[STORM-2303] [storm-opentsdb] Fix list invariant issue for JDK 7

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0, 1.1.0
• Fix Version/s: 2.0.0, 1.1.0
• Component/s: storm-opentsdb
• Epic Link: Release Apache Storm 1.1.0
• Assignee: Jungtaek Lim
• Reporter: Jungtaek Lim
• Created: 19/Jan/17 05:06
• Updated: 23/Jan/17 06:20
• Resolved: 23/Jan/17 06:20

Description

From STORM-2297 I also fixed an issue where storm-opentsdb refers TupleOpenTsdbDatapointMapper (implemented one) to List/Iterable, not ITupleOpenTsdbDatapointMapper (interface).
I just replaced TupleOpenTsdbDatapointMapper to ITupleOpenTsdbDatapointMapper, and it works with JDK 8, but later I realized it doesn't work with JDK 7 because generic is invariant.

While I don't know why it worked with JDK 8 (I googled about generic covariance change on JDK 8 but no luck.) it should be fixed.

Issue Links

• links to: GitHub Pull Request #1886
• links to: GitHub Pull Request #1887