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https://issues.apache.org/jira/browse/FLINK-33116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17771813#comment-17771813
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Matthias Pohl commented on FLINK-33116:
---------------------------------------
Looks like the {{CliClient}} is not thread-safe: The close call fails with a
{{NullPointerException}} because {{CliClient.close()}} calls
{{closeTerminal()}} if a terminal set. But the test finishes the
{{client.executeInInteractiveMode()}} in a separate thread which calls
{{closeTerminal()}} in the end as well. [~fsk119] can you delegate this issue?
> CliClientTest.testCancelExecutionInteractiveMode fails with NPE on AZP
> ----------------------------------------------------------------------
>
> Key: FLINK-33116
> URL: https://issues.apache.org/jira/browse/FLINK-33116
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Client
> Affects Versions: 1.19.0
> Reporter: Sergey Nuyanzin
> Priority: Critical
> Labels: stale-critical, test-stability
>
> This build
> [https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=53309&view=logs&j=ce3801ad-3bd5-5f06-d165-34d37e757d90&t=5e4d9387-1dcc-5885-a901-90469b7e6d2f&l=12264]
> fails as
> {noformat}
> Sep 18 02:26:15 02:26:15.743 [ERROR]
> org.apache.flink.table.client.cli.CliClientTest.testCancelExecutionInteractiveMode
> Time elapsed: 0.1 s <<< ERROR!
> Sep 18 02:26:15 java.lang.NullPointerException
> Sep 18 02:26:15 at
> org.apache.flink.table.client.cli.CliClient.closeTerminal(CliClient.java:284)
> Sep 18 02:26:15 at
> org.apache.flink.table.client.cli.CliClient.close(CliClient.java:108)
> Sep 18 02:26:15 at
> org.apache.flink.table.client.cli.CliClientTest.testCancelExecutionInteractiveMode(CliClientTest.java:314)
> Sep 18 02:26:15 at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method) {noformat}
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