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https://issues.apache.org/jira/browse/HBASE-18086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16091726#comment-16091726
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Ted Yu commented on HBASE-18086:
--------------------------------
Running load-client against 1.1 cluster, the client hung at the end of write
phase:
{code}
I0718 15:20:27.652695 9636 load-client.cc:260] joining thread 7
I0718 15:20:27.652781 9636 load-client.cc:262] joined thread 7
I0718 15:20:27.652876 9636 load-client.cc:260] joining thread 8
2017-07-18 15:20:30,545:9636(0x7f9ee50ad700):ZOO_WARN@zookeeper_interest@1570:
Exceeded deadline by 13ms
2017-07-18 15:20:43,893:9636(0x7f9ee50ad700):ZOO_WARN@zookeeper_interest@1570:
Exceeded deadline by 13ms
{code}
Attempt to attach gdb to the hanging process encountered:
{code}
Attaching to process 9636
Could not attach to process. If your uid matches the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf
ptrace: Operation not permitted.
{code}
Even after modifying /etc/sysctl.d/10-ptrace.conf , I still got the same error.
> Create native client which creates load on selected cluster
> -----------------------------------------------------------
>
> Key: HBASE-18086
> URL: https://issues.apache.org/jira/browse/HBASE-18086
> Project: HBase
> Issue Type: Sub-task
> Reporter: Ted Yu
> Assignee: Ted Yu
> Attachments: 18086.v11.txt, 18086.v12.txt, 18086.v14.txt,
> 18086.v1.txt, 18086.v3.txt, 18086.v4.txt, 18086.v5.txt, 18086.v6.txt,
> 18086.v7.txt, 18086.v8.txt
>
>
> This task is to create a client which uses multiple threads to conduct Puts
> followed by Gets against selected cluster.
> Default is to run the tool against local cluster.
> This would give us some idea on the characteristics of native client in terms
> of handling high load.
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