[HADOOP-3520] Generation stamp upgrade fails TestDFSUpgradeFromImage

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.18.0
• Fix Version/s: 0.18.0
• Hadoop Flags: Reviewed
• Assignee: Dhruba Borthakur
• Reporter: Konstantin Shvachko
• Created: 09/Jun/08 23:12
• Updated: 08/Jul/09 16:43
• Resolved: 18/Jun/08 19:22

Description

TestDFSUpgradeFromImage occasionally fails doing distributed upgrade related to generation stamps with the following NPE:

java.lang.NullPointerException
	at org.apache.hadoop.dfs.UpgradeManagerDatanode.initializeUpgrade(UpgradeManagerDatanode.java:54)
	at org.apache.hadoop.dfs.DataStorage.verifyDistributedUpgradeProgress(DataStorage.java:402)
	at org.apache.hadoop.dfs.DataStorage.doTransition(DataStorage.java:232)
	at org.apache.hadoop.dfs.DataStorage.recoverTransitionRead(DataStorage.java:139)
	at org.apache.hadoop.dfs.DataNode.startDataNode(DataNode.java:268)
	at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:185)
	at org.apache.hadoop.dfs.DataNode.makeInstance(DataNode.java:2952)
	at org.apache.hadoop.dfs.DataNode.instantiateDataNode(DataNode.java:2907)
	at org.apache.hadoop.dfs.MiniDFSCluster.startDataNodes(MiniDFSCluster.java:401)
	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:267)
	at org.apache.hadoop.dfs.MiniDFSCluster.<init>(MiniDFSCluster.java:162)
	at org.apache.hadoop.dfs.TestDFSUpgradeFromImage.testUpgradeFromImage(TestDFSUpgradeFromImage.java:180)