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https://issues.apache.org/jira/browse/ZOOKEEPER-2973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16349931#comment-16349931
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wuyiyun commented on ZOOKEEPER-2973:
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Yes, that is one reason and easy to resolve. But i know that even if i send  
length of data just no more than one hundred byte, once enabled ssl capability, 
several hours later, just zookeeper leader node will get this exception.

 I met OutOfMemory error cause zookeeper shutdown. and restart not ok.

   1.   Maybe the client write too much too the ZooKeeper, which bigger than 
the  jute.maxbuffer

> "Unreasonable length" exception 
> --------------------------------
>
>                 Key: ZOOKEEPER-2973
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2973
>             Project: ZooKeeper
>          Issue Type: Bug
>    Affects Versions: 3.4.6
>            Reporter: wanggang_123
>            Priority: Blocker
>
> I am running a three node ZooKeeper cluster. At 2018-01-28 17:56:30,leader 
> node has error log:
> 2018-01-28 17:56:30 
> [UTC:20180128T175630+0800]|ERROR||LearnerHandler-/118.123.180.23:44836hread|Coordination
>  > Unexpected exception causing shutdown while sock still open 
> (LearnerHandler.java:633)
> java.io.IOException: Unreasonable length = 1885430131
>  at org.apache.jute.BinaryInputArchive.readBuffer(BinaryInputArchive.java:95)
>  at 
> org.apache.zookeeper.server.quorum.QuorumPacket.deserialize(QuorumPacket.java:85)
>  at org.apache.jute.BinaryInputArchive.readRecord(BinaryInputArchive.java:103)
>  at 
> org.apache.zookeeper.server.quorum.LearnerHandler.run(LearnerHandler.java:546)
> 2018-01-28 17:56:30 [UTC:20180128T175630+0800]|WARN 
> ||LearnerHandler-/118.123.180.23:44836hread|Coordination > ******* GOODBYE 
> /118.123.180.23:44836 ******** (LearnerHandler.java:646)
> 2018-01-28 17:56:30 [UTC:20180128T175630+0800]|INFO ||ProcessThread(sid:2 
> cport:-1):hread|Coordination > Got user-level KeeperException when processing 
> sessionid:0x16138593ad43cf9 type:delete cxid:0x5 zxid:0xc104b59e9 txntype:-1 
> reqpath:n/a Error 
> Path:/VSP/Leader/syncScore-0/_c_9101a3d6-f431-4792-b71d-a493e938895d-latch-0000093037
>  Error:KeeperErrorCode = NoNode for 
> /VSP/Leader/syncScore-0/_c_9101a3d6-f431-4792-b71d-a493e938895d-latch-0000093037
>  (PrepRequestProcessor.java:645)



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