[HDFS-3694] QJM: Fix getEditLogManifest to fetch httpPort if necessary

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: QuorumJournalManager (HDFS-3077)
• Target Version/s: QuorumJournalManager (HDFS-3077)
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 20/Jul/12 01:00
• Updated: 25/Jul/12 21:40
• Resolved: 25/Jul/12 21:40

Description

This is necessary for QJM to work with HA. When the NNs start up, they start in standby state and try to read from the JournalNodes. So they call getEditLogManifest(). But they don't call getJournalInfo so the httpPort field doesn't get filled in. This means that when they try to actually fetch the remote edits, they fail since they don't know the JN's HTTP port.