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https://issues.apache.org/jira/browse/ZOOKEEPER-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13408996#comment-13408996
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Flavio Junqueira commented on ZOOKEEPER-1453:
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We force it to disk, so if the disk write cache is disabled, then force
returning successfully is an indication that it has been written to media. The
observation about the OS buffers only holds if we don't sync to disk.
I checked the files in the previous tar.gz without the traces, but I couldn't
spot anything suspicious. I'll look into the last batch uploaded. Please don't
delete old files.
> corrupted logs may not be correctly identified by FileTxnIterator
> -----------------------------------------------------------------
>
> Key: ZOOKEEPER-1453
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1453
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.3.3
> Reporter: Patrick Hunt
> Priority: Critical
> Attachments: 10.10.5.123-withPath1489.tar.gz, 10.10.5.123.tar.gz,
> 10.10.5.42-withPath1489.tar.gz, 10.10.5.42.tar.gz,
> 10.10.5.44-withPath1489.tar.gz, 10.10.5.44.tar.gz
>
>
> See ZOOKEEPER-1449 for background on this issue. The main problem is that
> during server recovery
> org.apache.zookeeper.server.persistence.FileTxnLog.FileTxnIterator.next()
> does not indicate if the available logs are valid or not. In some cases (say
> a truncated record and a single txnlog in the datadir) we will not detect
> that the file is corrupt, vs reaching the end of the file.
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