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Lei (Eddy) Xu commented on HDFS-10822: -------------------------------------- +1. Thanks for adding more debug information, [~jzhuge] This patch does not include test because it only adds debug information. Committed to trunk and branch-2. > Log DataNodes in the write pipeline > ----------------------------------- > > Key: HDFS-10822 > URL: https://issues.apache.org/jira/browse/HDFS-10822 > Project: Hadoop HDFS > Issue Type: Improvement > Components: hdfs-client > Affects Versions: 2.6.0 > Reporter: John Zhuge > Assignee: John Zhuge > Priority: Trivial > Labels: supportability > Attachments: HDFS-10822.001.patch > > > Trying to diagnose a slow HDFS flush, taking longer than 10 seconds, but did > not know which DNs were involved in the write pipeline. Of course, I could > search NN log for the list of DNs, but it might not be possible sometimes or > convenient. > Propose to add a DEBUG trace to DataStreamer#setPipeline to print the list of > DNs in the pipeline. > BTW, we do print the list of DNs during pipeline recovery. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org