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Posted to issues@flink.apache.org by "Maximilian Michels (JIRA)" <ji...@apache.org> on 2016/02/01 12:37:39 UTC

[jira] [Resolved] (FLINK-3301) Ineffective synchronization in MessageAcknowledgingSourceBase#restoreState

     [ https://issues.apache.org/jira/browse/FLINK-3301?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Maximilian Michels resolved FLINK-3301.
---------------------------------------
    Resolution: Duplicate

> Ineffective synchronization in MessageAcknowledgingSourceBase#restoreState
> --------------------------------------------------------------------------
>
>                 Key: FLINK-3301
>                 URL: https://issues.apache.org/jira/browse/FLINK-3301
>             Project: Flink
>          Issue Type: Bug
>            Reporter: Ted Yu
>
> Here is related code:
> {code}
>   public void restoreState(SerializedCheckpointData[] state) throws Exception {
>     synchronized (pendingCheckpoints) {
>       pendingCheckpoints = SerializedCheckpointData.toDeque(state, idSerializer);
> {code}
> When lock is held on current pendingCheckpoints field, new reference is assigned to the same field - making the synchronization ineffective.



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