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https://issues.apache.org/jira/browse/HADOOP-2668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12560780#action_12560780
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stack commented on HADOOP-2668:
-------------------------------
I removed the hbase dir completely. Restarted. Came up nice. Shut it down.
Remove the hbase.version and .hbase.version.crc. Tried to start it. It
complained no version file. Run migration. I did and it made following
emissions:
{code}
08/01/19 23:17:56 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:60000. Already tried 1 time(s).08/01/19 23:17:57 INFO
ipc.Client: Retrying connect to server: localhost/127.0.0.1:60000. Already
tried 2 time(s).08/01/19 23:17:58 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:60000. Already tried 3 time(s).08/01/19 23:17:59 INFO
ipc.Client: Retrying connect to server: localhost/127.0.0.1:60000. Already
tried 4 time(s).08/01/19 23:18:00 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:60000. Already tried 5 time(s).08/01/19 23:18:01 INFO
ipc.Client: Retrying connect to server: localhost/127.0.0.1:60000. Already
tried 6 time(s).08/01/19 23:18:02 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:60000. Already tried 7 time(s).08/01/19 23:18:03 INFO
ipc.Client: Retrying connect to server: localhost/127.0.0.1:60000. Already
tried 8 time(s).08/01/19 23:18:04 INFO ipc.Client: Retrying connect to server:
localhost/127.0.0.1:60000. Already tried 9 time(s).08/01/19 23:18:05 INFO
ipc.Client: Retrying connect to server: localhost/127.0.0.1:60000. Already
tried 10 time(s).08/01/19 23:18:06 INFO util.Migrate: unrecognized file -ROOT-
ignoring08/01/19 23:18:06 INFO util.Migrate: unrecognized file .META.
ignoring08/01/19 23:18:06 ERROR util.Migrate: exiting due to
errorjava.io.IOException: cannot find root region
file:/tmp/hadoop-stack/hbase/hregion_70236052 at
org.apache.hadoop.hbase.util.Migrate.run(Migrate.java:156) at
org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at
org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) at
org.apache.hadoop.hbase.util.Migrate.main(Migrate.java:450)
{code}
Odd is that there is not hregion_70236052 file:
{code}
$ ls -la /tmp/hadoop-stack/hbase/
total 0
drwxr-xr-x 3 stack wheel 102 Jan 19 23:16 -ROOT-
drwxr-xr-x 4 stack wheel 136 Jan 19 23:17 .
drwxr-xr-x 3 stack wheel 102 Jan 19 23:16 ..
drwxr-xr-x 3 stack wheel 102 Jan 19 23:16 .META.
{code}
> [hbase] Documentation and improved logging so fact that hbase now requires
> migration comes as less of a surprise
> ----------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-2668
> URL: https://issues.apache.org/jira/browse/HADOOP-2668
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Reporter: stack
> Assignee: stack
> Priority: Blocker
> Fix For: 0.16.0
>
> Attachments: migrate.patch
>
>
> Hbase now checks for a version file. If none, it reports a version mismatch.
> There will be no version file if the hbase was made by a version older than
> r613469
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