[jira] [Commented] (ZOOKEEPER-2332) Zookeeper failed to start for empty txn log

["Raul Gutierrez Segales (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15043513#comment-15043513 ] 

Raul Gutierrez Segales commented on ZOOKEEPER-2332:
---------------------------------------------------

[~liushaohui]: how did the empty txnlog happened in the first place? I am bit worried that by doing this we might introduce inconsistencies... If a txnlog is corrupted, we should just give up.

[~fpj], [~rakeshr]: thoughts?

> Zookeeper failed to start for empty txn log
> -------------------------------------------
>
>                 Key: ZOOKEEPER-2332
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2332
>             Project: ZooKeeper
>          Issue Type: Bug
>    Affects Versions: 3.4.6
>            Reporter: Liu Shaohui
>            Priority: Critical
>             Fix For: 3.6.0
>
>         Attachments: ZOOKEEPER-2332-v001.diff
>
>
> We found that the zookeeper server with version 3.4.6 failed to start for there is a empty txn log in log dir.  
> I think we should skip the empty log file during restoring the datatree. 
> Any suggestion?
> {code}
> 2015-11-27 19:16:16,887 [myid:] - ERROR [main:ZooKeeperServerMain@63] - Unexpected exception, exiting abnormally
> java.io.EOFException
> at java.io.DataInputStream.readInt(DataInputStream.java:392)
> at org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63)
> at org.apache.zookeeper.server.persistence.FileHeader.deserialize(FileHeader.java:64)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.inStreamCreated(FileTxnLog.java:576)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.createInputArchive(FileTxnLog.java:595)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.goToNextLog(FileTxnLog.java:561)
> at org.apache.zookeeper.server.persistence.FileTxnLog$FileTxnIterator.next(FileTxnLog.java:643)
> at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:158)
> at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:223)
> at org.apache.zookeeper.server.ZooKeeperServer.loadData(ZooKeeperServer.java:272)
> at org.apache.zookeeper.server.ZooKeeperServer.startdata(ZooKeeperServer.java:399)
> at org.apache.zookeeper.server.NIOServerCnxnFactory.startup(NIOServerCnxnFactory.java:122)
> at org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:113)
> at org.apache.zookeeper.server.ZooKeeperServerMain.initializeAndRun(ZooKeeperServerMain.java:86)
> at org.apache.zookeeper.server.ZooKeeperServerMain.main(ZooKeeperServerMain.java:52)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116)
> at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:78)
> {code}



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