[MAPREDUCE-3384] Add warning message for underflow or overflow

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Assignee: Brahma Reddy Battula
• Reporter: JiangKai
• Created: 09/Nov/11 09:22
• Updated: 24/Jun/15 11:28

Description

When we call the function reduce() of LongSumReducer,the result may overflow or underflow.
We should have a warning message to users if overflow/underflow occurs for all these classes,

/java/org/apache/hadoop/mapred/lib/LongSumReducer.java
 .../apache/hadoop/mapreduce/lib/reduce/IntSumReducer.java
 .../apache/hadoop/mapreduce/lib/reduce/LongSumReducer.java
 .../test/java/org/apache/hadoop/fs/AccumulatingReducer.java
 .../hadoop/mapred/nativetask/kvtest/HashSumReducer.java

Issue Links

• duplicates: MAPREDUCE-3385 Add warning message for the overflow in reduce() of org.apache.hadoop.mapreduce.lib.reduce.IntSumReducer