[HBASE-7507] Make memstore flush be able to retry after exception

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.94.6, 0.95.0
• Fix Version/s: 0.94.6, 0.95.0
• Hadoop Flags: Reviewed
• Assignee: Chunhui Shen
• Reporter: Chunhui Shen
• Created: 07/Jan/13 10:30
• Updated: 12/Apr/13 04:15
• Resolved: 25/Feb/13 20:55

Description

We will abort regionserver if memstore flush throws exception.

I thinks we could do retry to make regionserver more stable because file system may be not ok in a transient time. e.g. Switching namenode in the NamenodeHA environment

HRegion#internalFlushcache(){

...
try {
...
}catch(Throwable t){
DroppedSnapshotException dse = new DroppedSnapshotException("region: " +
          Bytes.toStringBinary(getRegionName()));
dse.initCause(t);
throw dse;
}
...

}

MemStoreFlusher#flushRegion(){
...
region.flushcache();
...
 try {
}catch(DroppedSnapshotException ex){
server.abort("Replay of HLog required. Forcing server shutdown", ex);
}

...
}

Issue Links

• is duplicated by: HBASE-7385 Do not abort regionserver if StoreFlusher.flushCache() fails
• relates to: HBASE-7929 Reapply hbase-7507 "Make memstore flush be able to retry after exception" to 0.94 branch.