Hi All, I got an NPE on hadoop-18.1 datanode
Exception in thread "org.apache.hadoop.dfs.datanod...@107f7f7" java.lang.NullPointerException at org.apache.hadoop.dfs.FSDataset.getMetaFile(FSDataset.java:571) at org.apache.hadoop.dfs.FSDataset.updateBlock(FSDataset.java:801) at org.apache.hadoop.dfs.DataNode.updateBlock(DataNode.java:3108) at org.apache.hadoop.dfs.LeaseManager.syncBlock(LeaseManager.java:503) at org.apache.hadoop.dfs.LeaseManager.recoverBlock(LeaseManager.java:471) at org.apache.hadoop.dfs.LeaseManager.recoverBlocks(LeaseManager.java:412) at org.apache.hadoop.dfs.DataNode$1.run(DataNode.java:3098) at java.lang.Thread.run(Thread.java:619) Pl advise how do I debug this problem -Sagar