Hi, 

After we updated to the latest 1.2.2 version an error occurs. In detail, 
when, stop and start the docker image, everything works normally, but after 
some time the error occurs at the application.log:


2015-11-09 09:15:02,753 - [ERROR] - from 
org.graylog2.restclient.lib.ApiClient in servernodes-refresh-0 
API call timed out
java.util.concurrent.TimeoutException: null
        at 
com.ning.http.client.providers.netty.future.NettyResponseFuture.get(NettyResponseFuture.java:159)
 
~[com.ning.async-http-client-1.9.31.jar:na]
        at 
org.graylog2.restclient.lib.ApiClientImpl$ApiRequestBuilder.executeOnAll(ApiClientImpl.java:608)
 
~[org.graylog2.graylog2-rest-client--1.2.2-1.2.2.jar:na]
        at 
org.graylog2.restclient.lib.ServerNodesRefreshService.resolveConfiguredNodes(ServerNodesRefreshService.java:97)
 
[org.graylog2.graylog2-rest-client--1.2.2-1.2.2.jar:na]
        at 
org.graylog2.restclient.lib.ServerNodesRefreshService.access$400(ServerNodesRefreshService.java:42)
 
[org.graylog2.graylog2-rest-client--1.2.2-1.2.2.jar:na]
        at 
org.graylog2.restclient.lib.ServerNodesRefreshService$1.run(ServerNodesRefreshService.java:126)
 
[org.graylog2.graylog2-rest-client--1.2.2-1.2.2.jar:na]
        at 
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) 
[na:1.8.0_60]
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) 
[na:1.8.0_60]
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
 
[na:1.8.0_60]
        at 
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
 
[na:1.8.0_60]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
[na:1.8.0_60]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
[na:1.8.0_60]
        at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60]



I am using the same node-id and server-secret, after upgrading to  the last 
version.  I can not figure out what this error is about.  
I suppose that is because i updated to the newest version 1.2.2 of graylog. 
Maybe it is necessary to delete all the data (as still I am working on a 
testing environment), but I would like to make sure that the same problem 
not happens when on production in the future.

The configuration I am using for the docker graylog instance is 
"GRAYLOG_RETENTION="--size=3 --indices=10" -e ES_MEMORY=2g". Not sure if it 
is proper, to use "--indices=10", as I am using "Minimum Graylog setup."



Thank you in advance for your help,
Lefteris.

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