[HADOOP-12060] Address some issues related to ByteBuffer type input/output buffers for raw erasure coders

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: HDFS-7285
• Component/s: io
• Hadoop Flags: Reviewed
• Assignee: Kai Zheng
• Reporter: Kai Zheng
• Created: 04/Jun/15 03:36
• Updated: 30/Sep/15 19:38
• Resolved: 20/Jul/15 17:17

Description

In HDFS-8319 jingzhao raised some issues about ByteBuffer type input/output buffers for raw erasure coders:

• Should support ByteBuffers originated from ByteBuffer#slice calls;
• Should clearly spec in Javadoc that no mixing of on-heap buffers and direct buffers are allowed, and with necessary checking codes ensuring the same type of buffers are used.

In HDFS-8319 patch by jingzhao there are some good refactoring codes that would be incorporated here.
As discussed open this to address the issues separately.