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https://issues.apache.org/jira/browse/GEODE-4072?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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nabarun closed GEODE-4072.
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> Race condition in AckReaderThread.shutdown
> -------------------------------------------
>
> Key: GEODE-4072
> URL: https://issues.apache.org/jira/browse/GEODE-4072
> Project: Geode
> Issue Type: Bug
> Components: wan
> Reporter: nabarun
> Assignee: nabarun
> Fix For: 1.4.0
>
>
> *+Issue+*
> {code:title=AckReaderThread.java}
> if (connection != null) {
> Connection conn = connection;
> shutDownAckReaderConnection();
> if (!conn.isDestroyed()) {
> conn.destroy();
> sender.getProxy().returnConnection(conn);
> }
> }
> {code}
> The global connection variable may be set to null before it is assigned to
> the local variable, resulting in NPE.
> *Solution*:
> --set the local variable to the connection variable and use that local
> variable for null checks.
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