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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-964) Startup stuck "waiting for root region"
Date Mon, 27 Oct 2008 22:25:44 GMT
Startup stuck "waiting for root region"
---------------------------------------

                 Key: HBASE-964
                 URL: https://issues.apache.org/jira/browse/HBASE-964
             Project: Hadoop HBase
          Issue Type: Bug
         Environment: TRUNK
            Reporter: stack
            Assignee: Jim Kellerman


Seems easy to reproduce.

I am trying to start a master then start a regionserver.  I'm using local filesystem.

I start master like this:

{code}
./bin/hbase master start
{code}

The regionserver similarly.

All comes up. Then I try to run sequentialWriter from PE.

Here is what shows in master log:

{code}
...
08/10/27 15:20:00 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:02 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:04 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:06 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:06 INFO master.BaseScanner: RegionManager.rootScanner scanning meta region
{regionname: -ROOT-,,0, startKey: <>, server: 208.84.6.64:60020}
08/10/27 15:20:07 DEBUG master.BaseScanner: RegionManager.rootScanner REGION => {NAME =>
'.META.,,1', STARTKEY => '', ENDKEY => '', ENCODED => 1028785192, TABLE => {{NAME
=> '.META.', IS_ROOT => 'false', IS_META => 'true', FAMILIES => [{NAME => 'info',
BLOOMFILTER => 'false', VERSIONS => '1', COMPRESSION => 'NONE', LENGTH => '2147483647',
TTL => '-1', IN_MEMORY => 'false', BLOCKCACHE => 'false'}, {NAME => 'historian',
BLOOMFILTER => 'false', VERSIONS => '2147483647', COMPRESSION => 'NONE', LENGTH =>
'2147483647', TTL => '-1', IN_MEMORY => 'false', BLOCKCACHE => 'false'}]}}}, SERVER
=> '208.84.6.64:60020', STARTCODE => 1225145942330
08/10/27 15:20:07 INFO master.BaseScanner: RegionManager.rootScanner scan of meta region {regionname:
-ROOT-,,0, startKey: <>, server: 208.84.6.64:60020} complete
08/10/27 15:20:08 DEBUG client.HConnectionManager$TableServers: Attempt 0 of 10 failed with
<org.apache.hadoop.hbase.client.NoServerForRegionException: Timed out trying to locate
root region>. Retrying after sleep of 2000
08/10/27 15:20:08 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:10 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
...
{code}


Here is the regionserver log:

{code}
....
08/10/27 15:19:09 DEBUG regionserver.CompactSplitThread: Compaction requested for region:
.META.,,1
08/10/27 15:19:09 INFO regionserver.HRegion: starting compaction on region .META.,,1
08/10/27 15:19:09 INFO regionserver.HRegion: compaction completed on region .META.,,1 in 0sec
08/10/27 15:19:48 INFO regionserver.HRegionServer: MSG_REGION_OPEN: TestTable,,1225145988632
08/10/27 15:19:48 INFO regionserver.HRegionServer: MSG_REGION_OPEN: TestTable,,1225145988632
08/10/27 15:19:48 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:19:50 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:19:52 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:19:54 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:19:56 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:19:58 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:00 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:02 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:04 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:07 DEBUG client.HConnectionManager$TableServers: Sleeping 2000ms, waiting for
root region.
08/10/27 15:20:09 DEBUG client.HConnectionManager$TableServers: Attempt 0 of 10 failed with
<org.apache.hadoop.hbase.client.NoServerForRegionException: Timed out trying to locate
root region>. Retrying after sleep of 2000

...
{code}

and so on.

Giving to Jim since he was hereabouts most recently.

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