ShiXing created HBASE-6327:
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Summary: HLog can be null when create table
Key: HBASE-6327
URL: https://issues.apache.org/jira/browse/HBASE-6327
Project: HBase
Issue Type: Bug
Reporter: ShiXing
Assignee: ShiXing
Attachments: createTableFailedMaster.log
As HBASE-4010 discussed, the HLog can be null.
We have meet createTable failed because the no use hlog.
When createHReagion, the HLog.LogSyncer is run sync(), in under layer it call
the DFSClient.DFSOutputStream.sync().
Then the hlog.closeAndDelete() was called，firstly the HLog.close() will
interrupt the LogSyncer, and interrupt DFSClient.DFSOutputStream.sync().The
DFSClient.DFSOutputStream will store the exception and throw it when we called
DFSClient.close().
The HLog.close() call the writer.close()/DFSClient.close() after interrupt the
LogSyncer. And there is no catch exception for the close().
So the Master throw exception to the client. There is no need to throw this
exception, further， the hlog is no use.
Our cluster is 0.90, the logs is attached, after "closing hlog writer", there
is no log for the createTable().
The trunk and 0.92, 0.94, we used just one hlog, and if the exception happends,
the client will got createTable failed, but indeed ,all the regions for the
table can also be assigned.
I will give the patch for this later.
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