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https://issues.apache.org/jira/browse/ZOOKEEPER-1794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13825605#comment-13825605
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Hadoop QA commented on ZOOKEEPER-1794:
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+1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12614437/ZOOKEEPER-1794.patch
against trunk revision 1542355.
+1 @author. The patch does not contain any @author tags.
+1 tests included. The patch appears to include 6 new or modified tests.
+1 javadoc. The javadoc tool did not generate any warning messages.
+1 javac. The applied patch does not increase the total number of javac
compiler warnings.
+1 findbugs. The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
+1 release audit. The applied patch does not increase the total number of
release audit warnings.
+1 core tests. The patch passed core unit tests.
+1 contrib tests. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/1786//testReport/
Findbugs warnings:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/1786//artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output:
https://builds.apache.org/job/PreCommit-ZOOKEEPER-Build/1786//console
This message is automatically generated.
> Add hash check to transaction history in quorum servers
> -------------------------------------------------------
>
> Key: ZOOKEEPER-1794
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1794
> Project: ZooKeeper
> Issue Type: Sub-task
> Components: quorum
> Affects Versions: 3.5.0
> Reporter: Germán Blanco
> Assignee: Germán Blanco
> Fix For: 3.5.0
>
> Attachments: ZOOKEEPER-1794.patch, ZOOKEEPER-1794.patch,
> ZOOKEEPER-1794.patch
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> The goal of this task is to add a hash number to each transaction in the
> transaction history. This hash number will depend on the entire transaction
> history. This hash number will be the same in all members of the quorum,
> since it shall have the same result if the members have the same transaction
> history. That means that there will be no need to send any new information
> between members of the quorum, during the broadcast phase. The hash number
> will be checked by the leader when learners try to connect, and it shall also
> be sent together with the snapshot during synchronisation. If the hash number
> does not match, the synchronisation shall be done with a snapshot in order to
> overwrite the conflicts in the transaction history.
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