[jira] [Commented] (HBASE-14987) HBaseFsck#mergeRegionDirs() needs to handle compaction marker in recovered edits

["Ted Yu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-14987?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059194#comment-15059194 ] 

Ted Yu commented on HBASE-14987:
--------------------------------

Approaches I can think of:
1. rewrite compaction marker so that it matches the new region
2. annotate the recovered edits so that log replay can understand the transition for the compaction marker and handle it properly

> HBaseFsck#mergeRegionDirs() needs to handle compaction marker in recovered edits
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-14987
>                 URL: https://issues.apache.org/jira/browse/HBASE-14987
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>
> One customer encountered the following error when replaying recovered edits, leading to region open failure:
> {code}
> region=table1,d6b-2282-9223370590058224807-U-9856557-        EJ452727-16313786400171,1449616291799.fa8a526f2578eb3630bb08a4b1648f5d., starting to roll back the global memstore   size.
> org.apache.hadoop.hbase.regionserver.WrongRegionException: Compaction marker from WAL table_name: "table1"
> encoded_region_name: "d389c70fde9ec07971d0cfd20ef8f575"
> ...
> region_name: "table1,d6b-2282-9223370590058224807-U-9856557-EJ452727-16313786400171,1449089609367.d389c70fde9ec07971d0cfd20ef8f575."
>  targetted for region d389c70fde9ec07971d0cfd20ef8f575 does not match this region: {ENCODED => fa8a526f2578eb3630bb08a4b1648f5d, NAME => 'table1,d6b-2282-                        9223370590058224807-U-9856557-EJ452727-16313786400171,1449616291799.fa8a526f2578eb3630bb08a4b1648f5d.', STARTKEY => 'd6b-2282-9223370590058224807-U-9856557-EJ452727-             16313786400171', ENDKEY => 'd76-2553-9223370588576178807-U-7416904-EK875822-17662180600000'}
>   at org.apache.hadoop.hbase.regionserver.HRegion.checkTargetRegion(HRegion.java:4592)
>   at org.apache.hadoop.hbase.regionserver.HRegion.replayWALCompactionMarker(HRegion.java:3831)
>   at org.apache.hadoop.hbase.regionserver.HRegion.replayRecoveredEdits(HRegion.java:3747)
>   at org.apache.hadoop.hbase.regionserver.HRegion.replayRecoveredEditsIfAny(HRegion.java:3601)
>   at org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionStores(HRegion.java:911)
>   at org.apache.hadoop.hbase.regionserver.HRegion.initializeRegionInternals(HRegion.java:789)
>   at org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:762)
>   at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:5774)
>   at org.apache.hadoop.hbase.regionserver.HRegion.openHRegion(HRegion.java:5744)
> {code}
> This was likely caused by the following action of hbck:
> {code}
> 15/12/08 18:11:34 INFO util.HBaseFsck: [hbasefsck-pool1-t37] Moving files from hdfs://Zealand/hbase/data/default/table1/d389c70fde9ec07971d0cfd20ef8f575/recovered.edits into     containing region hdfs://Zealand/hbase/data/default/table1/fa8a526f2578eb3630bb08a4b1648f5d/recovered.edits
> {code}
> The recovered.edits for d389c70fde9ec07971d0cfd20ef8f575 contained compaction marker which couldn't be replayed against fa8a526f2578eb3630bb08a4b1648f5d



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