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From "Wei-Chiu Chuang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9594) DataNode threw NullPointerException
Date Wed, 23 Dec 2015 17:24:46 GMT
Wei-Chiu Chuang created HDFS-9594:
-------------------------------------

             Summary: DataNode threw NullPointerException
                 Key: HDFS-9594
                 URL: https://issues.apache.org/jira/browse/HDFS-9594
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
    Affects Versions: 3.0.0
         Environment: Jenkins
            Reporter: Wei-Chiu Chuang
            Assignee: Wei-Chiu Chuang


In a precommit jenkins, I saw multiple exceptions. 
https://builds.apache.org/job/PreCommit-HDFS-Build/13984/testReport/org.apache.hadoop.hdfs/TestDFSShell/testSymLinkReserved/

One of which is a null pointer exception in datanode.
{noformat}
2015-12-23 13:26:50,337 [DataNode: [[[DISK]file:/testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/1/dfs/data/data1/,
[DISK]file:/testptch/hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/1/dfs/data/data2/]]
 heartbeating to localhost/127.0.0.1:38151] WARN  datanode.DataNode (BPServiceActor.java:run(859))
- Unexpected exception in block pool Block pool BP-1060337608-172.17.0.3-1450877209942 (Datanode
Uuid 6b120576-5c02-402f-ab38-079295bda597) service to localhost/127.0.0.1:38151
java.lang.NullPointerException
	at org.apache.hadoop.hdfs.server.datanode.DataNode.bpRegistrationSucceeded(DataNode.java:1391)
	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.registrationSucceeded(BPOfferService.java:360)
	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.register(BPServiceActor.java:796)
	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:231)
	at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:829)
	at java.lang.Thread.run(Thread.java:745)
{noformat}



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