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From "Benoy Antony (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6797) Misleading LayoutVersion information during data node upgrade
Date Thu, 31 Jul 2014 18:45:39 GMT
Benoy Antony created HDFS-6797:
----------------------------------

             Summary: Misleading LayoutVersion information during data node upgrade
                 Key: HDFS-6797
                 URL: https://issues.apache.org/jira/browse/HDFS-6797
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
    Affects Versions: 2.4.1
            Reporter: Benoy Antony
            Assignee: Benoy Antony


Before upgrade, data node version was -55. The new data node version remained at -55. During
upgrade we got he following messages:

{code}
2014-07-15 12:59:55,253 INFO org.apache.hadoop.hdfs.server.common.Storage: Data-node version:
-55 and name-node layout version: -56
...
...
...
...
2014-07-15 12:59:56,479 INFO org.apache.hadoop.hdfs.server.common.Storage: Upgrading block
pool storage directory /hadoop/1/data1/current/BP-825373266-xx.xxx.xxx.xx-1379095203239.
   old LV = -55; old CTime = 1402508907789.
   new LV = -56; new CTime = 1405453914270
2014-07-15 13:00:07,697 INFO org.apache.hadoop.hdfs.server.common.Storage: Upgrade of block
pool BP-825373266-xx.xxx.xxx.xx-1379095203239 at /hadoop/12/data1/current/BP-825373266-xx.xxx.xxx.xx-1379095203239
is complete
2014-07-15 13:00:07,839 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Setting up storage:
nsid=859725752;bpid=BP-825373266-xx.xxx.xxx.xx-1379095203239;lv=-55;nsInfo=lv=-56;cid=CID-303ee504-e03c-4a5e-bc59-2b275b308152;nsid=859725752;c=1405453914270;bpid=BP-82537326
6-xx.xxx.xxx.xx-1379095203239;dnuuid=b1011b87-d7cd-48ce-92cc-f7cca0e8cbae
{code}

after upgrade completing, restart of DN still shows message regarding version difference:
{code}
INFO org.apache.hadoop.hdfs.server.common.Storage: Data-node version: -55 and name-node layout
version: -56
{code}
This causes confusion to the operators as if upgrade did not succeed since data node's layout
version is not updated to the "new LV" value

Actually name node's layout version is displayed as the "new LV" value.
Since the data node and name node layout versions are separate now, the new data node layout
version should be shown as the “new LV”.  





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