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https://issues.apache.org/jira/browse/HADOOP-3520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12606355#action_12606355
]
Hudson commented on HADOOP-3520:
--------------------------------
Integrated in Hadoop-trunk #523 (See
[http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/523/])
> Generation stamp upgrade fails TestDFSUpgradeFromImage
> ------------------------------------------------------
>
> Key: HADOOP-3520
> URL: https://issues.apache.org/jira/browse/HADOOP-3520
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.18.0
> Reporter: Konstantin Shvachko
> Assignee: dhruba borthakur
> Priority: Blocker
> Fix For: 0.18.0
>
> Attachments: failure.log, upgradeNPE.patch
>
>
> TestDFSUpgradeFromImage occasionally fails doing distributed upgrade related
> to generation stamps with the following NPE:
> {code}
> 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)
> {code}
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