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https://issues.apache.org/jira/browse/YARN-7341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16208087#comment-16208087
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Robert Kanter commented on YARN-7341:
-------------------------------------
[~jlowe], neither the {{mergeMetrics}} method nor the test exist in branch-2,
so I figured that YARN-7095 had a different patch for branch-2. But looking at
the git history now, it looks like it's not actually in branch-2 at all:
{noformat}
>> [155] 11:09 : hadoop-common (trunk) :: git log branch-2 --oneline | grep
>> YARN-7095
>> [156] 11:21 : hadoop-common (trunk) :: git log trunk --oneline | grep
>> YARN-7095
bac4e8cca8b YARN-7095. Federation: routing getNode/getNodes/getMetrics REST
invocations transparently to multiple RMs. (Giovanni Matteo Fumarola via Subru).
>> [157] 11:21 : hadoop-common (trunk) :: git log branch-3.0 --oneline | grep
>> YARN-7095
bac4e8cca8b YARN-7095. Federation: routing getNode/getNodes/getMetrics REST
invocations transparently to multiple RMs. (Giovanni Matteo Fumarola via Subru).
{noformat}
Either YARN-7095 has the wrong fix version or someone forgot to backport it.
[~subru]?
> TestRouterWebServiceUtil#testMergeMetrics is flakey
> ---------------------------------------------------
>
> Key: YARN-7341
> URL: https://issues.apache.org/jira/browse/YARN-7341
> Project: Hadoop YARN
> Issue Type: Bug
> Components: federation
> Affects Versions: 3.0.0-beta1
> Reporter: Robert Kanter
> Assignee: Robert Kanter
> Fix For: 3.0.0
>
> Attachments: YARN-7341.001.patch
>
>
> {{TestRouterWebServiceUtil#testMergeMetrics}} is flakey. It sometimes fails
> with something like:
> {noformat}
> Running org.apache.hadoop.yarn.server.router.webapp.TestRouterWebServiceUtil
> Tests run: 8, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 0.252 sec <<<
> FAILURE! - in
> org.apache.hadoop.yarn.server.router.webapp.TestRouterWebServiceUtil
> testMergeMetrics(org.apache.hadoop.yarn.server.router.webapp.TestRouterWebServiceUtil)
> Time elapsed: 0.005 sec <<< FAILURE!
> java.lang.AssertionError: expected:<1092> but was:<584>
> at org.junit.Assert.fail(Assert.java:88)
> at org.junit.Assert.failNotEquals(Assert.java:743)
> at org.junit.Assert.assertEquals(Assert.java:118)
> at org.junit.Assert.assertEquals(Assert.java:555)
> at org.junit.Assert.assertEquals(Assert.java:542)
> at
> org.apache.hadoop.yarn.server.router.webapp.TestRouterWebServiceUtil.testMergeMetrics(TestRouterWebServiceUtil.java:473)
> {noformat}
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