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https://issues.apache.org/jira/browse/HELIX-563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhen Zhang closed HELIX-563.
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Resolution: Fixed
https://git-wip-us.apache.org/repos/asf?p=helix.git;a=commit;h=03d25dd5bdbd30df5d5c7b9807ccacc1462266fd
> Throw more meaningful exceptions when
> AutoRebalanceStrategy#computePartitionAssignment inputs are invalid
> ---------------------------------------------------------------------------------------------------------
>
> Key: HELIX-563
> URL: https://issues.apache.org/jira/browse/HELIX-563
> Project: Apache Helix
> Issue Type: Bug
> Reporter: Zhen Zhang
> Assignee: Zhen Zhang
>
> We hit the following NPE when the input for
> AutoRebalanceStrategy#computePartitionAssignment is invalid:
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.helix.controller.strategy.AutoRebalanceStrategy$Node.access$300(AutoRebalanceStrategy.java:571)
> at
> org.apache.helix.controller.strategy.AutoRebalanceStrategy.computeExistingNonPreferredPlacement(AutoRebalanceStrategy.java:437)
> at
> org.apache.helix.controller.strategy.AutoRebalanceStrategy.computePartitionAssignment(AutoRebalanceStrategy.java:122)
> ...
> {noformat}
> The particular problem is curMapping.keySet() is not a subset of
> allPartitions in the following code snippet:
> {noformat}
> AutoRebalanceStrategy strategy = new AutoRebalanceStrategy(..,
> allPartitions,...)
> strategy.computePartitionAssignment(..., curMapping, ...)
> {noformat}
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