[HDFS-6148] LeaseManager crashes while initiating block recovery

• Type: Bug
• Status: Resolved
• Priority: Blocker
• Resolution: Duplicate
• Affects Version/s: 2.3.0
• Target Version/s: 2.4.0
• Assignee: Kihwal Lee
• Reporter: Kihwal Lee
• Created: 24/Mar/14 17:15
• Updated: 25/Mar/14 17:58
• Resolved: 25/Mar/14 16:51

Description

While running branch-2.4, the LeaseManager crashed with an NPE. This does not always happen on block recovery.

Exception in thread
"org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor@5d66b728"
java.lang.NullPointerException
at org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction$
ReplicaUnderConstruction.isAlive(BlockInfoUnderConstruction.java:121)
at org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction.
initializeBlockRecovery(BlockInfoUnderConstruction.java:286)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.internalReleaseLease(FSNamesystem.java:3746)
at org.apache.hadoop.hdfs.server.namenode.LeaseManager.checkLeases(LeaseManager.java:474)
at org.apache.hadoop.hdfs.server.namenode.LeaseManager.access$900(LeaseManager.java:68)
at org.apache.hadoop.hdfs.server.namenode.LeaseManager$Monitor.run(LeaseManager.java:411)
at java.lang.Thread.run(Thread.java:722)

Issue Links

• is duplicated by: HDFS-6094 The same block can be counted twice towards safe mode threshold