[jira] [Created] (FLINK-15581) SpillingResettableMutableObjectIterator data overflow

["Piotr Nowojski (Jira)" <ji...@apache.org>]

Piotr Nowojski created FLINK-15581:
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             Summary: SpillingResettableMutableObjectIterator data overflow
                 Key: FLINK-15581
                 URL: https://issues.apache.org/jira/browse/FLINK-15581
             Project: Flink
          Issue Type: Bug
          Components: API / DataSet
    Affects Versions: 1.9.1, 1.8.3, 1.7.2, 1.6.4, 1.10.0
            Reporter: Piotr Nowojski


As [reported by a user on the mailing list|https://lists.apache.org/thread.html/r1e3c53eaddfd8050c94ee4e521da4fc96a119662937cf801801bde52%40%3Cuser.flink.apache.org%3E]
{quote}
SpillingResettableMutableObjectIterator has a data overflow problem if the number of elements in a single input exceeds Integer.MAX_VALUE.

The reason is inside the SpillingResettableMutableObjectIterator, it track the total number of elements and the number of elements currently read with two int type fileds (elementCount and currentElementNum), and if the number of elements exceeds Integer.MAX_VALUE, it will overflow.

If there is an overflow, then in the next iteration, after reset the input , the data will not be read or only part of the data will be read.
{quote}



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