Benoy Antony created HDFS-6797:
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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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