[HADOOP-8619] WritableComparator must implement no-arg constructor

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-alpha1
• Fix Version/s: 0.23.0
• Component/s: io
• Hadoop Flags: Reviewed
• Assignee: Christopher Douglas
• Reporter: Radim Kolar
• Created: 24/Jul/12 20:47
• Updated: 12/May/16 18:22
• Resolved: 28/Aug/12 13:11

Description

Because of reasons listed here: http://findbugs.sourceforge.net/bugDescriptions.html#SE_COMPARATOR_SHOULD_BE_SERIALIZABLE

comparators should be serializable. To make deserialization work, it is required that all superclasses have no-arg constructor. http://findbugs.sourceforge.net/bugDescriptions.html#SE_NO_SUITABLE_CONSTRUCTOR

Simply add no=arg constructor to WritableComparator.