[HBASE-14257] Periodic flusher only handles hbase:meta, not other system tables

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.2.0, 2.0.0
• Fix Version/s: 1.2.0, 1.3.0, 2.0.0
• Component/s: regionserver
• Labels: beginner
• Hadoop Flags: Reviewed
• Release Note: Memstore periodic flusher used to flush META table every 5 minutes but not any other system tables. This jira extends it to flush all system tables within this time period.
• Assignee: Abhishek Singh Chouhan
• Reporter: Lars George
• Created: 19/Aug/15 16:46
• Updated: 01/Jul/22 20:58
• Resolved: 27/Oct/15 06:55

Description

In HRegion.shouldFlush we have

    long modifiedFlushCheckInterval = flushCheckInterval;
    if (getRegionInfo().isMetaRegion() &&
        getRegionInfo().getReplicaId() == HRegionInfo.DEFAULT_REPLICA_ID) {
      modifiedFlushCheckInterval = META_CACHE_FLUSH_INTERVAL;
    }

That method is called by the PeriodicMemstoreFlusher thread, and prefers the hbase:meta only for faster flushing. It should be doing the same for other system tables. I suggest to use HRI.isSystemTable().