Fabian Hueske created FLINK-4636:
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Summary: AbstractCEPPatternOperator fails to restore state
Key: FLINK-4636
URL: https://issues.apache.org/jira/browse/FLINK-4636
Project: Flink
Issue Type: Bug
Components: CEP
Affects Versions: 1.1.2, 1.2.0
Reporter: Fabian Hueske
Fix For: 1.2.0, 1.1.3
The {{restoreState()}} of the {{AbstractCEPPatternOperator}} restores the a
Java {{PriorityQueue}}. For that it first reads the number of elements to
insert and then creates a {{PriorityQueue}} object. However, Java's
{{PriorityQueue}} cannot be instantiated with an initial capacity of {{0}},
which is not checked.
In case of an empty queue, the {{PriorityQueue}} should be instantiated with an
initial size of {{1}}.
See
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Problem-with-CEPPatternOperator-when-taskmanager-is-killed-tp9024.html
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