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https://issues.apache.org/jira/browse/HDFS-13410?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yiqun Lin updated HDFS-13410:
-----------------------------
Affects Version/s: 3.0.0
Target Version/s: 3.2.0, 3.1.1
> RBF: Support federation with no subclusters
> -------------------------------------------
>
> Key: HDFS-13410
> URL: https://issues.apache.org/jira/browse/HDFS-13410
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 3.0.0
> Reporter: Íñigo Goiri
> Assignee: Íñigo Goiri
> Priority: Minor
> Fix For: 2.10.0, 3.2.0, 3.1.1, 2.9.2, 3.0.4
>
> Attachments: HDFS-13410.000.patch, HDFS-13410.001.patch,
> HDFS-13410.002.patch
>
>
> If the federation has no subclusters the logs have long stack traces. Even
> though this is not a regular setup for RBF, we should trigger log message.
> An example:
> {code}
> Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
> at java.util.LinkedList.checkElementIndex(LinkedList.java:555)
> at java.util.LinkedList.get(LinkedList.java:476)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcClient.invokeConcurrent(RouterRpcClient.java:1028)
> at
> org.apache.hadoop.hdfs.server.federation.router.RouterRpcServer.getDatanodeReport(RouterRpcServer.java:1264)
> at
> org.apache.hadoop.hdfs.server.federation.metrics.FederationMetrics.getNodeUsage(FederationMetrics.java:424)
> {code}
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