You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "Ian Friedman (JIRA)" <ji...@apache.org> on 2013/03/13 23:40:13 UTC
[jira] [Commented] (HBASE-8096) [replication] NPE while replicating
a log that is acquiring a new block from HDFS
[ https://issues.apache.org/jira/browse/HBASE-8096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601754#comment-13601754 ]
Ian Friedman commented on HBASE-8096:
-------------------------------------
One workaround we've come up with is to set the hbase.regionserver.hlog.blocksize high, like 128M, and then the hbase.regionserver.logroll.multiplier to 50%
> [replication] NPE while replicating a log that is acquiring a new block from HDFS
> ----------------------------------------------------------------------------------
>
> Key: HBASE-8096
> URL: https://issues.apache.org/jira/browse/HBASE-8096
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.94.5
> Reporter: Ian Friedman
>
> We're getting an NPE during replication, which causes replication for that RegionServer to stop until we restart it.
> {noformat}
> 2013-03-10 12:49:12,679 ERROR org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Unexpected exception in ReplicationSource, currentPath=hdfs://hmaster1:9000/hbase/.logs/hslave1177,60020,1362549511446/hslave1177%2C60020%2C1362549511446.1362944946489
> java.lang.NullPointerException
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.updateBlockInfo(DFSClient.java:1882)
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.openInfo(DFSClient.java:1855)
> at org.apache.hadoop.hdfs.DFSClient$DFSInputStream.<init>(DFSClient.java:1831)
> at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:578)
> at org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:154)
> at org.apache.hadoop.fs.FilterFileSystem.open(FilterFileSystem.java:108)
> at org.apache.hadoop.io.SequenceFile$Reader.openFile(SequenceFile.java:1495)
> at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader.openFile(SequenceFileLogReader.java:62)
> at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1482)
> at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1475)
> at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1470)
> at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader.<init>(SequenceFileLogReader.java:55)
> at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.reset(SequenceFileLogReader.java:308)
> at org.apache.hadoop.hbase.replication.regionserver.ReplicationHLogReaderManager.openReader(ReplicationHLogReaderManager.java:69)
> at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.openReader(ReplicationSource.java:505)
> at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:313)
> {noformat}
> Some extra digging into the DataNode and NameNode logs makes this seem related to:
> https://issues.apache.org/jira/browse/HBASE-7530
> and
> https://issues.apache.org/jira/browse/HDFS-4380
> Here's the relevant snipped portions of the RS, DN, and NN logs:
> {noformat}
> RS 2013-03-10 12:49:12,618 INFO org.apache.hadoop.hbase.replication.regionserver.ReplicationSourceManager: Going to report log #hslave1177%2C60020%2C1362549511446.1362944946489 for position 59670826 in hdfs://hmaster1:9000/hbase/.logs/hslave1177,60020,1362549511446/hslave1177%2C60020%2C1362549511446.1362944946489
> RS 2013-03-10 12:49:12,621 DEBUG org.apache.hadoop.hbase.regionserver.LogRoller: HLog roll requested
> RS 2013-03-10 12:49:12,623 DEBUG org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Replicated in total: 31500300
> RS 2013-03-10 12:49:12,623 DEBUG org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Opening log for replication hslave1177%2C60020%2C1362549511446.1362944946489 at 59670826
> NN 2013-03-10 12:49:12,627 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* NameSystem.allocateBlock: /hbase/.logs/hslave1177,60020,1362549511446/hslave1177%2C60020%2C1362549511446.1362944946489. blk_6905758215335505153_656717631
> RS 2013-03-10 12:49:12,679 ERROR org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Unexpected exception in ReplicationSource, currentPath=hdfs://hmaster1:9000/hbase/.logs/hslave1177,60020,1362549511446/hslave1177%2C60020%2C1362549511446.1362944946489
> DN 2013-03-10 12:49:12,680 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Receiving block blk_6905758215335505153_656717631 src: /192.168.44.1:43503 dest: /192.168.44.1:50010
> NN 2013-03-10 12:49:12,804 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* NameSystem.fsync: file /hbase/.logs/hslave1177,60020,1362549511446/hslave1177%2C60020%2C1362549511446.1362944946489 for DFSClient_hb_rs_hslave1177,60020,1362549511446
> {noformat}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira