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https://issues.apache.org/jira/browse/HDFS-4168?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493462#comment-13493462
]
Jing Zhao commented on HDFS-4168:
---------------------------------
The NPE is because the pendingReplications has not been created before the
loadFSImage call. We thus can check if pendingReplications is null before
calling its remove method. Will run test first to verify.
> TestDFSUpgradeFromImage fails in branch-1
> -----------------------------------------
>
> Key: HDFS-4168
> URL: https://issues.apache.org/jira/browse/HDFS-4168
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Jing Zhao
>
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.removeBlocks(FSNamesystem.java:2212)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.removePathAndBlocks(FSNamesystem.java:2225)
> at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.unprotectedDelete(FSDirectory.java:645)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLog.loadFSEdits(FSEditLog.java:833)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSEdits(FSImage.java:1024)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:841)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.doUpgrade(FSImage.java:402)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:367)
> at
> org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:104)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:420)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:388)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:285)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:546)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1444)
> at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:278)
> at org.apache.hadoop.hdfs.MiniDFSCluster.<init>(MiniDFSCluster.java:173)
> at
> org.apache.hadoop.hdfs.TestDFSUpgradeFromImage.testUpgradeFromImage(TestDFSUpgradeFromImage.java:185)
> {noformat}
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