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From "Jordan Zimmerman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CURATOR-325) Background retry falls into infinite loop of SessionExpiredException
Date Fri, 06 Oct 2017 14:23:00 GMT

    [ https://issues.apache.org/jira/browse/CURATOR-325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16194646#comment-16194646
] 

Jordan Zimmerman commented on CURATOR-325:
------------------------------------------

As I said, we need a test case and, ideally, a Pull Request with the fix.

> Background retry falls into infinite loop of SessionExpiredException
> --------------------------------------------------------------------
>
>                 Key: CURATOR-325
>                 URL: https://issues.apache.org/jira/browse/CURATOR-325
>             Project: Apache Curator
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 2.9.1, 2.10.0
>         Environment: sun java jdk 1.7.0_55, curator 2.9.1, zookeeper 3.4.6
>            Reporter: clive du
>              Labels: SessionExpiredException, loop
>
> after long time gc pause,which longer than zookeeper session time,the zookeeper cluster
invalidate the session id holding by the client and waiting the client to reconnect,but client
consider the  SessionExpiredException as retry exception and re-put to the background queue,so
wo get the stacktrace infinitely.
> 12:50:54.337 [configuration-0-EventThread] DEBUG org.apache.curator.RetryLoop - Retrying
operation
> 12:50:54.337 [configuration-0-EventThread] DEBUG org.apache.curator.RetryLoop - Retry-able
exception received
> org.apache.zookeeper.KeeperException$SessionExpiredException: KeeperErrorCode = Session
expired for /dynamic/apps/258741001/DEV
>     at org.apache.zookeeper.KeeperException.create(KeeperException.java:127) ~[zookeeper-3.4.6.jar:3.4.6-1569965]
>     at org.apache.zookeeper.KeeperException.create(KeeperException.java:51) ~[zookeeper-3.4.6.jar:3.4.6-1569965]
>     at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:1155) ~[zookeeper-3.4.6.jar:3.4.6-1569965]
>     at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:304)
~[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.GetDataBuilderImpl$4.call(GetDataBuilderImpl.java:293)
~[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:108) ~[curator-client-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.GetDataBuilderImpl.pathInForeground(GetDataBuilderImpl.java:290)
[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.GetDataBuilderImpl.forPath(GetDataBuilderImpl.java:281)
[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.GetDataBuilderImpl$1.forPath(GetDataBuilderImpl.java:105)
[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.GetDataBuilderImpl$1.forPath(GetDataBuilderImpl.java:65)
[curator-framework-2.10.0.jar:na]
>     at com.ctrip.flight.configuration.client.AbstractZookeeperClient.getData(AbstractZookeeperClient.java:68)
[classes/:na]
>     at com.ctrip.flight.configuration.client.ZooKeeperConfigurationSource.getPublishNodeValue(ZooKeeperConfigurationSource.java:258)
[classes/:na]
>     at com.ctrip.flight.configuration.client.ZooKeeperConfigurationSource.access$100(ZooKeeperConfigurationSource.java:45)
[classes/:na]
>     at com.ctrip.flight.configuration.client.ZooKeeperConfigurationSource$1.nodeChanged(ZooKeeperConfigurationSource.java:105)
[classes/:na]
>     at org.apache.curator.framework.recipes.cache.NodeCache$4.apply(NodeCache.java:310)
[curator-recipes-2.10.0.jar:na]
>     at org.apache.curator.framework.recipes.cache.NodeCache$4.apply(NodeCache.java:304)
[curator-recipes-2.10.0.jar:na]
>     at org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:93)
[curator-framework-2.10.0.jar:na]
>     at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:310)
[guava-19.0.jar:na]
>     at org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:85)
[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.framework.recipes.cache.NodeCache.setNewData(NodeCache.java:302)
[curator-recipes-2.10.0.jar:na]
>     at org.apache.curator.framework.recipes.cache.NodeCache.processBackgroundResult(NodeCache.java:269)
[curator-recipes-2.10.0.jar:na]
>     at org.apache.curator.framework.recipes.cache.NodeCache.access$300(NodeCache.java:56)
[curator-recipes-2.10.0.jar:na]
>     at org.apache.curator.framework.recipes.cache.NodeCache$3.processResult(NodeCache.java:122)
[curator-recipes-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.CuratorFrameworkImpl.sendToBackgroundCallback(CuratorFrameworkImpl.java:749)
[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.CuratorFrameworkImpl.processBackgroundOperation(CuratorFrameworkImpl.java:522)
[curator-framework-2.10.0.jar:na]
>     at org.apache.curator.framework.imps.GetDataBuilderImpl$3.processResult(GetDataBuilderImpl.java:256)
[curator-framework-2.10.0.jar:na]
>     at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:561)
[zookeeper-3.4.6.jar:3.4.6-1569965]
>     at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498) [zookeeper-3.4.6.jar:3.4.6-1569965]



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