[HBASE-1256] NPE in StoreFileScanner durring cache flush

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.19.0
• Fix Version/s: 0.19.1
• Component/s: regionserver

Environment

latest branch of 0.19 with some unrelated transactional fixes.

Master, regionserver, and client all in the same JVM

• Assignee: Unassigned
• Reporter: Clint Morgan
• Created: 11/Mar/09 16:02
• Updated: 13/Sep/09 22:32
• Resolved: 12/Mar/09 00:00

Description

About an hour into a bulk upload I'm consistently getting:

org.apache.hadoop.hbase.DroppedSnapshotException: region: net_troove_coin_transaction_Transaction,,1236293201543
at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:902)
at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:795)
at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.flushRegion(MemcacheFlusher.java:228)
at org.apache.hadoop.hbase.regionserver.MemcacheFlusher.run(MemcacheFlusher.java:138)
Caused by: java.lang.NullPointerException
at org.apache.hadoop.hbase.regionserver.StoreFileScanner.findFirstRow(StoreFileScanner.java:314)
at org.apache.hadoop.hbase.regionserver.StoreFileScanner.advance(StoreFileScanner.java:141)
at org.apache.hadoop.hbase.regionserver.StoreFileScanner.openReaders(StoreFileScanner.java:109)
at org.apache.hadoop.hbase.regionserver.StoreFileScanner.updateReaders(StoreFileScanner.java:413)
at org.apache.hadoop.hbase.regionserver.HStoreScanner.updateReaders(HStoreScanner.java:346)
at org.apache.hadoop.hbase.regionserver.HStore.notifyChangedReadersObservers(HStore.java:746)
at org.apache.hadoop.hbase.regionserver.HStore.updateReaders(HStore.java:731)
at org.apache.hadoop.hbase.regionserver.HStore.internalFlushCache(HStore.java:700)
at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:636)
at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:887)