[HDFS-3721] hsync support broke wire compatibility

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.0-alpha
• Fix Version/s: 2.0.2-alpha
• Component/s: datanode, hdfs-client
• Hadoop Flags: Reviewed
• Assignee: Aaron Myers
• Reporter: Todd Lipcon
• Created: 24/Jul/12 20:58
• Updated: 11/Oct/12 17:46
• Resolved: 09/Aug/12 21:34

Description

HDFS-744 added support for hsync to the data transfer wire protocol. However, it actually broke wire compatibility: if the client has hsync support but the server does not, the client cannot read or write data on the old cluster.

Issue Links

• is broken by: HDFS-744 Support hsync in HDFS