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https://issues.apache.org/jira/browse/APEXCORE-263?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Weise updated APEXCORE-263:
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Summary: Checkpoint can be performed twice for same window (was:
Checkpoint Can Be Performed Twice For The Same Window)
> Checkpoint can be performed twice for same window
> -------------------------------------------------
>
> Key: APEXCORE-263
> URL: https://issues.apache.org/jira/browse/APEXCORE-263
> Project: Apache Apex Core
> Issue Type: Bug
> Reporter: Timothy Farkas
> Assignee: Timothy Farkas
> Fix For: 3.3.0
>
>
> This can happen if any application is configured in the following way
> <property>
> <name>dt.application.DoubleCheckpoint.attr.CHECKPOINT_WINDOW_COUNT</name>
> <value>1</value>
> </property>
> <property>
> <name>dt.operator.*.attr.CHECKPOINT_WINDOW_COUNT</name>
> <value>2</value>
> </property>
> When configured like this what will happen is that in the first window the
> checkpoint control tuple is sent to an operator so the doCheckpoint flag will
> be set. Then at the end of the second window the checkpoint is performed.
> Then the checkpoint control tuple is received immediately after the end
> window triggering the checkpoint to be performed again
> A simple test app which illustrates this problem is here:
> https://github.com/ilooner/doubleCheckpoint
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