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Posted to common-user@hadoop.apache.org by Stas Oskin <st...@gmail.com> on 2009/04/11 01:30:04 UTC
Abandoning block messages

Hi.

I'm testing HDFS fault-tolerance, and randomly disconnecting and powering
off the chunk nodes to see how HDFS withstands it.

After I have disconnected a chunk node, the logs have started to fill with
the following errors:

09/04/11 02:25:12 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Bad connect ack with firstBadLink 192.168.253.41:50010
09/04/11 02:25:12 INFO dfs.DFSClient: Abandoning block
blk_-656235730036158252_1379
09/04/11 02:25:12 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Bad connect ack with firstBadLink 192.168.253.41:50010
09/04/11 02:25:12 INFO dfs.DFSClient: Abandoning block
blk_4525038275659790960_1379
09/04/11 02:25:12 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Bad connect ack with firstBadLink 192.168.253.41:50010
09/04/11 02:25:12 INFO dfs.DFSClient: Abandoning block
blk_4496668387968639765_1379
09/04/11 02:25:12 INFO dfs.DFSClient: Waiting to find target node:
192.168.253.20:50010
09/04/11 02:25:12 INFO dfs.DFSClient: Waiting to find target node:
192.168.253.20:50010
09/04/11 02:25:12 INFO dfs.DFSClient: Waiting to find target node:
192.168.253.20:50010
09/04/11 02:25:21 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Bad connect ack with firstBadLink 192.168.253.41:50010
09/04/11 02:25:21 INFO dfs.DFSClient: Abandoning block
blk_7909869387543801936_1379
09/04/11 02:25:21 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Bad connect ack with firstBadLink 192.168.253.41:50010
09/04/11 02:25:21 INFO dfs.DFSClient: Abandoning block
blk_3548805008548426073_1368
09/04/11 02:25:21 INFO dfs.DFSClient: Waiting to find target node:
192.168.253.20:50010
09/04/11 02:25:25 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Bad connect ack with firstBadLink 192.168.253.41:50010
09/04/11 02:25:25 INFO dfs.DFSClient: Abandoning block
blk_6143739150500056332_1379
09/04/11 02:25:25 INFO dfs.DFSClient: Waiting to find target node:
192.168.253.20:50010
09/04/11 02:25:30 INFO dfs.DFSClient: Exception in createBlockOutputStream
java.io.IOException: Bad connect ack with firstBadLink 192.168.253.41:50010
09/04/11 02:25:30 INFO dfs.DFSClient: Abandoning block
blk_5626187863612769755_1379

Any idea what it means, and should I be concerned about it.

Regards.