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Zookeeper, mail # user - NullPointerException in FileTxnsnapLog.processTransaction (ZK 3.4.1)


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Jeremy Stribling 2011-12-19, 22:48
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Andrew McNair 2011-12-20, 01:28
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Re: NullPointerException in FileTxnsnapLog.processTransaction (ZK 3.4.1)
Mahadev Konar 2011-12-20, 01:49
Thanks Andrew. This seems like a blocker.

Waiting for the patch :).

thanks
mahadev

On Mon, Dec 19, 2011 at 5:28 PM, Andrew McNair <[EMAIL PROTECTED]>wrote:

> Sorry, I'd missed this message. I just created ZOOKEEPER-1333 for the
> same issue.
>
> -Andrew
>
> On Mon, Dec 19, 2011 at 2:48 PM, Jeremy Stribling <[EMAIL PROTECTED]>
> wrote:
> > I'm seeing a NullPointerException in ZK 3.4.1, and it seems to usually
> > happen when I restart a server from standalone mode into quorum mode.  It
> > doesn't happen every time, but I can reproduce it pretty reliably in my
> > tests:
> >
> > 2011-12-19 14:33:04,036 2195 [pool-1-thread-2] INFO
> > org.apache.zookeeper.server.quorum.QuorumPeer  - tickTime set to 3000
> > 2011-12-19 14:33:04,036 2195 [pool-1-thread-2] INFO
> > org.apache.zookeeper.server.quorum.QuorumPeer  - initLimit set to 5
> > 2011-12-19 14:33:04,038 2197 [pool-1-thread-2] INFO
> > org.apache.zookeeper.server.persistence.FileSnap  - Reading snapshot
> > <zkdir>/version-2/snapshot.0
> > 2011-12-19 14:33:04,040 2199 [pool-1-thread-2] DEBUG
> > org.apache.zookeeper.server.persistence.FileTxnLog  - Created new input
> > stream <zkdir>/version-2/log.1
> > 2011-12-19 14:33:04,041 2200 [pool-1-thread-2] DEBUG
> > org.apache.zookeeper.server.persistence.FileTxnLog  - Created new input
> > archive <zkdir>/version-2/log.1
> > 2011-12-19 14:33:04,041 2200 [pool-1-thread-2] DEBUG
> > org.apache.zookeeper.server.DataTree  - Ignoring processTxn failure hdr:
> -1
> > : error: -101
> > java.lang.NullPointerException
> >        at
> >
> org.apache.zookeeper.server.persistence.FileTxnSnapLog.processTransaction(FileTxnSnapLog.java:203)
> >        at
> >
> org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:150)
> >        at
> > org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:223)
> >        at
> >
> org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:418)
> >        at
> > org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:410)
> >        at
> > com.nicira.onix.zookeeper.Zookeeper.StartZookeeper(Zookeeper.java:203)
> >        at
> > com.nicira.onix.zookeeper.Zookeeper.RestartZookeeper(Zookeeper.java:282)
> >        at
> com.nicira.onix.zookeeper.ZKRPCService.setServers(ZKRPC.java:83)
> >        at
> > com.nicira.onix.zookeeper.Zkrpc$ZKRPCService.callMethod(Zkrpc.java:8487)
> >        at com.nicira.onix.rpc.RPC$10.run(RPC.java:534)
> >        at
> >
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> >        at
> >
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> >        at java.lang.Thread.run(Thread.java:636)
> >
> > (Note that I've replaced my zookeeper directory in the message above with
> > <zkdir> for readability.)
> >
> > It appears to be a problem in the on-disk data, since if I then try
> starting
> > up a standalone server with the same directory, I get the same error.
>  I've
> > attached a tarball containing the version-2 directory that demonstrates
> the
> > problem.
> >
> > If folks think this is a real problem in supported Zookeeper
> configurations,
> > I'll happily open a JIRA.
> >
> > Jeremy
> >
>
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Andrew McNair 2011-12-20, 02:16