[#HADOOP-3509] FSNamesystem.close() throws NullPointerException

Hadoop Common

FSNamesystem.close() throws NullPointerException

Created: 06/Jun/08 07:22 PM Updated: 22/Aug/08 07:50 PM

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Component/s:

None

Affects Version/s:

None

Fix Version/s:

0.18.0

Time Tracking:

Not Specified

File Attachments:

File Name	Date Attached	Attached By	Size
3509_20080606.patch	2008-06-06 07:43 PM	Tsz Wo (Nicholas), SZE	2 kB
3509_20080606b.patch	2008-06-06 10:47 PM	Tsz Wo (Nicholas), SZE	3 kB
3509_20080606c.patch	2008-06-06 11:06 PM	Tsz Wo (Nicholas), SZE	3 kB

Hadoop Flags:	Reviewed
Resolution Date:	07/Jun/08 12:01 AM

Description

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During NameNode startup, if there is an exception thrown before FSNamesystem.dir is created, we will get a NullPointerException.

2008-06-06 12:07:21,203 ERROR org.apache.hadoop.dfs.NameNode: java.lang.NullPointerException
	at org.apache.hadoop.dfs.FSNamesystem.close(FSNamesystem.java:465)
	at org.apache.hadoop.dfs.FSNamesystem.<init>(FSNamesystem.java:253)
	at org.apache.hadoop.dfs.NameNode.initialize(NameNode.java:148)
	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:193)
	at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:179)
	at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:822)
	at org.apache.hadoop.dfs.NameNode.main(NameNode.java:831)

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Repository	Revision	Date	User	Message
ASF	#664202	Fri Jun 06 23:52:32 UTC 2008	shv	~~HADOOP-3509~~. Fix NPE in FSNamesystem.close. Contributed by Tsz Wo (Nicholas), SZE.
				Files Changed
				MODIFY /hadoop/core/trunk/src/java/org/apache/hadoop/dfs/FSDirectory.java MODIFY /hadoop/core/trunk/src/java/org/apache/hadoop/dfs/FSNamesystem.java MODIFY /hadoop/core/trunk/CHANGES.txt MODIFY /hadoop/core/trunk/src/java/org/apache/hadoop/io/IOUtils.java