delete table followed by recreation results in honked table
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Key: HBASE-826
URL: https://issues.apache.org/jira/browse/HBASE-826
Project: Hadoop HBase
Issue Type: Bug
Reporter: stack
Priority: Blocker
Fix For: 0.2.1, 0.3.0
Daniel Leffel suspected that delete and then recreate causes issues. I tried
it on our little cluster. I'm doing a MR load up into the newly created table
and after a few million rows, the MR job just hangs. Its looking for a region
that doesn't exist:
{code}
2008-08-13 03:32:36,840 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
Initializing JVM Metrics with processName=MAP, sessionId=
2008-08-13 03:32:36,940 INFO org.apache.hadoop.mapred.MapTask: numReduceTasks: 1
2008-08-13 03:32:37,420 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Found ROOT
REGION => {NAME => '-ROOT-,,0', STARTKEY => '', ENDKEY => '', ENCODED =>
70236052, TABLE => {{NAME => '-ROOT-', IS_ROOT => 'true', IS_META => 'true',
FAMILIES => [{NAME => 'info', BLOOMFILTER => 'false', COMPRESSION => 'NONE',
VERSIONS => '1', LENGTH => '2147483647', TTL => '-1', IN_MEMORY => 'false',
BLOCKCACHE => 'false'}]}}
2008-08-13 03:32:37,541 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: reloading table
servers because: HRegionInfo was null or empty in .META.
2008-08-13 03:32:37,541 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Removed
.META.,,1 from cache because of TestTable,0008388608,99999999999999
2008-08-13 03:32:37,544 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Found ROOT
REGION => {NAME => '-ROOT-,,0', STARTKEY => '', ENDKEY => '', ENCODED =>
70236052, TABLE => {{NAME => '-ROOT-', IS_ROOT => 'true', IS_META => 'true',
FAMILIES => [{NAME => 'info', BLOOMFILTER => 'false', COMPRESSION => 'NONE',
VERSIONS => '1', LENGTH => '2147483647', TTL => '-1', IN_MEMORY => 'false',
BLOCKCACHE => 'false'}]}}
2008-08-13 03:32:47,605 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: reloading table
servers because: HRegionInfo was null or empty in .META.
2008-08-13 03:32:47,606 DEBUG
org.apache.hadoop.hbase.client.HConnectionManager$TableServers: Removed
.META.,,1 from cache because of TestTable,0008388608,99999999999999
....
{code}
My guess is that its a region that was in the tables' previous incarnation with
ghosts left over down inside .META.
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