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https://issues.apache.org/jira/browse/HDFS-16097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Xiaoqiao He reassigned HDFS-16097:
----------------------------------
Assignee: lei w
> Datanode receives ipc requests will throw NPE when datanode quickly restart
> ----------------------------------------------------------------------------
>
> Key: HDFS-16097
> URL: https://issues.apache.org/jira/browse/HDFS-16097
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Environment:
> Reporter: lei w
> Assignee: lei w
> Priority: Major
> Attachments: HDFS-16097.001.patch
>
>
> Datanode receives ipc requests will throw NPE when datanode quickly restart.
> This is because when DN is reStarted, BlockPool is first registered with
> blockPoolManager and then fsdataset is initialized. When BlockPool is
> registered to blockPoolManager without initializing fsdataset, DataNode
> receives an IPC request will throw NPE, because it will call related methods
> provided by fsdataset. The stack exception is as follows：
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.initReplicaRecovery(DataNode.java:3468)
> at
> org.apache.hadoop.hdfs.protocolPB.InterDatanodeProtocolServerSideTranslatorPB.initReplicaRecovery(InterDatanodeProtocolServerSideTranslatorPB.java:55)
> at
> org.apache.hadoop.hdfs.protocol.proto.InterDatanodeProtocolProtos$InterDatanodeProtocolService$2.callBlockingMethod(InterDatanodeProtocolProtos.java:3105)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:523)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:991)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:916)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:862)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> {code}
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