Shardul Singh created HBASE-22980:
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Summary: HRegionPartioner getPartition() method incorrectly
partitions the regions of the table.
Key: HBASE-22980
URL: https://issues.apache.org/jira/browse/HBASE-22980
Project: HBase
Issue Type: Bug
Environment: Instead of
{code:java}
if(i >= numPartitions-1)
{code}
It should be
{code:java}
if(i >= numPartitions)
{code}
Reporter: Shardul Singh
Assignee: Shardul Singh
In HRegionPartitioner getPartition(), the case where we have less reduces than
region is incorrect.
https://github.com/apache/hbase/blob/fbd5b5e32753104f88600b0f4c803ab5659bce64/hbase-mapreduce/src/main/java/org/apache/hadoop/hbase/mapreduce/HRegionPartitioner.java#L92
Consider the following scenario:
1. if there are 5 regions for the table, partitions = 5 and number of reducers
is also 5.
So in this case above code should not return true. But for the last region when
i=4, getPartition should return 4 but it returns 2 because it falls in the case
of when we have less reduces than region and returns true for the above
condition.
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