[HDFS-12915] Fix findbugs warning in INodeFile$HeaderFormat.getBlockLayoutRedundancy

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.1.0, 3.0.1
• Component/s: namenode
• Target Version/s: 3.0.0
• Assignee: Christopher Douglas
• Reporter: Wei-Chiu Chuang
• Created: 11/Dec/17 20:49
• Updated: 02/Oct/19 17:13
• Resolved: 29/Dec/17 20:24

Description

It seems HDFS-12840 creates a new findbugs warning.

Possible null pointer dereference of replication in org.apache.hadoop.hdfs.server.namenode.INodeFile$HeaderFormat.getBlockLayoutRedundancy(BlockType, Short, Byte)
Bug type NP_NULL_ON_SOME_PATH (click for details)
In class org.apache.hadoop.hdfs.server.namenode.INodeFile$HeaderFormat
In method org.apache.hadoop.hdfs.server.namenode.INodeFile$HeaderFormat.getBlockLayoutRedundancy(BlockType, Short, Byte)
Value loaded from replication
Dereferenced at INodeFile.java:[line 210]
Known null at INodeFile.java:[line 207]

From a quick look at the patch, it seems bogus though. eddyxuSammi would you please double check?

Issue Links

• is broken by: HDFS-12840 Creating a file with non-default EC policy in a EC zone is not correctly serialized in the editlog