[HBASE-3224] NPE in KeyValue$KVComparator.compare when compacting

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 0.90.0
• Hadoop Flags: Reviewed
• Assignee: ryan rawson
• Reporter: Jean-Daniel Cryans
• Created: 11/Nov/10 01:00
• Updated: 20/Nov/15 12:41
• Resolved: 12/Nov/10 01:24

Description

While testing normal insertion via PE, I got this recurrent NPE coming out of KeyValue$KVComparator.compare while it's compacting. So far I saw 2 different stack traces:

java.lang.NullPointerException
	at org.apache.hadoop.hbase.KeyValue$KVComparator.compare(KeyValue.java:1356)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.java:250)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:385)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:291)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:324)
	at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:926)
	at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:734)

java.lang.NullPointerException
	at org.apache.hadoop.hbase.KeyValue$KVComparator.compare(KeyValue.java:1375)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:180)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:156)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:146)
	at java.util.PriorityQueue.siftUpUsingComparator(PriorityQueue.java:594)
	at java.util.PriorityQueue.siftUp(PriorityQueue.java:572)
	at java.util.PriorityQueue.offer(PriorityQueue.java:274)
	at java.util.PriorityQueue.add(PriorityQueue.java:251)
	at org.apache.hadoop.hbase.regionserver.KeyValueHeap.reseek(KeyValueHeap.java:258)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:385)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:291)
	at org.apache.hadoop.hbase.regionserver.StoreScanner.next(StoreScanner.java:324)
	at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:926)

	at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:734)