[HBASE-11794] StripeStoreFlusher causes NullPointerException

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.98.3, 0.98.4, 0.98.5
• Fix Version/s: 0.99.0, 0.98.6
• Component/s: Compaction
• Hadoop Flags: Reviewed
• Tags: stripe compaction
• Assignee: jeongmin kim
• Reporter: jeongmin kim
• Created: 21/Aug/14 07:26
• Updated: 06/Apr/18 17:50
• Resolved: 23/Aug/14 17:59

Description

StoreFlusher.flushSnapshot() mustn't return null value.
But StripeStoreFlusher.flushSnapshot() does.

It cause NullPointerException at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:802)
and this makes regions dead after exhaustive retries and no recovery available from it.

the code (StripeStoreFlusher:64) has to be changed
===============
from
List<Path> result = null
to
List<Path> result = new ArrayList<Path>();
===============
to return a empty list not null value.