> On 2010-08-10 21:34:40, stack wrote:
> > src/main/java/org/apache/hadoop/hbase/master/HMaster.java, line 234
> > <http://review.cloudera.org/r/467/diff/3/?file=6015#file6015line234>
> >
> >     You might want to check the returns from these methods.

Snapshot root dir might already exist, e.g. created in previous start up, then 
mkdirs would return false. But this is normal.

Here are previous comments from Todd:
you can just call mkdirs, I think, and it won't fail if it already exists


- Chongxin


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On 2010-08-09 03:52:11, Chongxin Li wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://review.cloudera.org/r/467/
> -----------------------------------------------------------
> 
> (Updated 2010-08-09 03:52:11)
> 
> 
> Review request for hbase.
> 
> 
> Summary
> -------
> 
> This patch includes the first three sub-tasks of HBASE-50:
> 1. Start and monitor the creation of snapshot via ZooKeeper
> 2. Create snapshot of an HBase table
> 3. Some existing functions of HBase are modified to support snapshot
> 
> Currently snapshots can be created as expected, but can not be restored or 
> deleted yet
> 
> 
> This addresses bug HBASE-50.
>     http://issues.apache.org/jira/browse/HBASE-50
> 
> 
> Diffs
> -----
> 
>   src/main/java/org/apache/hadoop/hbase/HConstants.java c77ebf5 
>   src/main/java/org/apache/hadoop/hbase/HRegionInfo.java ee94690 
>   src/main/java/org/apache/hadoop/hbase/HSnapshotDescriptor.java PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java 0d57270 
>   src/main/java/org/apache/hadoop/hbase/SnapshotExistsException.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/TablePartialOpenException.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java 8b01aa0 
>   src/main/java/org/apache/hadoop/hbase/io/HalfStoreFileReader.java ed12e7a 
>   src/main/java/org/apache/hadoop/hbase/io/HbaseObjectWritable.java 85fde3a 
>   src/main/java/org/apache/hadoop/hbase/io/Reference.java 219203c 
>   src/main/java/org/apache/hadoop/hbase/io/hfile/HFile.java b2de7e4 
>   src/main/java/org/apache/hadoop/hbase/ipc/HBaseRPCProtocolVersion.java 
> d4bcbed 
>   src/main/java/org/apache/hadoop/hbase/ipc/HMasterInterface.java bd48a4b 
>   src/main/java/org/apache/hadoop/hbase/mapreduce/LoadIncrementalHFiles.java 
> 1183584 
>   src/main/java/org/apache/hadoop/hbase/master/BaseScanner.java 69eab39 
>   src/main/java/org/apache/hadoop/hbase/master/DeleteSnapshot.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/master/HMaster.java e4bd30d 
>   src/main/java/org/apache/hadoop/hbase/master/LogsCleaner.java 9d1a8b8 
>   src/main/java/org/apache/hadoop/hbase/master/RestoreSnapshot.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/master/SnapshotLogCleaner.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/master/SnapshotMonitor.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/master/SnapshotOperation.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/master/SnapshotTracker.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/master/TableDelete.java 1153e62 
>   src/main/java/org/apache/hadoop/hbase/master/TableSnapshot.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java 6dc41a4 
>   src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java 
> 6a54736 
>   src/main/java/org/apache/hadoop/hbase/regionserver/SnapshotThread.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/regionserver/Store.java ae9e190 
>   src/main/java/org/apache/hadoop/hbase/regionserver/StoreFile.java 757a50c 
>   src/main/java/org/apache/hadoop/hbase/regionserver/ZKSnapshotWatcher.java 
> PRE-CREATION 
>   src/main/java/org/apache/hadoop/hbase/regionserver/wal/HLog.java 9593286 
>   
> src/main/java/org/apache/hadoop/hbase/replication/master/ReplicationLogCleaner.java
>  4d4b00a 
>   src/main/java/org/apache/hadoop/hbase/util/FSUtils.java 5cf3481 
>   src/main/java/org/apache/hadoop/hbase/zookeeper/ZooKeeperWrapper.java 
> 3827fa5 
>   src/main/resources/hbase-default.xml b73f0ff 
>   src/test/java/org/apache/hadoop/hbase/HBaseTestingUtility.java 4d09fe9 
>   src/test/java/org/apache/hadoop/hbase/client/TestAdmin.java c9b78b9 
>   src/test/java/org/apache/hadoop/hbase/master/TestSnapshot.java PRE-CREATION 
>   src/test/java/org/apache/hadoop/hbase/master/TestSnapshotFailure.java 
> PRE-CREATION 
>   src/test/java/org/apache/hadoop/hbase/regionserver/TestCompaction.java 
> 34b8044 
>   src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegion.java 98bd3e5 
>   src/test/java/org/apache/hadoop/hbase/regionserver/TestHRegionSnapshot.java 
> PRE-CREATION 
>   src/test/java/org/apache/hadoop/hbase/regionserver/TestStoreFile.java 
> 38ef520 
>   
> src/test/java/org/apache/hadoop/hbase/regionserver/TestZKSnapshotWatcher.java 
> PRE-CREATION 
> 
> Diff: http://review.cloudera.org/r/467/diff
> 
> 
> Testing
> -------
> 
> Unit tests and integration tests with mini cluster passed.
> 
> 
> Thanks,
> 
> Chongxin
> 
>

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