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https://issues.apache.org/jira/browse/HBASE-20066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16378490#comment-16378490
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Hudson commented on HBASE-20066:
--------------------------------
SUCCESS: Integrated in Jenkins build HBase-Trunk_matrix #4657 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/4657/])
HBASE-20066 Region sequence id may go backward after split or merge (zhangduo:
rev f06a89b5317a8e3d4fb220eb462b083bc6e0b5c8)
* (edit) hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALSplitter.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/MergeTableRegionsProcedure.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/procedure/AbstractStateMachineTableProcedure.java
* (edit) hbase-protocol-shaded/src/main/protobuf/MasterProcedure.proto
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/SplitTableRegionProcedure.java
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/AbstractTestDLS.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
* (add)
hbase-server/src/test/java/org/apache/hadoop/hbase/TestSequenceIdMonotonicallyIncreasing.java
* (add)
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestReadWriteSeqIdFiles.java
> Region sequence id may go backward after split or merge
> -------------------------------------------------------
>
> Key: HBASE-20066
> URL: https://issues.apache.org/jira/browse/HBASE-20066
> Project: HBase
> Issue Type: Bug
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Critical
> Fix For: 2.0.0-beta-2
>
> Attachments: HBASE-20066-v1.patch, HBASE-20066-v2.patch,
> HBASE-20066-v3.patch, HBASE-20066-v4.patch, HBASE-20066.patch
>
>
> The problem is that, now we have markers which will be written to WAL but not
> in store file. For a normal region close, we will write a sequence id file
> under the region directory, and when opening we will use this as the open
> sequence id. But for split and merge, we do not copy the sequence id file to
> the newly generated regions so the sequence id may go backwards since when
> closing the region we will write flush marker and close marker into WAL...
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