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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-3996) DFS client should throw version mismatch errors in case of a changed functionality
Date Fri, 22 Aug 2008 05:38:44 GMT
DFS client should throw version mismatch errors in case of a changed functionality
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                 Key: HADOOP-3996
                 URL: https://issues.apache.org/jira/browse/HADOOP-3996
             Project: Hadoop Core
          Issue Type: Bug
          Components: dfs
            Reporter: Amar Kamat


I started a hadoop cluster, built with the (latest) trunk  and tried doing _dfs -put_ with
the (dfs) clients from the (older/stale) trunk. The client went ahead and tried to upload
the data onto the cluster and failed with the following error
{noformat}
-bash-3.00$ ./bin/hadoop dfs -put file file
08/08/22 05:11:06 INFO hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException:
Could not read from stream
08/08/22 05:11:06 INFO hdfs.DFSClient: Abandoning block blk_5748330682182803489_1002
08/08/22 05:11:12 INFO hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException:
Could not read from stream
08/08/22 05:11:12 INFO hdfs.DFSClient: Abandoning block blk_7482082538144151768_1002
08/08/22 05:11:18 INFO hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException:
Could not read from stream
08/08/22 05:11:18 INFO hdfs.DFSClient: Abandoning block blk_-3132217232090937466_1002
08/08/22 05:11:24 INFO hdfs.DFSClient: Exception in createBlockOutputStream java.io.IOException:
Could not read from stream
08/08/22 05:11:24 INFO hdfs.DFSClient: Abandoning block blk_-6473055472384366978_1002
08/08/22 05:11:30 WARN hdfs.DFSClient: DataStreamer Exception: java.io.IOException: Unable
to create new block.
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2504)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:1810)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:1990)

put: Filesystem closed
{noformat}

It would be better if somehow the client detects that its not *made* for this master and softly/simply
bail out.
----
Note that I *did not* do it on purpose but forgot to replace the older installation with the
newer one.

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