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https://issues.apache.org/jira/browse/FLINK-4636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kostas Kloudas closed FLINK-4636.
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Resolution: Fixed
> 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: 1.2.0, 1.1.2
> Reporter: Fabian Hueske
> Assignee: Jagadish Bihani
>
> 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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