Hello, I am facing also the issues with the delayed heartbeats. It is very strange because it is happening even without load. I created a repo, which you can use to reproduce it. Link : https://github.com/CostasChaitas/Akka-Demo
Any help would be much appreciated. Th On Sunday, 28 May 2017 12:32:25 UTC+2, Patrik Nordwall wrote: > > It can be many reasons for delayed heartbeat messages. > > - GC. Enable gc logging and try to correlate. > - Slow serialization/deserialization of your application messages, > especially if you send many messages in a burst > - Running blocking actors/tasks on the default dispatcher > > /Patrik > tors 25 maj 2017 kl. 13:58 skrev Yutao Shuai <[email protected] > <javascript:>>: > >> We have a 3 nodes cluster （157,158 and 159）, we send 4000 messages per >> seconds to 158 in 157, sometimes 157 can not receive the heartbeat from >> 158, but 158 is already sended. The heartbeat between 159 and 158 is fine, >> and 157-159 also ok. Our version is akka2.3.10, and we want to solve this >> problem in 2.3.10, we will upgrade to 2.4.18 soon. >> >> Here is the log of heartbeat, we add a log when receive heartbeat. >> This is 157 log, as we can see, 157 can not receive the heartbeat from >> 158 since 20:59:15,985 until 20:59:32,558, Heartbeat is not lost but delay >> >> >> 2017-05-23 20:59:07,516 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:08,601 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:11,824 | DEBUG | t-dispatcher-852 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:13,004 | DEBUG | lt-dispatcher-29 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:13,166 | DEBUG | t-dispatcher-853 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:13,273 | DEBUG | t-dispatcher-853 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:14,287 | DEBUG | t-dispatcher-853 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:15,853 | DEBUG | t-dispatcher-853 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:15,985 | DEBUG | t-dispatcher-852 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:32,558 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:32,612 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:32,632 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:32,831 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:32,910 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:32,982 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:32,987 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,059 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,101 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,170 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,175 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,190 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,224 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,226 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,269 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,302 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,348 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:33,369 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:34,221 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> 2017-05-23 20:59:34,603 | DEBUG | ult-dispatcher-2 | >> ClusterHeartbeatReceiver |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Received Heartbeat from akka.tcp:// >> [email protected]:2551 >> >> >> >> Here is 158 log, We can confirm that the heartbeat has been sent >> successfully >> >> >> 2017-05-23 20:59:15,265 | DEBUG | -dispatcher-2409 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:16,266 | DEBUG | -dispatcher-2398 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:17,266 | DEBUG | -dispatcher-2409 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:18,265 | DEBUG | -dispatcher-2398 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:19,265 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:20,265 | DEBUG | ult-dispatcher-3 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:21,266 | DEBUG | -dispatcher-2398 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:22,287 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:23,265 | DEBUG | -dispatcher-2398 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:24,265 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:25,265 | DEBUG | -dispatcher-2409 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:26,266 | DEBUG | -dispatcher-2398 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:27,265 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:28,265 | DEBUG | -dispatcher-2398 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:29,265 | DEBUG | -dispatcher-2409 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:30,266 | DEBUG | -dispatcher-2398 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:31,265 | DEBUG | -dispatcher-2409 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:32,265 | DEBUG | -dispatcher-2409 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:33,266 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:34,265 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:35,266 | DEBUG | -dispatcher-2405 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:36,270 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:37,265 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:38,266 | DEBUG | -dispatcher-2408 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:39,265 | DEBUG | -dispatcher-2408 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:40,265 | DEBUG | -dispatcher-2405 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:41,265 | DEBUG | -dispatcher-2405 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:42,265 | DEBUG | -dispatcher-2408 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> 2017-05-23 20:59:43,265 | DEBUG | -dispatcher-2401 | >> ClusterHeartbeatSender |apply$mcV$sp() 77 | >> com.typesafe.akka.slf4j | Cluster Node [akka.tcp:// >> [email protected]:2551] - Heartbeat to [akka.tcp:// >> [email protected]:2551] >> >> -- >> >>>>>>>>>> Read the docs: http://akka.io/docs/ >> >>>>>>>>>> Check the FAQ: >> http://doc.akka.io/docs/akka/current/additional/faq.html >> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user >> --- >> You received this message because you are subscribed to the Google Groups >> "Akka User List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at https://groups.google.com/group/akka-user. >> For more options, visit https://groups.google.com/d/optout. >> > -- 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