xuzq created HDFS-13677: --------------------------- Summary: Dynamic refresh Disk configuration results in overwriting VolumeMap Key: HDFS-13677 URL: https://issues.apache.org/jira/browse/HDFS-13677 Project: Hadoop HDFS Issue Type: Bug Affects Versions: 3.0.0, 2.6.0 Reporter: xuzq Attachments: 0001-fix-the-bug-of-the-refresh-disk-configuration.patch, image-2018-06-14-13-05-54-354.png, image-2018-06-14-13-10-24-032.png
When I added a new disk by dynamically refreshing the configuration, an exception "FileNotFound while finding block" was caused. The steps are as follows: 1.Change the hdfs-site.xml of DataNode to add a new disk. 2.Refresh the configuration by "./bin/hdfs dfsadmin -reconfig datanode ****:50020 start" The error is like: ``` VolumeScannerThread(/media/disk5/hdfs/dn): FileNotFound while finding block BP-233501496-*.*.*.*-1514185698256:blk_1620868560_547245090 on volume /media/disk5/hdfs/dn org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Replica not found for BP-1997955181-*.*.*.*-1514186468560:blk_1090885868_17145082 at org.apache.hadoop.hdfs.server.datanode.BlockSender.getReplica(BlockSender.java:471) at org.apache.hadoop.hdfs.server.datanode.BlockSender.<init>(BlockSender.java:240) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:553) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:148) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:103) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:254) at java.lang.Thread.run(Thread.java:748) ``` I added some logs for confirmation, as follows: Log Code like: !image-2018-06-14-13-05-54-354.png! And the result is like: !image-2018-06-14-13-10-24-032.png! The Size of 'VolumeMap' has been reduced, and We found the 'VolumeMap' to be overridden by the new Disk Block by the method 'ReplicaMap.addAll(ReplicaMap other)'. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org