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https://issues.apache.org/jira/browse/HDFS-5356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14356687#comment-14356687
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Vinayakumar B commented on HDFS-5356:
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bq. It is failing when comparing
SnapshotTestHelper.compareDumpedTreeInFile(fsnBefore, fsnMiddle,
compareQuota);. fsnBefore and fsnMiddle differs in their storagespace values.
This seems unrelated to closure of filesystem.
OK now I got. If you are closing the filesystem, then open files are being
closed which results in diff in these image sizes.
I didnt check that image file sizes were being checked in the test. I just told
about the functionality.
> MiniDFSCluster shoud close all open FileSystems when shutdown()
> ---------------------------------------------------------------
>
> Key: HDFS-5356
> URL: https://issues.apache.org/jira/browse/HDFS-5356
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 3.0.0, 2.2.0
> Reporter: haosdent
> Assignee: Rakesh R
> Priority: Critical
> Attachments: HDFS-5356-1.patch, HDFS-5356-2.patch, HDFS-5356-3.patch,
> HDFS-5356-4.patch, HDFS-5356.patch
>
>
> After add some metrics functions to DFSClient, I found that some unit tests
> relates to metrics are failed. Because MiniDFSCluster are never close open
> FileSystems, DFSClients are alive after MiniDFSCluster shutdown(). The
> metrics of DFSClients in DefaultMetricsSystem are still exist and this make
> other unit tests failed.
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