[HBASE-12535] NPE in WALFactory close under contention for getInstance

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Replication, wal
• Hadoop Flags: Reviewed
• Assignee: Sean Busbey
• Reporter: Michael Stack
• Created: 19/Nov/14 16:13
• Updated: 17/Jun/22 18:37
• Resolved: 19/Nov/14 22:40

Description

From trunk build last night....

https://builds.apache.org/view/H-L/view/HBase/job/HBase-TRUNK/5796/consoleText

...
2014-11-19 09:23:06,000 ERROR [RS:0;asf900:49047.replicationSource,2] regionserver.ReplicationSource$1(778): Unexpected exception in ReplicationSource, currentPath=hdfs://localhost:53151/user/jenkins/hbase/WALs/asf900.gq1.ygridcore.net,49047,1416388982221/asf900.gq1.ygridcore.net%2C49047%2C1416388982221.default.1416388983009
java.lang.NullPointerException
	at org.apache.hadoop.hbase.wal.WALFactory.close(WALFactory.java:190)
	at org.apache.hadoop.hbase.wal.WALFactory.getInstance(WALFactory.java:365)
	at org.apache.hadoop.hbase.wal.WALFactory.createReader(WALFactory.java:382)
	at org.apache.hadoop.hbase.replication.regionserver.ReplicationWALReaderManager.openReader(ReplicationWALReaderManager.java:69)
	at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.openReader(ReplicationSource.java:518)
	at org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:331)
2014-11-19 09:23:06,006 INFO  [M:0;asf900:60818] wal.FSHLog(543): WAL configuration: blocksize=128 MB, rollsize=39.32 KB, 
...

You want to take a looksee busbey?

Issue Links

• is depended upon by: HBASE-12522 Backport WAL refactoring to branch-1