Diffrent thread send heartbeat to server at the same time about sofa-bolt

[tongtaodragon]

Environment
SOFABolt version:
com.alipay.sofa
bolt
1.6.5
JVM version (e.g. java -version):
java version "1.8.0_331"
Java(TM) SE Runtime Environment (build 1.8.0_331-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.331-b09, mixed mode)

OS version (e.g. uname -a):
Linux ecs-sps-srv-sit.novalocal 3.10.0-862.el7.x86_64 #1 SMP Wed Mar 21 18:14:51 EDT 2018 x86_64 x86_64 x86_64 GNU/Linux
Windows

[OrezzerO]

HeartBeat is triggered by IdleStateEvent. When a connection reach its idle time , an IdleStateEvent is raised. Please check how many connection is created between client and server . If there are more than one connection, multiple hearbeat will be send.

[tongtaodragon]

Thanks for the answer! In our implementation, client only create one connection to server, we used netstat for confirmation.

[OrezzerO]

In the condition you say, there may be more than one IdleStateEvent is raised or there may be more than one listener is listening. You can use Arthas's stack command to monitor com.alipay.remoting.rpc.HeartbeatHandler#userEventTriggered and related methods like com.alipay.remoting.rpc.protocol.RpcHeartbeatTrigger#heartbeatTriggered

[tongtaodragon]

Thanks OrezzerO!

Using arthas monitor command, heartbeatTriggered shows triggered with 15s frequency and handled with the same thread, this is expected behavior. But the log message in connection-event log is still strange and mislead the analysis. I close this one since the behavior is correct.