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https://issues.apache.org/jira/browse/HBASE-2645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-2645:
-------------------------
Attachment: 2645v4.txt
Cleaned up patch. Reenables the test and does some refactoring so different
filesystems running pseudo master and regionserver threads.
Ran it locally ten times and passes.
> HLog writer can do 1-2 sync operations after lease has been recovered for
> split process.
> ----------------------------------------------------------------------------------------
>
> Key: HBASE-2645
> URL: https://issues.apache.org/jira/browse/HBASE-2645
> Project: HBase
> Issue Type: Bug
> Components: Filters
> Affects Versions: 0.90.4
> Reporter: Cosmin Lehene
> Assignee: Todd Lipcon
> Priority: Blocker
> Fix For: 0.96.0
>
> Attachments: 2645_hacking.txt, 2645.txt, 2645v2.txt, 2645v3.txt,
> 2645v4.txt, hdfs_1.0_editswriter_recoverlease.txt,
> hdfs_trunk_editswriter_recoverlease.txt,
> org.apache.hadoop.hbase.regionserver.wal.TestHLogSplit-output.txt,
> org.apache.hadoop.hbase.regionserver.wal.TestHLogSplit-output.txt
>
>
> TestHLogSplit.testLogCannotBeWrittenOnceParsed is failing.
> This test starts a thread that writes one edit to the log, syncs and counts.
> During this, a HLog.splitLog operation is started. splitLog recovers the log
> lease before reading the log, so that the original regionserver could not
> wake up and write after the split process started.
> The test compares the number of edits reported by the split process and by
> the writer thread. Writer thread (called zombie in the test) should report <=
> than the splitLog (sync() might raise after the last edit gets written and
> the edit won't get counted by zombie thread). However it appears that the
> zombie counts 1-2 more edits. So it looks like it can sync without a lease.
> This might be a hdfs-0.20 related issue.
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