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https://issues.apache.org/jira/browse/ZOOKEEPER-1264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13143232#comment-13143232
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Benjamin Reed commented on ZOOKEEPER-1264:
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yeah, the observers (as far as my understanding from the code) don't really log
transactions and they only get INFORMs no PROPOSALs.
we can start writing the transactions after the newleader message and i looked
at doing that. the code just got a little to complicated for very little
benefit. all the proposals up to the uptodate are already committed, so we
aren't waiting on an ack. and we would have to move to writing out the pending
proposals until after the newleader or uptodate (for backwards compatibility)
and then check if have already started writing in the PROPOSAL handling. it
just seemed simpler to wait until the end and do it all at once.
> FollowerResyncConcurrencyTest failing intermittently
> ----------------------------------------------------
>
> Key: ZOOKEEPER-1264
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1264
> Project: ZooKeeper
> Issue Type: Bug
> Components: tests
> Affects Versions: 3.3.3, 3.4.0, 3.5.0
> Reporter: Patrick Hunt
> Assignee: Camille Fournier
> Priority: Blocker
> Fix For: 3.3.4, 3.4.0, 3.5.0
>
> Attachments: ZOOKEEPER-1264-merge.patch, ZOOKEEPER-1264.patch,
> ZOOKEEPER-1264.patch, ZOOKEEPER-1264.patch, ZOOKEEPER-1264.patch,
> ZOOKEEPER-1264_branch33.patch, ZOOKEEPER-1264_branch34.patch,
> ZOOKEEPER-1264unittest.patch, ZOOKEEPER-1264unittest.patch,
> followerresyncfailure_log.txt.gz, logs.zip, tmp.zip
>
>
> The FollowerResyncConcurrencyTest test is failing intermittently.
> saw the following on 3.4:
> {noformat}
> junit.framework.AssertionFailedError: Should have same number of
> ephemerals in both followers expected:<11741> but was:<14001>
> at
> org.apache.zookeeper.test.FollowerResyncConcurrencyTest.verifyState(FollowerResyncConcurrencyTest.java:400)
> at
> org.apache.zookeeper.test.FollowerResyncConcurrencyTest.testResyncBySnapThenDiffAfterFollowerCrashes(FollowerResyncConcurrencyTest.java:196)
> at
> org.apache.zookeeper.JUnit4ZKTestRunner$LoggedInvokeMethod.evaluate(JUnit4ZKTestRunner.java:52)
> {noformat}
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