Update Aug 25, 2014:
We changed
akka.remote.transport-failure-detector.acceptable-heartbeat-pause = 10 s
instead of 5 s, the WARN message gone. I guess the [Disassociated] WARN
might be caused by network delay or GC pause (Full GC lasts 3+ secs now on
our system) etc. The setting is
akka.remote {
transport-failure-detector {
heartbeat-interval = 30 s # default 4s
acceptable-heartbeat-pause = 10 s # default 10s
}
}
But, that could not explain the periodic "Disassociated" WARN occurred
before, which, seems could not be recovered from Disassociated state.
On Monday, August 11, 2014 12:08:00 AM UTC+8, Caoyuan wrote:
>
> We have an akka cluster with 10 nodes. it works almost smoothly except
> periodic firing "Disassociated" WARN log, which seems cannot be recovered:
>
> The following is the log records.
>
> ......
> 2014-08-10 00:00:09,253 WARN a.remote.ReliableDeliverySupervisor
> akka.tcp://
> [email protected]:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
>
> - Association with remote system [akka.tcp://[email protected]:2552]
> has failed, address is now gated for [5000] ms. Reason is: [Disassociated].
>
> 2014-08-10 00:00:44,292 WARN a.remote.ReliableDeliverySupervisor
> akka.tcp://
> [email protected]:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
>
> - Association with remote system [akka.tcp://[email protected]:2552]
> has failed, address is now gated for [5000] ms. Reason is: [Disassociated].
>
> 2014-08-10 00:01:49,332 WARN a.remote.ReliableDeliverySupervisor
> akka.tcp://
> [email protected]:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
>
> - Association with remote system [akka.tcp://[email protected]:2552]
> has failed, address is now gated for [5000] ms. Reason is: [Disassociated].
>
> 2014-08-10 00:02:24,373 WARN a.remote.ReliableDeliverySupervisor
> akka.tcp://
> [email protected]:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
>
> - Association with remote system [akka.tcp://[email protected]:2552]
> has failed, address is now gated for [5000] ms. Reason is: [Disassociated].
>
> 2014-08-10 00:02:59,412 WARN a.remote.ReliableDeliverySupervisor
> akka.tcp://
> [email protected]:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
>
> - Association with remote system [akka.tcp://[email protected]:2552]
> has failed, address is now gated for [5000] ms. Reason is: [Disassociated].
>
> 2014-08-10 00:03:34,452 WARN a.remote.ReliableDeliverySupervisor
> akka.tcp://
> [email protected]:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
>
> - Association with remote system [akka.tcp://[email protected]:2552]
> has failed, address is now gated for [5000] ms. Reason is: [Disassociated].
> ......
>
>
> The warning continually occurred almost all day, with the period 35
> seconds (30 + 5 s) or 65 seconds (30 + 30 + 5 s), which is exactly the
> setting of akka.remote's transport failure detector:
>
> akka.remote {
>
> transport-failure-detector {
>
> heartbeat-interval = 30 s # default 4s
>
> acceptable-heartbeat-pause = 5 s # default 10s
>
> }
>
> Where, the failure-detector mark it unavailable after heartbeat-interval
> + acceptable-heartbeat-pause period (35 s).
>
> We're using akka-2.3.3. the node which logged is at 10.0.69.169:2551, and
> the remote node is at 10.0.65.3:2552
>
> I tried to dig via the akka.remoting source code, but with no progressing.
>
> Thoughts ?
>
> -Caoyuan Deng
>
>
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