[HBASE-4673] NPE in HFileReaderV2.close during major compaction when hfile.block.cache.size is set to 0

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.94.0
• Fix Version/s: 0.92.0, 0.94.0
• Hadoop Flags: Reviewed
• Assignee: Lars Hofhansl
• Reporter: Lars Hofhansl
• Created: 25/Oct/11 21:06
• Updated: 12/Oct/12 05:35
• Resolved: 26/Oct/11 22:11

Description

On a test system got this exception when hfile.block.cache.size is set to 0:

java.lang.NullPointerException
at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.close(HFileReaderV2.java:321)
at org.apache.hadoop.hbase.regionserver.StoreFile$Reader.close(StoreFile.java:1065)
at org.apache.hadoop.hbase.regionserver.StoreFile.closeReader(StoreFile.java:539)
at org.apache.hadoop.hbase.regionserver.StoreFile.deleteReader(StoreFile.java:549)
at org.apache.hadoop.hbase.regionserver.Store.completeCompaction(Store.java:1314)
at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:686)
at org.apache.hadoop.hbase.regionserver.HRegion.compact(HRegion.java:1016)
at org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest.run(CompactionRequest.java:178)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)

Minor issue as nobody in their right mind with have hfile.block.cache.size=0

Looks like this is due to HBASE-4422