[jira] [Created] (FLINK-15549) integer overflow in SpillingResettableMutableObjectIterator

[Shang Yuanchun (Jira)]

caojian0613 created FLINK-15549:
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             Summary: integer overflow in SpillingResettableMutableObjectIterator
                 Key: FLINK-15549
                 URL: https://issues.apache.org/jira/browse/FLINK-15549
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Task
    Affects Versions: 1.9.1, 1.9.0
            Reporter: caojian0613


The 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.

Therefore, we should changing the type of these two fields of SpillingResettableMutableObjectIterator from int to long, and we also need a pre-check mechanism before such numerical.



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