[jira] [Commented] (ZOOKEEPER-2809) Unnecessary stack-trace in server when the client disconnect unexpectedly

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16192100#comment-16192100 ] 

ASF GitHub Bot commented on ZOOKEEPER-2809:
-------------------------------------------

Github user mfenes closed the pull request at:

    https://github.com/apache/zookeeper/pull/355


> Unnecessary stack-trace in server when the client disconnect unexpectedly
> -------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2809
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2809
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.4.8
>            Reporter: Paul Millar
>            Assignee: Mark Fenes
>            Priority: Minor
>             Fix For: 3.4.11
>
>
> In ZK 3.4.x, if the client disconnects unexpectedly then the server logs this with a stack-trace (see src/java/main/org/apache/zookeeper/server/NIOServerCnxn.java:356).
> This is unfortunate as we are using an embedded ZK server in our project (in a test environment) and we consider all stack-traces as bugs.
> I noticed that ZK 3.5 and later no longer log a stack-trace.  This change is due to commit 6206b495 (in branch-3.5), which adds ZOOKEEPER-1504 and seems to fix this issue almost as a side-effect; a similar change in master has the same effect.
> I was wondering if the change in how EndOfStreamException is logged (i.e., logging the message without a stack-trace) could be back-ported to 3.4 branch, so could be included in the next 3.4 release.



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