[jira] [Commented] (HDFS-2906) NullPointerExeception in BlockReceiver on DataNode restart.
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https://issues.apache.org/jira/browse/HDFS-2906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13202162#comment-13202162
]
Uma Maheswara Rao G commented on HDFS-2906:
---
As per my understanding there should not be any major impacts to the users due
to this error. If so, could you please mark this as minor?
NullPointerExeception in BlockReceiver on DataNode restart.
---
Key: HDFS-2906
URL: https://issues.apache.org/jira/browse/HDFS-2906
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.23.0
Reporter: Brahma Reddy Battula
Assignee: Uma Maheswara Rao G
Scenario:
1) Start the cluster with one NN and two DN's.
2) Keep restart one DN for every 10mins.
3) Let's keep the clients to write the data continuosly.
Observed below trace.
{noformat}
2012-02-07 01:03:45,897 ERROR
org.apache.hadoop.hdfs.server.datanode.DataNode:
HOST-10-18-40-23:50010:DataXceiver error processing WRITE_BLOCK operation
src: /10.18.40.20:23862 dest: /10.18.40.23:50010
java.lang.NullPointerException
at
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.init(BlockReceiver.java:151)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:340)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:98)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:66)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:167)
at java.lang.Thread.run(Thread.java:619)
2012-02-07 01:03:46,083 INFO org.apache.hadoop.hdfs.server.common.Storage:
Locking is disabled
{noformat}
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[jira] [Commented] (HDFS-2906) NullPointerExeception in BlockReceiver on DataNode restart.
[
https://issues.apache.org/jira/browse/HDFS-2906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13202168#comment-13202168
]
Brahma Reddy Battula commented on HDFS-2906:
HI Uma,
Thanks for analysis.Seems to same happening.
It's always able reprodcue by executing mentioned scenario..
NullPointerExeception in BlockReceiver on DataNode restart.
---
Key: HDFS-2906
URL: https://issues.apache.org/jira/browse/HDFS-2906
Project: Hadoop HDFS
Issue Type: Bug
Components: data-node
Affects Versions: 0.23.0
Reporter: Brahma Reddy Battula
Assignee: Uma Maheswara Rao G
Scenario:
1) Start the cluster with one NN and two DN's.
2) Keep restart one DN for every 10mins.
3) Let's keep the clients to write the data continuosly.
Observed below trace.
{noformat}
2012-02-07 01:03:45,897 ERROR
org.apache.hadoop.hdfs.server.datanode.DataNode:
HOST-10-18-40-23:50010:DataXceiver error processing WRITE_BLOCK operation
src: /10.18.40.20:23862 dest: /10.18.40.23:50010
java.lang.NullPointerException
at
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.init(BlockReceiver.java:151)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:340)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:98)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:66)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:167)
at java.lang.Thread.run(Thread.java:619)
2012-02-07 01:03:46,083 INFO org.apache.hadoop.hdfs.server.common.Storage:
Locking is disabled
{noformat}
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