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https://issues.apache.org/jira/browse/HDFS-15099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17013146#comment-17013146
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Chen Liang commented on HDFS-15099:
-----------------------------------
Thanks for the great suggestions [~shv]! Post v002 patch. Only difference is
that I removed
{code:java}
+ dfs.open(testPath).close();
+ assertSentTo(2); {code}
Because if my test, seems if machine is slow enough, the access time 200ms may
already passed here, and this call went to active already, failing the
assertion. I removed this check completely, as I think this is just to verify
an open can go to observer, which is already being covered by other tests,
should be no necessity to have it here.
> [SBN Read] getBlockLocations() should throw ObserverRetryOnActiveException on
> an attempt to change aTime on ObserverNode
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-15099
> URL: https://issues.apache.org/jira/browse/HDFS-15099
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.10.0
> Reporter: Konstantin Shvachko
> Assignee: Chen Liang
> Priority: Major
> Attachments: HDFS-15099-branch-2.10.001.patch,
> HDFS-15099-branch-2.10.002.patch
>
>
> The precision of updating an INode's aTime while executing
> {{getBlockLocations()}} is 1 hour by default. Updates cannot be handled by
> ObserverNode, so the call should be redirected to Active NameNode. In order
> to redirect to active the ObserverNode should through
> {{ObserverRetryOnActiveException}}.
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