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From Arpit Agarwal <aagar...@hortonworks.com>
Subject Re: Intermittent test errors in Hadoop-hdfs project
Date Fri, 27 Dec 2013 18:34:15 GMT
Hi Abhijeet, these tests pass consistently on my OS X dev machine.

Have you made any changes in your source tree? If you post logs for the
failed tests perhaps someone can take a look.



On Thu, Dec 26, 2013 at 9:41 PM, Abhijeet Apsunde <
Abhijeet_Apsunde@persistent.co.in> wrote:

> Thanks Arpit,
> As Ted also pointed out failed test is related to HDFS-5636, my question
> was mainly for 'tests in error' which I think is not faced by everyone.
>
> I'm running HDFS test suite and hitting some intermittent test errors.
> Tests in error vary for each run. And these error test cases execute
> successfully when ran separately.
> I tried these on 2 machines following is their configuration.
>
> 1. CentOS 6.2 , 8 core Xeon(R) CPU  E5320  @ 1.86GHz, 32GB RAM.
> 2. Ubuntu 12.04 running on  Windows Azure VM with 8 cores and 14 GB RAM
>
> Is there a recommended configuration for build machine ? if such errors
> are common how does apache CI handles these ?
>
> Following are results from machine 2.
>
> Tests in error:
>   TestPersistBlocks.TestRestartDfsWithFlush:81->testRestartDfs:123 » IO
> Timed ou...
>   TestDFSStartupVersions.testVersions:264->Object.wait:502->Object.wait:-2
> »  te...
>
> Tests run: 2260, Failures: 2, Errors: 2, Skipped: 49
>
> Thanks,
> Abhijeet.
>
> -----Original Message-----
> From: Arpit Agarwal [mailto:aagarwal@hortonworks.com]
> Sent: Friday, December 27, 2013 1:09 AM
> To: hdfs-dev@hadoop.apache.org; Andrew Wang
> Subject: Re: Intermittent test errors in Hadoop-hdfs project
>
> It looks like HDFS-5636 missed updating editsStored.
>
>
> On Wed, Dec 25, 2013 at 8:31 AM, Ted Yu <yuzhihong@gmail.com> wrote:
>
> > TestOfflineEditsViewer is the one appearing in Jenkins builds.
> >
> > I ran the other tests locally on Mac and they passed.
> >
> > Cheers
> >
> >
> > On Wed, Dec 25, 2013 at 5:38 AM, Abhijeet Apsunde <
> > Abhijeet_Apsunde@persistent.co.in> wrote:
> >
> > > Hi all,
> > >
> > > I'm running Junit tests suite for Hadoop-hdfs project, however none
> > > of 3 run attempts could complete successfully.
> > > There were random test failing due to some error and one consistent
> > > failure.
> > >
> > > I believe one consistently broken test is due to following change,
> > > since corresponding "editsStored" binary file is not checked in with
> > > modified "editsStored.xml" file in this particular revision.
> > > ###############################
> > > Revision: 1552841
> > > Author: cmccabe
> > > Date: Saturday, December 21, 2013 4:57:20 AM
> > > Message:
> > > HDFS-5636. Enforce a max TTL per cache pool (awang via cmccabe)
> > > ----
> > > .
> > > .
> > > Modified :
> > >
> > /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/resource
> > s/editsStored.xml
> > > .
> > > ###############################
> > >
> > > 'Tests in error' passed successfully when ran separately. Test
> > > results snippet for all 3 runs is attached at the end of this mail.
> > > I would like to know if others also have noted similar observation
> > > or there's something wrong with my setup.
> > > If it's a common behaviour how does apache CI handles such scenarios
> > while
> > > testing a patch?
> > >
> > > Thanks,
> > > Abhijeet.
> > >
> > >
> > >
> > >
> > >
> > > ______________________Test results snippets ________________________
> > >
> > > Run1
> > > Failed tests:
> > >   TestOfflineEditsViewer.testStored:193 Reference XML edits and
> > > parsed to XML should be same
> > >
> > > Tests in error:
> > >   TestHDFSFileSystemContract.setUp:39 » IO Failed to save in any
> > > storage directo...
> > >   TestDatanodeReport.testDatanodeReport:48 » InconsistentFSState
> > > Directory /home...
> > > #######################
> > > Run2
> > > Failed tests:
> > >   TestOfflineEditsViewer.testStored:193 Reference XML edits and
> > > parsed to XML should be same
> > >
> > > Tests in error:
> > >   TestLeaseRecovery.testBlockSynchronization:80 » IO NameNode is
> > > not formatted.
> > >   TestDataNodeVolumeFailureToleration.setUp:71 » IO Timed out
> > > waiting
> > for
> > > Mini H...
> > >   TestDataNodeVolumeFailureToleration.tearDown:83 NullPointer
> > > ####################### Run 3 Failed tests:
> > >   TestOfflineEditsViewer.testStored:193 Reference XML edits and
> > > parsed to XML should be same
> > >
> > > Tests in error:
> > >   TestAppendDifferentChecksum.setupCluster:52 » IO Cannot lock
> > > storage /home/abh...
> > >   TestFileAppend3.testTC12 » Remote No lease on /TC12/foo: File is
> > > not open for ...
> > >   TestHDFSFileSystemContract.setUp:39 » InconsistentFSState
> > > Directory /home/abhi...
> > > ######################
> > >
> > >
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