[SPARK-7529] Java compatibility check for MLlib 1.4

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0
• Fix Version/s: 1.4.0
• Component/s: ML, MLlib
• Target Version/s: 1.4.0
• Assignee: Joseph K. Bradley
• Reporter: Xiangrui Meng
• Created: 11/May/15 16:18
• Updated: 06/May/16 08:32
• Resolved: 02/Jun/15 22:37

Description

Check Java compatibility for MLlib 1.4. We should create separate JIRAs for each possible issue.

Checking compatibility means:

• comparing with the Scala doc
• verifying that Java docs are not messed up by Scala type incompatibilities. Some items to look out for are:
  • Check for generic "Object" types where Java cannot understand complex Scala types.
  • Check Scala objects (especially with nesting!) carefully.
  • Check for uses of Scala and Java enumerations, which can show up oddly in the other language's doc.
• If needed for complex issues, create small Java unit tests which execute each method. (The correctness can be checked in Scala.)

Issue Links

• contains: SPARK-7528 Java compatibility of RankingMetrics
• is related to: SPARK-8054 Java compatibility fixes for MLlib 1.4
• relates to: SPARK-14814 ML 2.0 QA: API: Java compatibility, docs