[HIVE-14287] Explain output: printed nested mapvalues are dependent on map entry iteration order

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.3.0
• Assignee: Zoltan Haindrich
• Reporter: Zoltan Haindrich
• Created: 19/Jul/16 21:09
• Updated: 21/Jul/17 17:55
• Resolved: 25/Jul/16 21:20

Description

Order of map keys are handled by a TreeSet in ExplainTask#outputMap, but for Map values, there is only a toString() which implicitly iterates over the map and prints them - in case of a HashMap this iteration order may vary between jdk versions - and may cause false positive testfailures

https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/ExplainTask.java#L472

Issue Links

• is blocked by: HIVE-14285 Explain outputs: map-entry ordering of non-primitive objects.