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Posted to dev@hbase.apache.org by "Duo Zhang (JIRA)" <ji...@apache.org> on 2016/03/30 11:25:25 UTC

[jira] [Created] (HBASE-15563) 'counter' may overflow in BoundedGroupingStrategy

Duo Zhang created HBASE-15563:
---------------------------------

             Summary: 'counter' may overflow in BoundedGroupingStrategy
                 Key: HBASE-15563
                 URL: https://issues.apache.org/jira/browse/HBASE-15563
             Project: HBase
          Issue Type: Bug
            Reporter: Duo Zhang
            Priority: Minor


{code}
groupName = groupNames[counter.getAndIncrement() % groupNames.length];
{code}

Theoretically, counter can overflow and becomes negative then causes an ArrayIndexOutOfBoundsException.

But in practice, we need 2 billions different identifiers to make this happen, and before the overflow we will run into OOM because of a huge groupNameCache...

So not sure if it is worth to fix



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