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From "Vaibhav Gumashta (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HIVE-8440) Hiveserver block query
Date Tue, 09 Dec 2014 10:57:15 GMT

     [ https://issues.apache.org/jira/browse/HIVE-8440?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vaibhav Gumashta resolved HIVE-8440.
------------------------------------
    Resolution: Duplicate

This is a dup of the linked jira.

> Hiveserver block query
> ----------------------
>
>                 Key: HIVE-8440
>                 URL: https://issues.apache.org/jira/browse/HIVE-8440
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.12.0
>         Environment: OS:Red Hat Enterprise Linux Server release 6.5 (Santiago)
> CPU:64 cores
> Memory:64GB
> Hadoop:CDH4.2.1
>            Reporter: zengyongping
>            Priority: Critical
>              Labels: Hive0.12
>   Original Estimate: 72h
>  Remaining Estimate: 72h
>
> In our  environment Hiveserver handle approximately 15000 jobs per day。Sometimes we
found a large number of  ETL tasks wait in our ETL schedule  queue to run。In this situation
only few Hadoop Job running in Hadoop cluster,many maps and reduces slots free.We view Hiveserver
heap found Hiveserver block a large number of query:
> "pool-1-thread-17903" prio=10 tid=0x00007f89589c8000 nid=0x13865 waiting for monitor
entry [0x00007f893413b000]
>    java.lang.Thread.State: BLOCKED (on object monitor)
> 	at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:977)
> 	- waiting to lock <0x00000006000ac458> (a java.lang.Object)
> 	at org.apache.hadoop.hive.ql.Driver.run(Driver.java:888)
> 	at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.execute(HiveServer.java:198)
> 	at org.apache.hadoop.hive.service.ThriftHive$Processor$execute.getResult(ThriftHive.java:644)
> 	at org.apache.hadoop.hive.service.ThriftHive$Processor$execute.getResult(ThriftHive.java:628)
> 	at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
> 	at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
> 	at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:206)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
>      It is a problem of HiveServer cannot handle concurrent requests from more than one
client.?Why HiveServer cannot handle concurrent requests?
> https://github.com/apache/hive/blob/branch-0.12/ql/src/java/org/apache/hadoop/hive/ql/Driver.java#L975
> Under code in org.apache.hadoop.hive.ql cause Hiveserver cannot handle concurrent requests?
>  int ret;
>     synchronized (compileMonitor) {
>       ret = compile(command);
>     }



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