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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5706) "Dropping fs latency stats since buffer is full" spam
Date Thu, 05 Apr 2012 00:55:22 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246907#comment-13246907
] 

Hudson commented on HBASE-5706:
-------------------------------

Integrated in HBase-0.94-security #7 (See [https://builds.apache.org/job/HBase-0.94-security/7/])
    HBASE-5706 'Dropping fs latency stats since buffer is full' spam (Revision 1309459)

     Result = SUCCESS
stack : 
Files : 
* /hbase/branches/0.94/src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java

                
> "Dropping fs latency stats since buffer is full" spam
> -----------------------------------------------------
>
>                 Key: HBASE-5706
>                 URL: https://issues.apache.org/jira/browse/HBASE-5706
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Jean-Daniel Cryans
>            Assignee: Shaneal Manek
>            Priority: Minor
>             Fix For: 0.94.0, 0.96.0
>
>         Attachments: HBASE-5706.patch
>
>
> I see tons of this while running tests (note that it's a WARN):
> {noformat}
> 2012-04-03 18:54:47,172 WARN org.apache.hadoop.hbase.io.hfile.HFile: Dropping fs latency
stats since buffer is full
> {noformat}
> While the code says this:
> {noformat}
>   // we don't want to fill up the logs with this message, so only log it 
>   // once every 30 seconds at most
>   // I also want to avoid locks on the 'critical path' (the common case will be
>   // uncontended) - hence the CAS
>   private static void logDroppedLatencyStat() {
> {noformat}
> It doesn't seem like this message is actionnable and even though it's printed "only"
every 30 seconds it's still very spammy.
> We should get rid of it or make it more useful (I don't know which).

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