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https://issues.apache.org/jira/browse/HDFS-6110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13966361#comment-13966361
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Colin Patrick McCabe commented on HDFS-6110:
--------------------------------------------
{code}
+ public static final int DFS_SLOW_IO_WARNING_THRESHOLD_DEFAULT = 300;
{code}
It's odd that this is an int, given that we retrieve the threshold as a long
later on. This seems likely to lead to confusion-- can we just make this a
long everywhere?
+1 after that's addressed
> adding more slow action log in critical write path
> --------------------------------------------------
>
> Key: HDFS-6110
> URL: https://issues.apache.org/jira/browse/HDFS-6110
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 3.0.0, 2.3.0
> Reporter: Liang Xie
> Assignee: Liang Xie
> Attachments: HDFS-6110-v2.txt, HDFS-6110.txt, HDFS-6110v3.txt,
> HDFS-6110v4.txt
>
>
> After digging a HBase write spike issue caused by slow buffer io in our
> cluster, just realize we'd better to add more abnormal latency warning log in
> write flow, such that if other guys hit HLog sync spike, we could know more
> detail info from HDFS side at the same time.
> Patch will be uploaded soon.
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