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Posted to dev@zookeeper.apache.org by "Patrick Hunt (JIRA)" <ji...@apache.org> on 2014/07/21 20:40:40 UTC
[jira] [Comment Edited] (ZOOKEEPER-1789) 3.4.x observer causes NPE
on 3.5.0 (trunk) participants
[ https://issues.apache.org/jira/browse/ZOOKEEPER-1789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14069014#comment-14069014 ]
Patrick Hunt edited comment on ZOOKEEPER-1789 at 7/21/14 6:39 PM:
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What's with the "sleep(1000)" in the test? (as well as some pretty low timeouts for other statements in that same test) That's usually a red flag. - meaning that tends to cause flakey tests on slow/underprovisioned hardware.
was (Author: phunt):
What's with the "sleep(1000)" in the test? That's usually a red flag. - meaning that tends to cause flakey tests on slow/underprovisioned hardware.
> 3.4.x observer causes NPE on 3.5.0 (trunk) participants
> -------------------------------------------------------
>
> Key: ZOOKEEPER-1789
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1789
> Project: ZooKeeper
> Issue Type: Bug
> Affects Versions: 3.5.0
> Reporter: Raul Gutierrez Segales
> Assignee: Alexander Shraer
> Priority: Critical
> Fix For: 3.5.0
>
> Attachments: ZOOKEEPER-1789.patch, ZOOKEEPER-1789.patch
>
>
> (assigning to Alex because this was introduced by ZOOKEEPER-107, but will upload a patch as well.)
> I have a 5 participants cluster running what will be 3.5.0 (i.e.: trunk as of today) and an observer running 3.4 (trunk from 3.4 branch). When the observer tries to establish a connection to the participants I get:
> {noformat}
> Thread Thread[10.40.78.121:3888,5,main] died java.lang.NullPointerException at org.apache.zookeeper.server.quorum.QuorumCnxManager.receiveConnection(QuorumCnxManager.java:240)
> at org.apache.zookeeper.server.quorum.QuorumCnxManager$Listener.run(QuorumCnxManager.java:552)
> {noformat}
> Looking at QuorumCnxManager.java:240:
> {noformat}
> if (protocolVersion >= 0) { // this is a server id and not a protocol version
> sid = protocolVersion;
> electionAddr = self.getVotingView().get(sid).electionAddr;
> } else {
> {noformat}
> and self.getVotingView().get(sid) will be null for Observers. So this block should cover that case.
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