[HBASE-4562] When split doing offlineParentInMeta encounters error, it'll cause data loss

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.90.4
• Fix Version/s: 0.90.5
• Component/s: regionserver
• Hadoop Flags: Reviewed
• Assignee: bluedavy
• Reporter: bluedavy
• Created: 10/Oct/11 03:04
• Updated: 20/Nov/15 11:53
• Resolved: 17/Oct/11 22:40

Description

Follow below steps to replay the problem:
1. change the SplitTransaction.java as below,just like mock the timeout error.

SplitTransaction.java

      if (!testing) {
        MetaEditor.offlineParentInMeta(server.getCatalogTracker(),
           this.parent.getRegionInfo(), a.getRegionInfo(), b.getRegionInfo());
        throw new IOException("some unexpected error in split");
      }
   

2. update the regionserver code,restart;
3. create a table & put some data to the table;
4. split the table;
5. kill the regionserver hosted the table;
6. wait some time after master ServerShutdownHandler.process execute,then scan the table,u'll find the data wrote before lost.

We can fix the bug just use the patch.