NameNodes Fail to Start with java.lang.NullPointerException Error on BDA Cloudera Manager Cluster Restart When HDFS Snapshots Used

(Doc ID 2086472.1)

Last updated on DECEMBER 08, 2015

Applies to:

Big Data Appliance Integrated Software - Version 4.2.0 and later
Linux x86-64

Symptoms

When restarting a BDA Cluster in Cloudera Manager (CM) both NameNodes fail to start with the stack below.  HDFS snapshots are in use.

The stack looks like:

6:23:26.776 PM ERROR org.apache.hadoop.hdfs.server.namenode.NameNode Failed to start namenode.
java.lang.NullPointerException
at org.apache.hadoop.hdfs.server.namenode.INodeDirectory.addChild(INodeDirectory.java:531)
at org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.addToParent(FSImageFormatPBINode.java:252)
at org.apache.hadoop.hdfs.server.namenode.FSImageFormatPBINode$Loader.loadINodeDirectorySection(FSImageFormatPBINode.java:202)
at org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader.loadInternal(FSImageFormatProtobuf.java:261)
at org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader.load(FSImageFormatProtobuf.java:180)
at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$LoaderDelegator.load(FSImageFormat.java:226)
at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:924)
at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:908)
at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImageFile(FSImage.java:727)
at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:663)
at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:281)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1058)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:762)
at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:582)
at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:641)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:808)
at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:792)
at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1484)
at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.ja

 

Cause

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