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Posted to dev@hbase.apache.org by "Toshihiro Suzuki (JIRA)" <ji...@apache.org> on 2015/08/20 09:24:45 UTC
[jira] [Created] (HBASE-14266) RegionServers have a lock contention
of Configuration.getProps
Toshihiro Suzuki created HBASE-14266:
----------------------------------------
Summary: 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
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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