[ 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); > } -- This message was sent by Atlassian JIRA (v6.3.4#6332)