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https://issues.apache.org/jira/browse/HDFS-15900?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17332000#comment-17332000
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Bhavik Patel commented on HDFS-15900:
-------------------------------------
[~hdaikoku] thank you for the commit link but, there is a UT failure in
"TestRouterRPCClientRetries" class
{code:java}
[INFO] Running
org.apache.hadoop.hdfs.server.federation.router.TestRouterRPCClientRetries
[ERROR] Tests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 47.144
s <<< FAILURE! - in
org.apache.hadoop.hdfs.server.federation.router.TestRouterRPCClientRetries
[ERROR]
testRetryWhenOneNameServiceDown(org.apache.hadoop.hdfs.server.federation.router.TestRouterRPCClientRetries)
Time elapsed: 13.178 s <<< FAILURE!
java.lang.AssertionError: expected:<0> but was:<1>
at org.junit.Assert.fail(Assert.java:89)
at org.junit.Assert.failNotEquals(Assert.java:835)
at org.junit.Assert.assertEquals(Assert.java:647)
at org.junit.Assert.assertEquals(Assert.java:633)
at
org.apache.hadoop.hdfs.server.federation.router.TestRouterRPCClientRetries.testRetryWhenOneNameServiceDown(TestRouterRPCClientRetries.java:162)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
{code}
can you please check and update...
> RBF: empty blockpool id on dfsrouter caused by UNAVAILABLE NameNode
> -------------------------------------------------------------------
>
> Key: HDFS-15900
> URL: https://issues.apache.org/jira/browse/HDFS-15900
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: rbf
> Affects Versions: 3.3.0
> Reporter: Harunobu Daikoku
> Assignee: Harunobu Daikoku
> Priority: Major
> Labels: pull-request-available
> Fix For: 3.3.1, 3.4.0, 3.1.5, 3.2.3
>
> Attachments: image.png
>
> Time Spent: 5h 50m
> Remaining Estimate: 0h
>
> We observed that when a NameNode becomes UNAVAILABLE, the corresponding
> blockpool id in MembershipStoreImpl#activeNamespaces on dfsrouter
> unintentionally sets to empty, its initial value.
> !image.png|height=250!
> As a result of this, concat operations through dfsrouter fail with the
> following error as it cannot resolve the block id in the recognized active
> namespaces.
> {noformat}
> Caused by:
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.ipc.RemoteException):
> Cannot locate a nameservice for block pool BP-...
> {noformat}
> A possible fix is to ignore UNAVAILABLE NameNode registrations, and set
> proper namespace information obtained from available NameNode registrations
> when constructing the cache of active namespaces.
>
> [https://github.com/apache/hadoop/blob/rel/release-3.3.0/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/impl/MembershipStoreImpl.java#L207-L221]
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