Fix logs rotation issue

src/Daemon/BaseDaemon.cpp

@@ -1018,6 +1018,14 @@ void BaseDaemon::setupWatchdog()
             logger().setChannel(log);
         }
 
+        /// Cuncurrent writing logs to the same file from two threads is questionable on its own,
+        ///  but rotating them from two threads is disastrous.
+        if (auto * channel = dynamic_cast<DB::OwnSplitChannel *>(logger().getChannel()))
+        {
+            channel->setChannelProperty("log", Poco::FileChannel::PROP_ROTATION, "never");
+            channel->setChannelProperty("log", Poco::FileChannel::PROP_ROTATEONOPEN, "false");
+        }
+
         logger().information(fmt::format("Will watch for the process with pid {}", pid));
 
         /// Forward signals to the child process.

src/Loggers/OwnFormattingChannel.h

@@ -38,6 +38,12 @@ public:
             pChannel->close();
     }
 
+    void setProperty(const std::string& name, const std::string& value) override
+    {
+        if (pChannel)
+            pChannel->setProperty(name, value);
+    }
+
     void log(const Poco::Message & msg) override;
     void logExtended(const ExtendedLogMessage & msg) override;
 

src/Loggers/OwnSplitChannel.cpp

@@ -169,4 +169,14 @@ void OwnSplitChannel::setLevel(const std::string & name, int level)
      }
 }
 
+void OwnSplitChannel::setChannelProperty(const std::string& channel_name, const std::string& name, const std::string& value)
+{
+    auto it = channels.find(channel_name);
+    if (it != channels.end())
+    {
+        if (auto * channel = dynamic_cast<DB::OwnFormattingChannel *>(it->second.first.get()))
+            channel->setProperty(name, value);
+    }
+}
+
 }

src/Loggers/OwnSplitChannel.h

@@ -24,6 +24,9 @@ class OwnSplitChannel : public Poco::Channel
 public:
     /// Makes an extended message from msg and passes it to the client logs queue and child (if possible)
     void log(const Poco::Message & msg) override;
+
+    void setChannelProperty(const std::string& channel_name, const std::string& name, const std::string& value);
+
     /// Adds a child channel
     void addChannel(Poco::AutoPtr<Poco::Channel> channel, const std::string & name);