[HDFS-5890] Avoid NPE in Datanode heartbeat

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HDFS-5535 (Rolling upgrades)
• Component/s: datanode
• Target Version/s: HDFS-5535 (Rolling upgrades)
• Hadoop Flags: Reviewed
• Assignee: Vinayakumar B
• Reporter: Vinayakumar B
• Created: 05/Feb/14 11:56
• Updated: 06/Feb/14 04:59
• Resolved: 06/Feb/14 04:59

Description

Avoid NPE in datanode heartbeat messages.

2014-02-05 17:24:11,347 WARN org.apache.hadoop.ipc.Server: IPC Server handler 5 on 9000, call org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.sendHeartbeat from 10.18.40.32:13299 Call#1721 Retry#0: error: java.lang.NullPointerException
java.lang.NullPointerException
	at org.apache.hadoop.hdfs.protocolPB.PBHelper.convertRollingUpgradeStatus(PBHelper.java:1460)
	at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.sendHeartbeat(DatanodeProtocolServerSideTranslatorPB.java:124)
	at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:27704)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:605)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:932)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2048)