBestBlock()

            2017-08-12 12:19:10 init message: Verifying blocks…
            2017-08-12 12:19:10 pindex->GetBlockHash()=e99f253c8e758d109b7b52b17509d34196229628ead58ac3fe4ab4d278e97acc
            2017-08-12 12:19:10 view.GetBestBlock()=e99f253c8e758d109b7b52b17509d34196229628ead58ac3fe4ab4d278e97acc

            main.cpp - Line 1823

                  LogPrintf("pindex->GetBlockHash()=%s \n",pindex->GetBlockHash().ToString());
                 LogPrintf("view.GetBestBlock()=%s \n",view.GetBestBlock().ToString());
            

            Original code

                  if (fDebug)
                       LogPrintf("pindex->GetBlockHash()=%s \n",pindex->GetBlockHash().ToString());
                  if (fDebug)
                       LogPrintf("view.GetBestBlock()=%s \n",view.GetBestBlock().ToString());
            

            Updated code

            if (fDebug)
                 LogPrintf("ConnectBlock hashPrevBlock=%s \n",hashPrevBlock.ToString());
            if (fDebug)
                 LogPrintf("ConnectBlock view.GetBestBlock()=%s \n",view.GetBestBlock().ToString());
            

            Code update main.cpp Line 1957

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            • wrapper
              wrapper Moderators last edited by wrapper

              Re: Loaded 10230 addresses from peers.dat 43ms

              init.cpp Line 1109

                 if (fDebug) 
                       LogPrintf("Loaded %i addresses from peers.dat  %dms\n", addrman.size(), GetTimeMillis() - nStart);
              

              Code updated

              init.cpp - Line 1121

              if (fDebug)
                   {
                          LogPrintf("mapBlockIndex.size() = %u\n",   mapBlockIndex.size());
                          LogPrintf("nBestHeight = %d\n", chainActive.Height());
                   }
               #ifdef ENABLE_WALLET
                   if (fDebug)
                        {
                        LogPrintf("setKeyPool.size() = %u\n",      pwalletMain ? pwalletMain->setKeyPool.size() : 0);
                        LogPrintf("mapWallet.size() = %u\n",       pwalletMain ? pwalletMain->mapWallet.size() : 0);
                        LogPrintf("mapAddressBook.size() = %u\n",  pwalletMain ? pwalletMain->mapAddressBook.size() : 0);
                         }
                #endif
              

              Updated code

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              • wrapper
                wrapper Moderators last edited by wrapper

                Remaining Debug messages

                2017-08-12 12:51:41 Feathercoin version v0.9.6.2-ftcit-Standard (2017-07-14 17:27:25 +0200)
                2017-08-12 12:51:41 Using OpenSSL version OpenSSL 1.0.2g 1 Mar 2016
                2017-08-12 12:51:41 Using BerkeleyDB version Berkeley DB 5.3.28: (September 9, 2013)
                2017-08-12 12:51:41 Default data directory /home/wrapper/.feathercoin
                2017-08-12 12:51:41 Using data directory /home/wrapper/.feathercoin
                2017-08-12 12:51:41 Using at most 125 connections (1024 file descriptors available)
                2017-08-12 12:51:41 Using 8 threads for script verification
                2017-08-12 12:51:41 Using wallet wallet.dat
                2017-08-12 12:51:41 init message: Verifying wallet…
                2017-08-12 12:51:41 init message: Loading block index…
                2017-08-12 12:51:56 init message: Verifying blocks…
                2017-08-12 12:51:56 No coin database inconsistencies in last 289 blocks (535 transactions)
                2017-08-12 12:51:56 init message: Checking ACP …
                2017-08-12 12:51:56 block index 14829ms
                2017-08-12 12:51:56 init message: Loading wallet…
                2017-08-12 12:51:56 nFileVersion = 90602
                2017-08-12 12:51:56 Keys: 0 plaintext, 0 encrypted, 149 w/ metadata, 0 total
                2017-08-12 12:51:56 wallet 220ms
                2017-08-12 12:51:56 init message: Loading addresses…
                2017-08-12 12:51:56 init message: Done loading
                2017-08-12 12:51:56 Initialization result: 1
                2017-08-12 12:51:58 connect() to 73.96.36.22:9336 failed after select(): Connection refused (111)
                2017-08-12 12:52:01 ERROR: GetMyExternalIP() : connection to 91.198.22.70:80 failed
                2017-08-12 12:52:02 GetMyExternalIP() returned xxx.xxx.xxx.xxx
                2017-08-12 12:52:02 AddLocal(xxx.xxx.xxx.xxx:9336,4)
                2017-08-12 12:52:02 ext-ip thread exit
                2017-08-12 12:52:07 dnsseed thread exit
                2017-08-12 12:52:24 connect() to xxx.xxx.xxx.xxx:9336 failed after select(): No route to host (113)

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                • wrapper
                  wrapper Moderators last edited by wrapper

                  init.cpp Line 638

                      if (GetBoolArg("-shrinkdebugfile", !fDebug))
                           ShrinkDebugFile();
                       if (fDebug)
                           {
                             LogPrintf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
                             LogPrintf("Feathercoin version %s (%s)\n", FormatFullVersion(), CLIENT_DATE);
                             LogPrintf("Using OpenSSL version %s\n",  SSLeay_version(SSLEAY_VERSION));
                                }
                   #ifdef ENABLE_WALLET
                       if (fDebug) 
                           LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(0, 0, 0));
                   #endif
                       if (fDebug)
                           {
                                 if (!fLogTimestamps)
                                     LogPrintf("Startup time: %s\n", DateTimeStrFormat("%Y-%m-%d %H:%M:%S", GetTime()));
                                   LogPrintf("Default data directory %s\n", GetDefaultDataDir().string());
                                   LogPrintf("Using data directory %s\n", strDataDir);
                                   LogPrintf("Using at most %i connections (%i file descriptors available)\n", nMaxConnections, nFD);
                           }     
                        std::ostringstream strErrors;
                  

                  if (fDebug) added to a number of “normal condition” debug messages.

                  walletdb ~ Line 700

                        if (fDebug)
                       {
                            LogPrintf("nFileVersion = %d\n", wss.nFileVersion);
                            LogPrintf("Keys: %u plaintext, %u encrypted, %u w/ metadata, %u total\n",
                                 wss.nKeys, wss.nCKeys, wss.nKeyMeta, wss.nKeys + wss.nCKeys);
                        }
                  

                  Code added

                  init.cpp Line 949

                       if (fDebug)
                           LogPrintf(" block index %15dms\n", GetTimeMillis() - nStart);
                  

                  Code added

                  net.cpp Line 489

                  /// debug print
                      if (fDebug)
                           LogPrint("net", "trying connection %s lastseen=%.1fhrs\n",
                  

                  Code added

                  net.cpp Line 348

                         if (fDebug)  
                              LogPrintf("GetMyExternalIP() received [%s] %s\n", strLine, addr.ToString());
                  

                  init.cpp Line 672

                  if (!fDisableWallet) {
                      if (fDebug)
                           LogPrintf("Using wallet %s\n", strWalletFile);
                      uiInterface.InitMessage(_("Verifying wallet..."));
                  

                  Code added

                  init.cpp Line 661

                      if (nScriptCheckThreads) {
                          if (fDebug)
                               LogPrintf("Using %u threads for script verification\n", nScriptCheckThreads);
                  

                  Code added

                  /src/qt/bitcoin.cpp Line 446

                  if (fDebug)
                      LogPrintf("Shutdown result: %i\n", retval);
                  

                  /src/qt/bitcoin.cpp Line 390

                  if (fDebug)
                      LogPrintf("Initialization result: %i\n", retval);
                  

                  Code added

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                  • wrapper
                    wrapper Moderators last edited by wrapper

                    net.cpp Line 316

                    if (!ConnectSocket(addrConnect, hSocket))
                        {
                        if (fDebug)    
                             LogPrintf("GetMyExternalIP() : connection to %s failed", addrConnect.ToString());
                        return true;
                        }
                    

                    Debug selection code added, removed from return error.

                    init.cpp Line 112

                    if (fDebug)
                       LogPrintf("Shutdown : In progress...\n");
                    

                    init.cpp Line 152

                    if (fDebug)
                        LogPrintf("Shutdown : done\n");
                    

                    Code added

                    net.cpp Line 240

                    if (fDebug)
                        LogPrintf("AddLocal(%s,%i)\n", addr.ToString(), nScore);
                    

                    net.cpp Line 1732

                                {
                                    if (fDebug)
                                       LogPrintf("IPv4 %s: %s\n", ifa->ifa_name, addr.ToString());
                    
                    
                                }
                    

                    net.cpp Line 429

                        if (fDebug)
                             LogPrintf("GetMyExternalIP() returned %s\n", addrLocalHost.ToStringIP());
                        AddLocal(addrLocalHost, LOCAL_HTTP);
                    

                    netbase.cpp Line 366

                               if (fDebug)
                                    LogPrintf("select() for %s failed: %s\n", addrConnect.ToString(), NetworkErrorString(WSAGetLastError()));
                    

                    netbase.cpp Line 385

                                if (fDebug)
                                    LogPrintf("connect() to %s failed after select(): %s\n", addrConnect.ToString(), NetworkErrorString(nRet));
                    

                    init.cpp Line 1062

                        if (fDebug)
                        {
                             LogPrintf("%s", strErrors.str());
                             LogPrintf(" wallet      %15dms\n", GetTimeMillis() - nStart);
                        }
                    

                    main.cpp Line 4722

                        if (fDebug)
                            LogPrintf("Receive checkpoint,hashCheckpoint=%s\n.",checkpoint.hashCheckpoint.ToString().c_str());
                    
                        if (checkpoint.ProcessSyncCheckpoint(pfrom))
                        {
                                if fDebug)
                                   LogPrintf("checkpoint.ProcessSyncCheckpoint(pfrom)=true, hashCheckpoint=%s\n.",checkpoint.hashCheckpoint.ToString().c_str());
                    

                    Code Added

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                    • wrapper
                      wrapper Moderators last edited by wrapper

                      net.cpp - Line 1771

                       if (fDebug)
                          LogPrintf("StopNode()\n");
                      

                      net.cpp - Line 1799

                         if (fDebug)
                             LogPrintf("DNS seeding disabled\n");
                      

                      Util.h

                      Various thread start end messages

                         { 
                               if (fDebug)
                          /        LogPrintf("%s thread start\n", name);
                               func();
                               if (fDebug)
                                    LogPrintf("%s thread exit\n", name);
                           }
                           catch (boost::thread_interrupted)
                           {
                                if (fDebug)
                                      LogPrintf("%s thread interrupt\n", name);
                      

                      Code added

                      /src/qt/bitcoin.cpp

                      if (fDebug)
                          LogPrintf("Requesting initialize\n");
                      
                      
                      if (f Debug)
                         LogPrintf("Requesting shutdown\n");
                      
                      if (fDebug)
                         LogPrintf("Stopping thread\n");
                      emit stopThread();
                      coreThread->wait();
                      if (fDebug)
                          LogPrintf("Stopped thread\n");
                      

                      Code added

                           {
                               if (fDebug)
                                   LogPrintf("Running Shutdown in thread\n");
                               threadGroup.interrupt_all();
                               threadGroup.join_all();
                               Shutdown();
                               if (fDebug)
                                   LogPrintf("Shutdown finished\n");
                      

                      Code added

                          if (fDebug)
                              LogPrintf("Running AppInit2 in thread\n");
                      

                      Code added

                      if (fDebug)
                          LogPrintf("init message: %s\n", message);
                      

                      Code added

                      if (fDebug)
                          LogPrint("qt", "GUI: %s\n", msg);
                      

                      Code added

                      if (fDebug)
                           LogPrint("qt", "GUI: %s\n", qPrintable(msg));
                      

                      Code added

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                      • wrapper
                        wrapper Moderators last edited by wrapper

                        Remaining Messages

                        2017-08-12 18:01:39 Receive checkpoint,hashCheckpoint=0000000000000000000000000000000000000000000000000000000000000000
                        .ERROR: CSyncCheckpoint::CheckSignature() : verify signature failed
                        2017-08-12 18:02:05 UPNP_DeletePortMapping() returned : 0

                        net.cpp

                                if (fDebug)
                                    LogPrintf("UPNP_DeletePortMapping() returned : %d\n", r);
                        

                        Code added

                                if(r != UPNPCOMMAND_SUCCESS)
                                    if (fDebug)
                                         LogPrintf("UPnP: GetExternalIPAddress() returned %d\n", r);
                                else
                        

                        Code added

                                   else
                                        if (fDebug)
                                            LogPrintf("UPnP: GetExternalIPAddress failed.\n");
                        

                        Code added

                                    if(r!=UPNPCOMMAND_SUCCESS)
                                        if (fDebug)
                                            LogPrintf("AddPortMapping(%s, %s, %s) failed with code %d (%s)\n",
                                            port, port, lanaddr, r, strupnperror(r));
                        

                        Code added

                        checkpointsync.cpp

                        if (!key.SetPubKey(ParseHex(strMasterPubKey)))
                            {
                            if (fDebug)
                                LogPrintf("CSyncCheckpoint::CheckSignature() : SetPubKey failed");
                            return true;
                            }
                        if (!key.Verify(Hash(vchMsg.begin(), vchMsg.end()), vchSig))
                            {
                            if (fDebug)
                                LogPrintf("CSyncCheckpoint::CheckSignature() : verify signature failed");
                            return true;
                            }
                        

                        Code added

                        1 Reply Last reply Reply Quote 1
                        • Wellenreiter
                          Wellenreiter Moderators last edited by

                          I’d keep the last one, as ACP checkpoint checksignature failed is relative important

                          Feathercoin development donation address: 6p8u3wtct7uxRGmvWr2xvPxqRzbpbcd82A
                          Openpgp key: 0x385C34E77F0D74D7 (at keyserver.ubuntu.com)/fingerprint: C7B4 E9EA 17E1 3D12 07AB 1FDB 385C 34E7 7F0D 74D7

                          1 Reply Last reply Reply Quote 1
                          • wrapper
                            wrapper Moderators last edited by wrapper

                            I’ve been through and added more, if (fDebug) (as opposed to just commenting them out) .

                            Most of the debug messages are still there, you just have to run -debug to see them. The checkpoint “error” did not seem to be a “Fault”, just a none complaint checkpoint.

                            1 Reply Last reply Reply Quote 1
                            • wrapper
                              wrapper Moderators last edited by wrapper

                              [FAQ] What is the difference between LogPrint() and LogPrintf() in the Feathercoin/Bitcoin source code?

                              Under normal conditions the LogPrintf() should only be used to report an unusual error, otherwise it is used during development to confirm an action and commented out for production versions.

                              Writing unnecessary messages to debug slows the system and takes up disk space. Whilst the debug can be shrunk, this relies on additional parameters being passed or set up at install time.

                              LogPrintf() statements log the output into debug.log file. LogPrint() statements only out put to the log file if -debug is set.

                              1 Reply Last reply Reply Quote 0
                              • wrapper
                                wrapper Moderators last edited by

                                main.h

                                 static const unsigned int DEFAULT_MAX_ORPHAN_TRANSACTIONS = 100;
                                  /** Default for -maxorphanblocks, maximum number of orphan blocks kept in memory */
                                 -static const unsigned int DEFAULT_MAX_ORPHAN_BLOCKS = 750;
                                
                                 +static const unsigned int DEFAULT_MAX_ORPHAN_BLOCKS = 7500;
                                
                                  /** The maximum size of a blk?????.dat file (since 0.8) */
                                

                                Increased Max orphans default to 7500.

                                Wellenreiter 1 Reply Last reply Reply Quote 0
                                • Wellenreiter
                                  Wellenreiter Moderators @wrapper last edited by

                                  @wrapper

                                  too high. I’d try 1500.

                                  There is a reason to limit the max number of orphan blocks

                                  Feathercoin development donation address: 6p8u3wtct7uxRGmvWr2xvPxqRzbpbcd82A
                                  Openpgp key: 0x385C34E77F0D74D7 (at keyserver.ubuntu.com)/fingerprint: C7B4 E9EA 17E1 3D12 07AB 1FDB 385C 34E7 7F0D 74D7

                                  wrapper 1 Reply Last reply Reply Quote 0
                                  • wrapper
                                    wrapper Moderators @Wellenreiter last edited by wrapper

                                    @Wellenreiter said in [Dev] Feathercoin 0.9.6.2 * Maintenance fix, build & upgrade issues notes.:

                                    @wrapper

                                    too high. I’d try 1500.

                                    There is a reason to limit the max number of orphan blocks

                                    I’ve tested it at 10,000 and that is (7500) what Dogecoin raised it to. There is no point it being lower, it was set too low.

                                    Wellenreiter 1 Reply Last reply Reply Quote 0
                                    • Wellenreiter
                                      Wellenreiter Moderators @wrapper last edited by Wellenreiter

                                      @wrapper it’s a security measure against (D)DOS attacks to the BC, so it will work even when set to 10000000, but may stall the BC, if someone injects a high number of orphans. I’m not sure how many orphans an attacker could create, but…

                                      Feathercoin development donation address: 6p8u3wtct7uxRGmvWr2xvPxqRzbpbcd82A
                                      Openpgp key: 0x385C34E77F0D74D7 (at keyserver.ubuntu.com)/fingerprint: C7B4 E9EA 17E1 3D12 07AB 1FDB 385C 34E7 7F0D 74D7

                                      1 Reply Last reply Reply Quote 0
                                      • wrapper
                                        wrapper Moderators last edited by

                                        From the sync tests, we know there are already > 6000 ORHAN BLOCKS chains in the Blockchain already…

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                                        • wrapper
                                          wrapper Moderators last edited by wrapper

                                          https://github.com/FeatherCoin/Feathercoin/pull/216

                                          Debug.log io review - Resultant fixes / improvements:

                                          A large number of debug messages were only useful in development and have been commented out.

                                          A further large number of messages only indicate information in an error condition and have will now only write out if -debug is set.

                                          A small number of error messages are alerted during sync, because they are on an orphan chain, that is correct (to have the error). Further errors may need investigating so they were changed to write on -debug.

                                          Because the max ORPHAN BLOCKS in a chain exceeds the current temporary memory pool during sync, this caused stalling whilst the memory was reloaded. The memory can be increased with a switch -maxorphanblocks=10000 - This has been increased from 750 to 7500, as per Dogecoin fix, is being tested for sufficiency / memory issues.

                                          A number of LogPrintf() messages were reviewed and considered useful error messages to write to Debug.log that may help support in unusual circumstances. These were left unchainged.

                                          UTF-8 translations were backported from 0.11.2

                                          The Feathercoin client is now starting and stopping without creating a debug.log. When Debug is initiated the information is more succinct and relevant. The synchronization time is very significantly improved.

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                                          • wrapper
                                            wrapper Moderators last edited by wrapper

                                            Remaining Messages no Debug:

                                            2017-08-13 13:48:40 partner xxx.xxx.xxx.xxx:9336 using obsolete version 60002; disconnecting
                                            2017-08-13 13:48:40 ProcessMessage(version, 102 bytes) FAILED
                                            2017-08-13 14:00:00 ERROR: CAlert::CheckSignature() : verify signature failed
                                            2017-08-13 14:00:51 ERROR: CheckBlockHeader() : block with timestamp before last checkpoint
                                            2017-08-13 14:00:51 ERROR: ProcessBlock() : CheckBlock FAILED
                                            2017-08-13 14:00:51 ERROR: CheckBlockHeader() : block with timestamp before last checkpoint
                                            2017-08-13 14:00:51 ERROR: ProcessBlock() : CheckBlock FAILED

                                            Large block same message then :

                                            2017-08-13 14:08:52 socket recv error Connection reset by peer (104)

                                            ~Block 1145437

                                            src/main.cpp - Line 2835
                                            2017-08-13 14:00:51 ERROR: CheckBlockHeader() : block with timestamp before last checkpoint

                                                 if (deltaTime < 0)
                                                   {
                                                       return state.DoS(100, error("CheckBlockHeader() : block with timestamp before last checkpoint"),
                                                     REJECT_CHECKPOINT, "time-too-old");
                                            

                                            These are old rejected blocks, I assume, so not required on sync.

                                            main.cpp - Updated code

                                                 {
                                                     if (fDebug)
                                                          LogPrintf("CheckBlockHeader() : block with timestamp before last checkpoint");
                                                     return state.DoS(100, NULL,
                                                                      REJECT_CHECKPOINT, "time-too-old");
                                                 }
                                            

                                            Code added

                                            main.cpp Line 3199

                                            if (!CheckBlock(*pblock, state, INT_MAX)) 
                                            	  return error("ProcessBlock() : CheckBlock FAILED");
                                            

                                            Updated to :

                                            if (!CheckBlock(*pblock, state, INT_MAX)) 
                                                      if (fDebug)
                                                          LogPrintf("ProcessBlock() : CheckBlock FAILED");
                                            	  return true ;
                                            

                                            netbase.cpp

                                            Update with Bitcoin bug fix to correct (104) error

                                            https://github.com/bitcoin/bitcoin/issues/4552
                                            https://github.com/bitcoin/bitcoin/commit/109849e204f91d8b04b0e57da87e45b461096b50

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