hang chen created HDFS-15505:
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Summary: Fix NullPointerException when call getAdditionalDatanode
with null extendedBlock
Key: HDFS-15505
URL: https://issues.apache.org/jira/browse/HDFS-15505
Project: Hadoop HDFS
Issue Type: Bug
Components: dfsclient
Affects Versions: 3.1.3, 3.2.1, 3.3.0, 3.1.2, 3.0.3, 3.1.1, 3.2.0, 3.0.2,
3.0.1, 3.1.0, 3.0.0
Reporter: hang chen
Fix For: 3.3.1, 3.4.0
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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