[HADOOP-3329] DatanodeDescriptor objects stored in FSImage may be out dated.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.18.0
• Hadoop Flags: Incompatible change, Reviewed
• Release Note: Changed format of file system image to not store locations of last block.
• Assignee: Dhruba Borthakur
• Reporter: Tsz-wo Sze
• Created: 30/Apr/08 19:39
• Updated: 08/Jul/09 16:43
• Resolved: 09/May/08 21:40

Description

INodeFileUnderConstruction.targets is a DatanodeDescriptor array which stores the locations for last block. These DatanodeDescriptors are serialized and stored in the FSImage. However, a DatanodeDescriptor contains information like IP address and ports. These information may be out dated after a datanode restart.

We should probably only stored the storageID of a DatanodeDescriptor in FSImage and then lookup the DatanodeDescriptor object from the datanodeMap.

Issue Links

• is related to: HADOOP-3337 Name-node fails to start because DatanodeInfo format changed.
• is related to: HADOOP-1700 Append to files in HDFS