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https://issues.apache.org/jira/browse/HDFS-15792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17280749#comment-17280749
]
Renukaprasad C commented on HDFS-15792:
---------------------------------------
Thanks you very much [~hexiaoqiao],[~sodonnell] for the quick review, valueable
effors & feeback.
> ClasscastException while loading FSImage
> ----------------------------------------
>
> Key: HDFS-15792
> URL: https://issues.apache.org/jira/browse/HDFS-15792
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nn
> Reporter: Renukaprasad C
> Assignee: Renukaprasad C
> Priority: Major
> Fix For: 3.3.1, 3.4.0, 2.10.2
>
> Attachments: HDFS-15792-branch-2.10.001.patch,
> HDFS-15792-branch-2.10.002.patch, HDFS-15792-branch-2.10.003.patch,
> HDFS-15792-branch-2.10.004.patch, HDFS-15792.001.patch, HDFS-15792.002.patch,
> HDFS-15792.003.patch, HDFS-15792.004.patch, HDFS-15792.005.patch,
> HDFS-15792.addendum.001.patch, image-2021-01-27-12-00-34-846.png
>
>
> FSImage loading has failed with ClasscastException -
> java.lang.ClassCastException: java.util.HashMap$Node cannot be cast to
> java.util.HashMap$TreeNode.
> This is the usage issue with Hashmap in concurrent scenarios.
> Same issue has been reported on Java & closed as usage issue. -
> https://bugs.openjdk.java.net/browse/JDK-8173671
> 2020-12-28 11:36:26,127 | ERROR | main | An exception occurred when loading
> INODE from fsiamge. | FSImageFormatProtobuf.java:442
> java.lang.
> : java.util.HashMap$Node cannot be cast to java.util.HashMap$TreeNode
> at java.util.HashMap$TreeNode.moveRootToFront(HashMap.java:1835)
> at java.util.HashMap$TreeNode.treeify(HashMap.java:1951)
> at java.util.HashMap.treeifyBin(HashMap.java:772)
> at java.util.HashMap.putVal(HashMap.java:644)
> at java.util.HashMap.put(HashMap.java:612)
> at
> org.apache.hadoop.hdfs.util.ReferenceCountMap.put(ReferenceCountMap.java:53)
> at
> org.apache.hadoop.hdfs.server.namenode.AclStorage.addAclFeature(AclStorage.java:391)
> at
> org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields.addAclFeature(INodeWithAdditionalFields.java:349)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.loadINodeDirectory(FSImageFormatPBINode.java:225)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.loadINode(FSImageFormatPBINode.java:406)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.readPBINodes(FSImageFormatPBINode.java:367)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.loadINodeSection(FSImageFormatPBINode.java:342)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader$2.call(FSImageFormatProtobuf.java:469)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> 2020-12-28 11:36:26,130 | ERROR | main | Failed to load image from
> FSImageFile(file=/srv/BigData/namenode/current/fsimage_0000000000198227480,
> cpktTxId=0000000000198227480) | FSImage.java:738
> java.io.IOException: java.lang.ClassCastException: java.util.HashMap$Node
> cannot be cast to java.util.HashMap$TreeNode
> at
> org.apache.hadoop.io.MultipleIOException$Builder.add(MultipleIOException.java:68)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader.runLoaderTasks(FSImageFormatProtobuf.java:444)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader.loadInternal(FSImageFormatProtobuf.java:360)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader.load(FSImageFormatProtobuf.java:263)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormat$LoaderDelegator.load(FSImageFormat.java:227)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:971)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:955)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImageFile(FSImage.java:820)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:733)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:331)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1113)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:730)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:648)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:710)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:953)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:926)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1665)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1735)
> Caused by: java.lang.ClassCastException: java.util.HashMap$Node cannot be
> cast to java.util.HashMap$TreeNode
> at java.util.HashMap$TreeNode.moveRootToFront(HashMap.java:1835)
> at java.util.HashMap$TreeNode.treeify(HashMap.java:1951)
> at java.util.HashMap.treeifyBin(HashMap.java:772)
> at java.util.HashMap.putVal(HashMap.java:644)
> at java.util.HashMap.put(HashMap.java:612)
> at
> org.apache.hadoop.hdfs.util.ReferenceCountMap.put(ReferenceCountMap.java:53)
> at
> org.apache.hadoop.hdfs.server.namenode.AclStorage.addAclFeature(AclStorage.java:391)
> at
> org.apache.hadoop.hdfs.server.namenode.INodeWithAdditionalFields.addAclFeature(INodeWithAdditionalFields.java:349)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.loadINodeDirectory(FSImageFormatPBINode.java:225)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.loadINode(FSImageFormatPBINode.java:406)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.readPBINodes(FSImageFormatPBINode.java:367)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.loadINodeSection(FSImageFormatPBINode.java:342)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader$2.call(FSImageFormatProtobuf.java:469)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
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