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https://issues.apache.org/jira/browse/HBASE-14266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14972383#comment-14972383
]
Hadoop QA commented on HBASE-14266:
-----------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12768465/14266v3.txt
against master branch at commit 8b7796b0b661ca960463c9e16034ee8f64494dbd.
ATTACHMENT ID: 12768465
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:green}+1 tests included{color}. The patch appears to include 36 new
or modified tests.
{color:green}+1 hadoop versions{color}. The patch compiles with all
supported hadoop versions (2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.0 2.6.1 2.7.0
2.7.1)
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 protoc{color}. The applied patch does not increase the
total number of protoc compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:red}-1 checkstyle{color}. The applied patch generated
1733 checkstyle errors (more than the master's current 1732 errors).
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 2.0.3) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 lineLengths{color}. The patch does not introduce lines
longer than 100
{color:green}+1 site{color}. The mvn post-site goal succeeds with this patch.
{color:red}-1 core tests{color}. The patch failed these unit tests:
org.apache.hadoop.hbase.regionserver.TestMobStoreCompaction
org.apache.hadoop.hbase.mob.compactions.TestMobCompactor
org.apache.hadoop.hbase.regionserver.TestDefaultMemStore
org.apache.hadoop.hbase.mob.compactions.TestPartitionedMobCompactor
org.apache.hadoop.hbase.regionserver.TestReversibleScanners
org.apache.hadoop.hbase.regionserver.TestStoreScanner
org.apache.hadoop.hbase.snapshot.TestMobSecureExportSnapshot
Test results:
https://builds.apache.org/job/PreCommit-HBASE-Build/16206//testReport/
Release Findbugs (version 2.0.3) warnings:
https://builds.apache.org/job/PreCommit-HBASE-Build/16206//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors:
https://builds.apache.org/job/PreCommit-HBASE-Build/16206//artifact/patchprocess/checkstyle-aggregate.html
Console output:
https://builds.apache.org/job/PreCommit-HBASE-Build/16206//console
This message is automatically generated.
> RegionServers have a lock contention of Configuration.getProps
> --------------------------------------------------------------
>
> Key: HBASE-14266
> URL: https://issues.apache.org/jira/browse/HBASE-14266
> Project: HBase
> Issue Type: Improvement
> Components: regionserver
> Environment: hbase-0.98.6-cdh5.3.1
> Reporter: Toshihiro Suzuki
> Assignee: Andrew Purtell
> Priority: Critical
> Attachments: 14266v2.patch, 14266v3.txt, HBASE-14266.patch, Screen
> Shot 2015-10-23 at 5.11.46 PM.png, Screen Shot 2015-10-23 at 5.24.03 PM.png,
> thread_dump.txt
>
>
> Here's an extract from thread dump of the RegionServer of my cluster:
> {code}
> ...
> Thread 267 (RW.default.readRpcServer.handler=184,queue=15,port=60020):
> State: BLOCKED
> Blocked count: 204028
> Waited count: 9702639
> Blocked on org.apache.hadoop.conf.Configuration@5a5e3da
> Blocked by 250 (RW.default.readRpcServer.handler=167,queue=18,port=60020)
> Stack:
> org.apache.hadoop.conf.Configuration.getProps(Configuration.java:2250)
> org.apache.hadoop.conf.Configuration.get(Configuration.java:861)
> org.apache.hadoop.conf.Configuration.getTrimmed(Configuration.java:880)
> org.apache.hadoop.conf.Configuration.getBoolean(Configuration.java:1281)
>
> org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:138)
>
> org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:157)
>
> org.apache.hadoop.hbase.regionserver.HStore.createScanner(HStore.java:1804)
> org.apache.hadoop.hbase.regionserver.HStore.getScanner(HStore.java:1794)
>
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:3852)
>
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1952)
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1938)
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1915)
> org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:4872)
> org.apache.hadoop.hbase.regionserver.HRegion.get(HRegion.java:4847)
>
> org.apache.hadoop.hbase.regionserver.HRegionServer.get(HRegionServer.java:2918)
>
> org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:29921)
> org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2031)
> org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:108)
> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:116)
> org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:96)
> ...
> {code}
> There are such many threads in the thread dump.
> I think that RegionServers have a lock contention which causes performance
> issue.
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