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Hadoop QA commented on HBASE-7295: ---------------------------------- {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12559803/7295-trunk.txt against trunk revision . {color:green}+1 @author{color}. The patch does not contain any @author tags. {color:red}-1 tests included{color}. The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch. {color:green}+1 hadoop2.0{color}. The patch compiles against the hadoop 2.0 profile. {color:red}-1 javadoc{color}. The javadoc tool appears to have generated 101 warning messages. {color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings. {color:red}-1 findbugs{color}. The patch appears to introduce 23 new Findbugs (version 1.3.9) warnings. {color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings. {color:red}-1 core tests{color}. The patch failed these unit tests: org.apache.hadoop.hbase.util.TestMiniClusterLoadParallel org.apache.hadoop.hbase.util.TestHBaseFsck Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//testReport/ Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop2-compat.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-examples.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-protocol.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop1-compat.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-common.html Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-hadoop-compat.html Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/3454//console This message is automatically generated. > Contention in HBaseClient.getConnection > --------------------------------------- > > Key: HBASE-7295 > URL: https://issues.apache.org/jira/browse/HBASE-7295 > Project: HBase > Issue Type: Improvement > Affects Versions: 0.94.3 > Reporter: Varun Sharma > Assignee: Varun Sharma > Fix For: 0.94.3 > > Attachments: 7295-0.94.txt, 7295-0.94-v2.txt, 7295-trunk.txt > > > HBaseClient.getConnection() synchronizes on the connections object. We found > severe contention on a thrift gateway which was fanning out roughly 3000+ > calls per second to hbase region servers. The thrift gateway had 2000+ > threads for handling incoming connections. Threads were blocked on the > syncrhonized block - we set ipc.pool.size to 200. Since we are using > RoundRobin/ThreadLocal pool only - its not necessary to synchronize on > connections - it might lead to cases where we might go slightly over the > ipc.max.pool.size() but the additional connections would timeout after > maxIdleTime - underlying PoolMap connections object is thread safe. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira