[AMBARI-21232] Determination of defaultFS with WebHDFS enabled

• Type: Improvement
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.4.0
• Fix Version/s: 3.0.0
• Component/s: ambari-views
• Flags: Patch
• Assignee: Madhuvanthi Radhakrishnan
• Reporter: Sridhar Sailappan
• Created: 12/Jun/17 21:22
• Updated: 08/Dec/17 22:18

Description

In Ambari View Utils , the determination logic for the value of defaultFS when WebHDFS is enabled, needs to consider the current property value of defaultFS. Please see attached patch for the context.

If the existing configuration for the defaultFS URI already has the protocol specified as webhdfs or swebhdfs, the URI should be used as provided and a new value should not be constructed. Constructing a new value in a such a scenario may lead to unexpected behavior if the Namenode has different host-port settings for the HTTP and WebHDFS access.

The patch also addresses the following code cleanup:
1) Fix variable names httpAddr and httpsAddr (current implementation has the naming interchanged)
2) Add null value check for httpAddr before assignment to hostWithPort
3) Fix typo in variable names - DFS_NAMENODE_HTTP_ADDRESS and DFS_NAMENODE_HTTPS_ADDRESS