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https://issues.apache.org/jira/browse/ZOOKEEPER-2618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15603037#comment-15603037
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wu wen commented on ZOOKEEPER-2618:
-----------------------------------
Yes, this is the same problem, I just try to create a subtask to fix it.
> fix ClassNotFoundException on shutdown of client
> ------------------------------------------------
>
> Key: ZOOKEEPER-2618
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2618
> Project: ZooKeeper
> Issue Type: Sub-task
> Components: java client
> Affects Versions: 3.4.9
> Reporter: wu wen
> Priority: Minor
> Fix For: 3.4.10
>
> Attachments: ZOOKEEPER-2618.patch
>
>
> see ZOOKEEPER-1394,We also have this issue.
> 2016-10-21 13:17:21.618 ERROR
> localhost-startStop-1-SendThread(172.21.134.7:2005) ClientCnxn:414 - from
> localhost-startStop-1-SendThread(172.21.134.7:2005)
> java.lang.NoClassDefFoundError: org/apache/zookeeper/server/ZooTrace
> at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1128)
> Caused by: java.lang.ClassNotFoundException: Illegal access: this web
> application instance has been stopped already. Could not load
> [org.apache.zookeeper.server.ZooTrace]. The following stack trace is thrown
> for debugging purposes as well as to attempt to terminate the thread which
> caused the illegal access.
> at
> org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1315)
> at
> org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1178)
> at
> org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1139)
> ... 1 more
> Caused by: java.lang.IllegalStateException: Illegal access: this web
> application instance has been stopped already. Could not load
> [org.apache.zookeeper.server.ZooTrace]. The following stack trace is thrown
> for debugging purposes as well as to attempt to terminate the thread which
> caused the illegal access.
> at
> org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1325)
> at
> org.apache.catalina.loader.WebappClassLoaderBase.checkStateForClassLoading(WebappClassLoaderBase.java:1313)
> ... 3 more
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