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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5706) "Dropping fs latency stats since buffer is full" spam
Date Wed, 04 Apr 2012 04:09:21 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13246004#comment-13246004
] 

Hadoop QA commented on HBASE-5706:
----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12521260/HBASE-5706.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    -1 tests included.  The patch doesn't appear to include any new or modified tests.
                        Please justify why no new tests are needed for this patch.
                        Also please list what manual steps were performed to verify this patch.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 2 new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

     -1 core tests.  The patch failed these unit tests:
                       org.apache.hadoop.hbase.mapreduce.TestMultithreadedTableMapper
                  org.apache.hadoop.hbase.mapreduce.TestImportTsv
                  org.apache.hadoop.hbase.mapred.TestTableMapReduce
                  org.apache.hadoop.hbase.mapreduce.TestHFileOutputFormat
                  org.apache.hadoop.hbase.mapreduce.TestTableMapReduce

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/1383//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/1383//artifact/trunk/patchprocess/newPatchFindbugsWarnings.html
Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/1383//console

This message is automatically generated.
                
> "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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