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https://issues.apache.org/jira/browse/ZOOKEEPER-1156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13096631#comment-13096631
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Hudson commented on ZOOKEEPER-1156:
-----------------------------------
Integrated in ZooKeeper-trunk #1293 (See
[https://builds.apache.org/job/ZooKeeper-trunk/1293/])
ZOOKEEPER-1154, ZOOKEEPER-1156:
Data inconsistency when the node(s) with the highest zxid is not present at the
time of leader election
Log truncation truncating log too much - can cause data loss
Vishal Kathuria via camille
camille :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1164758
Files :
* /zookeeper/trunk/CHANGES.txt
*
/zookeeper/trunk/src/java/main/org/apache/zookeeper/server/persistence/FileTxnLog.java
*
/zookeeper/trunk/src/java/main/org/apache/zookeeper/server/quorum/LearnerHandler.java
*
/zookeeper/trunk/src/java/test/org/apache/zookeeper/server/quorum/QuorumPeerMainTest.java
> Log truncation truncating log too much - can cause data loss
> ------------------------------------------------------------
>
> Key: ZOOKEEPER-1156
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1156
> Project: ZooKeeper
> Issue Type: Bug
> Components: quorum, server
> Affects Versions: 3.3.3
> Reporter: Vishal Kathuria
> Assignee: Vishal Kathuria
> Priority: Blocker
> Fix For: 3.3.4, 3.4.0
>
> Attachments: ZOOKEEPER-1156.patch
>
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> The log truncation relies on position calculation for a particular zxid to
> figure out the new size of the log file. There is a bug in
> PositionInputStream implementation which skips counting the bytes in the log
> which have value 0. This can lead to underestimating the actual log size. The
> log records which should be there can get truncated, leading to data loss on
> the participant which is executing the trunc.
> Clients can see different values depending on whether they connect to the
> node on which trunc was executed.
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