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https://issues.apache.org/jira/browse/HDFS-15505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18044558#comment-18044558
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ASF GitHub Bot commented on HDFS-15505:
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github-actions[bot] closed pull request #2182: HDFS-15505. Fix
NullPointerException when call getAdditionalDatanode method with null
extendedBlock parameter
URL: https://github.com/apache/hadoop/pull/2182
> Fix NullPointerException when call getAdditionalDatanode method with null
> extendedBlock parameter
> -------------------------------------------------------------------------------------------------
>
> Key: HDFS-15505
> URL: https://issues.apache.org/jira/browse/HDFS-15505
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: dfsclient
> Affects Versions: 3.0.0, 3.1.0, 3.0.1, 3.0.2, 3.2.0, 3.1.1, 3.0.3, 3.1.2,
> 3.3.0, 3.2.1, 3.1.3
> Reporter: hang chen
> Priority: Major
> Labels: pull-request-available
>
> When client call getAdditionalDatanode method, it will initialize
> GetAdditionalDatanodeRequestProto and send RPC request to Router/namenode.
> However, if we call getAdditionalDatanode method with null extendedBlock
> parameter, it will set GetAdditionalDatanodeRequestProto's blk field with
> null, which will cause NullPointerException. The code show as follow.
> {code:java}
> // code placeholder
> GetAdditionalDatanodeRequestProto req = GetAdditionalDatanodeRequestProto
> .newBuilder()
> .setSrc(src)
> .setFileId(fileId)
> .setBlk(PBHelperClient.convert(blk))
> .addAllExistings(PBHelperClient.convert(existings))
> .addAllExistingStorageUuids(Arrays.asList(existingStorageIDs))
> .addAllExcludes(PBHelperClient.convert(excludes))
> .setNumAdditionalNodes(numAdditionalNodes)
> .setClientName(clientName)
> .build();{code}
>
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