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https://issues.apache.org/jira/browse/ZOOKEEPER-1561?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13539176#comment-13539176
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Jacky007 commented on ZOOKEEPER-1561:
-------------------------------------
It was fixed in ZOOKEEPER-1560.
> Zookeeper client may hang on a server restart
> ---------------------------------------------
>
> Key: ZOOKEEPER-1561
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1561
> Project: ZooKeeper
> Issue Type: Bug
> Components: java client
> Affects Versions: 3.5.0
> Reporter: Jacky007
> Fix For: 3.5.0
>
>
> In the doIO method of ClientCnxnSocketNIO
> {noformat}
> if (p != null) {
> outgoingQueue.removeFirstOccurrence(p);
> updateLastSend();
> if ((p.requestHeader != null) &&
> (p.requestHeader.getType() != OpCode.ping) &&
> (p.requestHeader.getType() != OpCode.auth)) {
> p.requestHeader.setXid(cnxn.getXid());
> }
> p.createBB();
> ByteBuffer pbb = p.bb;
> sock.write(pbb);
> if (!pbb.hasRemaining()) {
> sentCount++;
> if (p.requestHeader != null
> && p.requestHeader.getType() != OpCode.ping
> && p.requestHeader.getType() != OpCode.auth) {
> pending.add(p);
> }
> }
> {noformat}
> When the sock.write(pbb) method throws an exception, the packet will not be
> cleanup(not in outgoingQueue nor in pendingQueue). If the client wait for it,
> it will wait forever...
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