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From "Zhang Jingpeng (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11240) Print hdfs pipeline when hlog's sync is slow
Date Fri, 23 May 2014 08:08:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14006960#comment-14006960

Zhang Jingpeng commented on HBASE-11240:

log,debug("begin call writer to write HLlog");
 this.syncFs.invoke(this.writer, HLog.NO_ARGS);
log,debug("end call writer to write HLlog");

> Print hdfs pipeline when hlog's sync is slow
> --------------------------------------------
>                 Key: HBASE-11240
>                 URL: https://issues.apache.org/jira/browse/HBASE-11240
>             Project: HBase
>          Issue Type: Improvement
>          Components: wal
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
> Sometimes the slow sync of hlog writer is because there is an abnormal datanode in the
pipeline. So it will be helpful to print the pipeline of slow sync to diagnose those problems.
> The ultimate solution is to join the trace of HBase and HDFS.

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