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https://issues.apache.org/jira/browse/ZOOKEEPER-2549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15640554#comment-15640554
 ] 

ASF GitHub Bot commented on ZOOKEEPER-2549:
-------------------------------------------

Github user rgs1 commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/99#discussion_r86672349
  
    --- Diff: 
src/java/main/org/apache/zookeeper/server/NIOServerCnxnFactory.java ---
    @@ -630,6 +640,22 @@ public static ByteBuffer getDirectBuffer() {
          * limits of the operating system). startup(zks) must be called 
subsequently.
          */
         public NIOServerCnxnFactory() {
    +        String serverCnxnClassName = 
System.getProperty(ServerCnxnFactory.ZOOKEEPER_SERVER_CNXN);
    +        if ( serverCnxnClassName != null ) {
    --- End diff --
    
    nit: extra spaces


> As NettyServerCnxn.sendResponse() allows all the exception to bubble up it 
> can stop main ZK requests processing thread
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2549
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2549
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.5.1
>            Reporter: Yuliya Feldman
>            Assignee: Yuliya Feldman
>         Attachments: ZOOKEEPER-2549-2.patch, ZOOKEEPER-2549-3.patch, 
> ZOOKEEPER-2549-3.patch, ZOOKEEPER-2549.patch, ZOOKEEPER-2549.patch, 
> zookeeper-2549-1.patch
>
>
> As NettyServerCnxn.sendResponse() allows all the exception to bubble up it 
> can stop main ZK requests processing thread and make Zookeeper server look 
> like it is hanging, while it just can not process any request anymore.
> Idea is to catch all the exceptions in NettyServerCnxn.sendResponse() , 
> convert them to IOException and allow it propagating up



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