Ted Yu created HBASE-7764:
-----------------------------
Summary: Fix TestSnapshotCloneIndependence failure
Key: HBASE-7764
URL: https://issues.apache.org/jira/browse/HBASE-7764
Project: HBase
Issue Type: Bug
Reporter: Ted Yu
Assignee: Ted Yu
Here is log snippet for
TestSnapshotCloneIndependence#testOnlineSnapshotRegionOperationsIndependent
(pay attention to region 1360020297284.2e43e47a882d3cff601eb222cad41f20.):
{code}
2013-02-04 15:24:58,369 INFO
[MASTER_SERVER_OPERATIONS-10.11.2.194,61955,1360020289835-0]
handler.SplitRegionHandler(115): Handled SPLIT event;
parent=test1360020295791,,1360020295793.794d37c0445b61619b5056623228827d.
daughter
a=test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.daughter
b=test1360020295791,dgb,1360020297284.b87834cee60702d883aa287df6aaeaef.
...
2013-02-04 15:25:02,005 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
snapshot.FlushSnapshotSubprocedure$RegionSnapshotTask(78): Starting region
operation on test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.
2013-02-04 15:25:02,005 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
snapshot.FlushSnapshotSubprocedure$RegionSnapshotTask(81): Flush Snapshotting
region test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.
started...
2013-02-04 15:25:02,005 DEBUG [member:
'10.11.2.194,61958,1360020290064' subprocedure-pool3-thread-1]
snapshot.RegionServerSnapshotManager$SnapshotSubprocedurePool(318): Completed
2/3 local region snapshots.
2013-02-04 15:25:02,005 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
regionserver.HRegion(2485): Storing region-info for snapshot.
2013-02-04 15:25:02,006 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
util.FSUtils(166): Creating
file=hdfs://localhost:61942/user/tyu/hbase/.snapshot/.tmp/snapshot_test1360020295791/2e43e47a882d3cff601eb222cad41f20/.tmp/.regioninfo
with permission=rwxrwxrwx
2013-02-04 15:25:02,014 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
regionserver.HRegion(2489): Creating references for hfiles
2013-02-04 15:25:02,014 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
regionserver.HRegion(2502): Adding snapshot references for
[hdfs://localhost:61942/user/tyu/hbase/test1360020295791/2e43e47a882d3cff601eb222cad41f20/fam/946b75e5f0ba445aa1c646b8cbc87e02]
hfiles
2013-02-04 15:25:02,015 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
regionserver.HRegion(2516): Creating reference for file (1/1) :
hdfs://localhost:61942/user/tyu/hbase/test1360020295791/2e43e47a882d3cff601eb222cad41f20/fam/946b75e5f0ba445aa1c646b8cbc87e02
2013-02-04 15:25:02,017 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
snapshot.FlushSnapshotSubprocedure$RegionSnapshotTask(84): ... Flush
Snapshotting region
test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20. completed.
2013-02-04 15:25:02,017 DEBUG
[rs(10.11.2.194,61958,1360020290064)-snapshot-pool5-thread-1]
snapshot.FlushSnapshotSubprocedure$RegionSnapshotTask(86): Closing region
operation on test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.
...
2013-02-04 15:25:03,836 INFO [PRI IPC Server handler 7 on 61958]
regionserver.HRegionServer(3600): Splitting
test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.
2013-02-04 15:25:03,836 DEBUG [PRI IPC Server handler 7 on 61958]
regionserver.HStore(1686): cannot split because midkey is the same as first or
last row
2013-02-04 15:25:03,836 DEBUG [PRI IPC Server handler 7 on 61958]
regionserver.CompactSplitThread(172): Region
test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20. not
splittable because midkey=null
2013-02-04 15:25:03,837 DEBUG [main] catalog.CatalogTracker(231): Stopping
catalog tracker org.apache.hadoop.hbase.catalog.CatalogTracker@5c602d9d
2013-02-04 15:25:03,838 INFO [main] client.TestSnapshotCloneIndependence(307):
split requested for
test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.
2013-02-04 15:25:03,892 DEBUG [main] client.MetaScanner(199): Scanning .META.
starting at row=test1360020295791,,00000000000000 for max=2147483647 rows using
hconnection 0x53d9f80
2013-02-04 15:25:03,895 DEBUG [main] client.MetaScanner(252): Current INFO from
scan results = {NAME =>
'test1360020295791,,1360020295793.794d37c0445b61619b5056623228827d.',
STARTKEY => '', ENDKEY => '', ENCODED =>
794d37c0445b61619b5056623228827d, OFFLINE => true, SPLIT => true,}
2013-02-04 15:25:03,896 DEBUG [main] client.MetaScanner(252): Current INFO from
scan results = {NAME =>
'test1360020295791,,1360020295793.794d37c0445b61619b5056623228827d.',
STARTKEY => '', ENDKEY => '', ENCODED =>
794d37c0445b61619b5056623228827d, OFFLINE => true, SPLIT => true,}
2013-02-04 15:25:03,896 DEBUG [main]
client.MetaScanner$BlockingMetaScannerVisitor(441): blocking until region is in
META: test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.
2013-02-04 15:25:03,897 DEBUG [main] client.MetaScanner(252): Current INFO from
scan results = {NAME =>
'test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.',
STARTKEY => '', ENDKEY => 'dgb', ENCODED =>
2e43e47a882d3cff601eb222cad41f20,}
2013-02-04 15:25:03,898 DEBUG [main] client.MetaScanner(252): Current INFO from
scan results = {NAME =>
'test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.',
STARTKEY => '', ENDKEY => 'dgb', ENCODED =>
2e43e47a882d3cff601eb222cad41f20,}
2013-02-04 15:25:03,898 DEBUG [main] client.MetaScanner(252): Current INFO from
scan results = {NAME =>
'test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.',
STARTKEY => '', ENDKEY => 'dgb', ENCODED =>
2e43e47a882d3cff601eb222cad41f20,}
2013-02-04 15:25:03,898 DEBUG [main] client.MetaScanner(252): Current INFO from
scan results = {NAME =>
'test1360020295791,,1360020297284.2e43e47a882d3cff601eb222cad41f20.',
STARTKEY => '', ENDKEY => 'dgb', ENCODED =>
2e43e47a882d3cff601eb222cad41f20,}
{code}
In the code we choose the first region from the original table to split which
happens to be not splittable.
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