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https://issues.apache.org/jira/browse/HDFS-6696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14064180#comment-14064180
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Kihwal Lee edited comment on HDFS-6696 at 7/16/14 9:56 PM:
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Here is the stack trace.
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java.io.FileNotFoundException: File does not exist: /xxx/yyy/.snapshot/zzz/aaa
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:65)
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:55)
at
org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadFilesUnderConstruction(FSImageFormat.java:937)
at
org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.load(FSImageFormat.java:424)
at
org.apache.hadoop.hdfs.server.namenode.FSImageFormat$LoaderDelegator.load(FSImageFormat.java:230)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:902)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:888)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImageFile(FSImage.java:711)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:649)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.doUpgrade(FSImage.java:359)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:259)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:894)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:641)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:526)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:582)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:747)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:731)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1381)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1447)
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was (Author: kihwal):
{panel}
java.io.FileNotFoundException: File does not exist: /xxx/yyy/.snapshot/zzz/aaa
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:65)
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:55)
at
org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadFilesUnderConstruction(FSImageFormat.java:937)
at
org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.load(FSImageFormat.java:424)
at
org.apache.hadoop.hdfs.server.namenode.FSImageFormat$LoaderDelegator.load(FSImageFormat.java:230)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:902)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:888)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImageFile(FSImage.java:711)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:649)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.doUpgrade(FSImage.java:359)
at
org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:259)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:894)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:641)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:526)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:582)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:747)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:731)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1381)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1447)
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> Name node cannot start if the path of a file under construction contains
> ".snapshot"
> ------------------------------------------------------------------------------------
>
> Key: HDFS-6696
> URL: https://issues.apache.org/jira/browse/HDFS-6696
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Kihwal Lee
> Assignee: Andrew Wang
> Priority: Blocker
>
> Using {{-renameReserved}} to rename ".snapshot" in a pre-hdfs-snapshot
> feature fsimage during upgrade only works, if there is nothing under
> construction under the renamed directory. I am not sure whether it takes
> care of edits containing ".snapshot" properly.
> The workaround is to identify these directories and rename, then do
> {{saveNamespace}} before performing upgrade.
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