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https://issues.apache.org/jira/browse/HBASE-13097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14341310#comment-14341310
]
zhangduo commented on HBASE-13097:
----------------------------------
https://builds.apache.org/job/HBase-trunk/6181/artifact/hbase-server/target/surefire-reports/org.apache.hadoop.hbase.client.TestClientScannerRPCTimeout-output.txt
{noformat}
2015-02-28 03:32:26,444 INFO [MASTER_TABLE_OPERATIONS-asf900:37322-0]
hbase.MetaTableAccessor(1306): Added 2
2015-02-28 03:32:26,445 WARN [MASTER_TABLE_OPERATIONS-asf900:37322-0]
balancer.BaseLoadBalancer(1039): Wanted to do round robin assignment but no
servers to assign to
2015-02-28 03:32:26,445 ERROR [MASTER_TABLE_OPERATIONS-asf900:37322-0]
handler.CreateTableHandler(168): Error trying to create the table
testScannerNextRPCTimesout
java.io.IOException: Unable to determine a plan to assign region(s)
at
org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1446)
at
org.apache.hadoop.hbase.util.ModifyRegionUtils.assignRegions(ModifyRegionUtils.java:241)
at
org.apache.hadoop.hbase.master.handler.CreateTableHandler.handleCreateTable(CreateTableHandler.java:247)
at
org.apache.hadoop.hbase.master.handler.CreateTableHandler.process(CreateTableHandler.java:156)
at
org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:103)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
{noformat}
Seems failed to create table?
> Use same EventLoopGroup for different AsyncRpcClients if possible
> -----------------------------------------------------------------
>
> Key: HBASE-13097
> URL: https://issues.apache.org/jira/browse/HBASE-13097
> Project: HBase
> Issue Type: Bug
> Components: IPC/RPC, test
> Affects Versions: 2.0.0, 1.1.0
> Reporter: zhangduo
> Assignee: zhangduo
> Fix For: 2.0.0, 1.1.0
>
> Attachments: HBASE-13097-addendum.patch, HBASE-13097.patch,
> HBASE-13097_1.patch, HBASE-13097_2.patch
>
>
> In some unit tests(such as TestAcidGuarantees) we create multiple Connection
> instance. If we use AsyncRpcClient, then there will be multiple netty
> Bootstrap and every Bootstrap has its own PooledByteBufAllocator.
> I haven't read the code clearly but it uses some threadlocal technics and
> jmap shows io.netty.buffer.PoolThreadCache$MemoryRegionCache$Entry is the
> biggest things on Heap.
> See
> https://builds.apache.org/job/HBase-TRUNK/6168/artifact/hbase-server/target/surefire-reports/org.apache.hadoop.hbase.TestAcidGuarantees-output.txt
> {noformat}
> 2015-02-24 23:50:29,704 WARN [JvmPauseMonitor]
> util.JvmPauseMonitor$Monitor(167): Detected pause in JVM or host machine (eg
> GC): pause of approximately 20133ms
> GC pool 'PS MarkSweep' had collection(s): count=15 time=55525ms
> {noformat}
> Update: We use a singleton PooledByteBufAllocator so the reason should be too
> many threads. So we will work on reduce the connections and rpclients in unit
> tests.
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