[HDFS-5950] The DFSClient and DataNode should use shared memory segments to communicate short-circuit information

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 2.4.0
• Component/s: datanode, hdfs-client
• Target Version/s: 2.4.0
• Assignee: Colin McCabe
• Reporter: Colin McCabe
• Created: 13/Feb/14 21:05
• Updated: 10/Apr/14 13:11
• Resolved: 03/Mar/14 04:14

Description

The DFSClient and DataNode should use the shared memory segments and unified cache added in the other HDFS-5182 subtasks to communicate short-circuit information.

Issue Links

• breaks: HDFS-6052 TestBlockReaderLocal fails if native code is not loaded or platform is Windows.
• breaks: HDFS-6051 HDFS cannot run on Windows since short-circuit shared memory segment changes.
• breaks: HDFS-6059 TestBlockReaderLocal fails if native library is not available
• is related to: HDFS-6040 fix DFSClient issue without libhadoop.so and some other ShortCircuitShm cleanups