FAQ

On Mon, Aug 11, 2014 at 6:21 PM, Patrik Nordwall wrote:

Hi Caoyuan,

Do you see the same thing with Akka version 2.3.4 and changing
the transport-failure-detector settings to default?
Will try. But I don't see any relevance source changes between 2.3.3 and
2.3.4

Regards,
Patrik


On Sun, Aug 10, 2014 at 6:08 PM, 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://
ClusterSystem@10.0.69.169:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
- Association with remote system [akka.tcp://ClusterSystem@10.0.65.3:2552]
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://
ClusterSystem@10.0.69.169:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
- Association with remote system [akka.tcp://ClusterSystem@10.0.65.3:2552]
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://
ClusterSystem@10.0.69.169:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
- Association with remote system [akka.tcp://ClusterSystem@10.0.65.3:2552]
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://
ClusterSystem@10.0.69.169:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
- Association with remote system [akka.tcp://ClusterSystem@10.0.65.3:2552]
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://
ClusterSystem@10.0.69.169:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
- Association with remote system [akka.tcp://ClusterSystem@10.0.65.3:2552]
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://
ClusterSystem@10.0.69.169:2551/system/endpointManager/reliableEndpointWriter-akka.tcp%3A%2F%2FClusterSystem%4010.0.65.3%3A2552-5
- Association with remote system [akka.tcp://ClusterSystem@10.0.65.3:2552]
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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--

Patrik Nordwall
Typesafe <http://typesafe.com/> - Reactive apps on the JVM
Twitter: @patriknw

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