[HDFS-10877] Make RemoteEditLogManifest.committedTxnId optional in Protocol Buffers

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 3.0.0-alpha2
• Component/s: qjm
• Target Version/s: 3.0.0-alpha2
• Hadoop Flags: Incompatible change
• Release Note: A new protobuf field added to RemoteEditLogManifest was mistakenly marked as required. This changes the field to optional, preserving compatibility with 2.x releases but breaking compatibility with 3.0.0-alpha1.
• Assignee: Sean Mackrory
• Reporter: Sean Mackrory
• Created: 20/Sep/16 17:48
• Updated: 22/Sep/16 19:30
• Resolved: 22/Sep/16 18:43

Description

HDFS-10519 introduced a new field in the RemoteEditLogManifest message. It can be made optional to improve wire-compatibility with previous versions.

Issue Links

• relates to: HDFS-10519 Add a configuration option to enable in-progress edit log tailing