Please do Andrew. Thanks.
> On Oct 23, 2015, at 1:49 PM, Andrew Purtell (JIRA) <[email protected]> wrote:
>
>
> [
> https://issues.apache.org/jira/browse/HBASE-14266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14971601#comment-14971601
> ]
>
> Andrew Purtell commented on HBASE-14266:
> ----------------------------------------
>
> Are you still working on this [~graziergeek]? If not I can take it.
>
>> 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: Jeff Cunningham
>> Priority: Critical
>> Attachments: HBASE-14266.patch, 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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