[jira] [Updated] (FLINK-4636) AbstractCEPPatternOperator fails to restore state

["Fabian Hueske (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-4636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fabian Hueske updated FLINK-4636:
---------------------------------
    Assignee: Jagadish Bihani

> 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
>             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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