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Hudson commented on HBASE-14306: -------------------------------- SUCCESS: Integrated in HBase-1.3-IT #152 (See [https://builds.apache.org/job/HBase-1.3-IT/152/]) HBASE-14306 Refine RegionGroupingProvider: fix issues and make it more scalable (Yu Li) (tedyu: rev 57679278982fc8e6f7cb2d1c31c9aaf636bd57da) * hbase-server/src/test/java/org/apache/hadoop/hbase/wal/IOTestProvider.java * hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestBoundedRegionGroupingStrategy.java * hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.java * hbase-server/src/main/java/org/apache/hadoop/hbase/wal/BoundedGroupingStrategy.java * hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALFactory.java * hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestBoundedRegionGroupingProvider.java * hbase-server/src/main/java/org/apache/hadoop/hbase/wal/DefaultWALProvider.java * hbase-server/src/main/java/org/apache/hadoop/hbase/wal/RegionGroupingProvider.java * hbase-server/src/main/java/org/apache/hadoop/hbase/wal/BoundedRegionGroupingProvider.java * hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALProvider.java * hbase-server/src/main/java/org/apache/hadoop/hbase/wal/DisabledWALProvider.java > Refine RegionGroupingProvider: fix issues and make it more scalable > ------------------------------------------------------------------- > > Key: HBASE-14306 > URL: https://issues.apache.org/jira/browse/HBASE-14306 > Project: HBase > Issue Type: Improvement > Components: wal > Affects Versions: 2.0.0, 1.1.2 > Reporter: Yu Li > Assignee: Yu Li > Fix For: 2.0.0, 1.3.0 > > Attachments: HBASE-14306.branch-1.patch, HBASE-14306.patch, > HBASE-14306_v2.patch, HBASE-14306_v3.patch, HBASE-14306_v3.patch, > HBASE-14306_v4.patch, HBASE-14306_v5.patch > > > There're multiple issues in RegionGroupingProvider, including: > * The provider cache in it is using byte array as the key of > ConcurrentHashMap, which is not right (the reason is > [here|http://stackoverflow.com/questions/1058149/using-a-byte-array-as-hashmap-key-java]) > * It's using IdentityGroupingStrategy to get group and use it as key of the > cache, which means the cache will include an entry for each region. This is > especially unnecessary when using BoundedRegionGroupingProvider > Besides fixing the above issues, I suggest to change > BoundedRegionGroupingProvider from a *provider* to a pluggable *strategy*, > which will make the whole picture much more clear. > For more details, please refer to the patch -- This message was sent by Atlassian JIRA (v6.3.4#6332)