Tassapol Athiapinya created HDFS-5982: -----------------------------------------
Summary: Restarting Namenode can have NPE. Key: HDFS-5982 URL: https://issues.apache.org/jira/browse/HDFS-5982 Project: Hadoop HDFS Issue Type: Bug Components: namenode Affects Versions: 2.3.0 Reporter: Tassapol Athiapinya Priority: Critical Fix For: 2.3.0 I stopped, started Namenode with no operations and hit into an issue when NN cannot start up again. There is NPE in NN logs. {code} 2014-02-19 01:59:04,616 FATAL org.apache.hadoop.hdfs.server.namenode.NameNode: Exception in namenode join java.lang.NullPointerException at org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotFSImageFormat.loadFileDiff(SnapshotFSImageFormat.java:131) at org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotFSImageFormat.loadFileDiffList(SnapshotFSImageFormat.java:111) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadINode(FSImageFormat.java:688) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadINodeWithLocalName(FSImageFormat.java:636) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadChildren(FSImageFormat.java:468) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadDirectoryWithSnapshot(FSImageFormat.java:510) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadDirectoryWithSnapshot(FSImageFormat.java:519) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadDirectoryWithSnapshot(FSImageFormat.java:519) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadDirectoryWithSnapshot(FSImageFormat.java:519) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadDirectoryWithSnapshot(FSImageFormat.java:519) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.loadLocalNameINodesWithSnapshot(FSImageFormat.java:412) at org.apache.hadoop.hdfs.server.namenode.FSImageFormat$Loader.load(FSImageFormat.java:350) at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:832) at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:821) at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImageFile(FSImage.java:669) at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:638) at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:265) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:856) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:616) at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:434) at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:490) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:646) at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:631) at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1270) at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1336) 2014-02-19 01:59:04,619 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1 {code} -- This message was sent by Atlassian JIRA (v6.1.5#6160)