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From "Chengbing Liu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8113) NullPointerException in BlockInfoContiguous causes block report failure
Date Thu, 09 Apr 2015 11:30:12 GMT
Chengbing Liu created HDFS-8113:
-----------------------------------

             Summary: NullPointerException in BlockInfoContiguous causes block report failure
                 Key: HDFS-8113
                 URL: https://issues.apache.org/jira/browse/HDFS-8113
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: namenode
    Affects Versions: 2.6.0
            Reporter: Chengbing Liu
            Assignee: Chengbing Liu


The following copy constructor can throw NullPointerException if {{bc}} is null.
{code}
  protected BlockInfoContiguous(BlockInfoContiguous from) {
    this(from, from.bc.getBlockReplication());
    this.bc = from.bc;
  }
{code}

We have observed that some DataNodes keeps failing doing block reports with NameNode. The
stacktrace is as follows. Though we are not using the latest version, the problem still exists.
{quote}
2015-03-08 19:28:13,442 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: RemoteException
in offerService
org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException): java.lang.NullPointerException
at org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo.(BlockInfo.java:80)
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$BlockToMarkCorrupt.(BlockManager.java:1696)
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.checkReplicaCorrupt(BlockManager.java:2185)
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReportedBlock(BlockManager.java:2047)
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.reportDiff(BlockManager.java:1950)
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReport(BlockManager.java:1823)
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReport(BlockManager.java:1750)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.blockReport(NameNodeRpcServer.java:1069)
at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.blockReport(DatanodeProtocolServerSideTranslatorPB.java:152)
at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:26382)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:587)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1026)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1623)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007)
{quote}



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