zentol commented on code in PR #20811:
URL: https://github.com/apache/flink/pull/20811#discussion_r968352796
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flink-test-utils-parent/flink-test-utils-junit/src/main/java/org/apache/flink/testutils/executor/FailingExecutor.java:
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@@ -0,0 +1,16 @@
+package org.apache.flink.testutils.executor;
+
+import javax.annotation.Nonnull;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.RejectedExecutionException;
+
+/** {@code FailingExecutor} will reject any {@link Runnable} that's passed
into it. */
+public enum FailingExecutor implements Executor {
Review Comment:
I'd be fine with keeping it in flink-runtime because at this time we have
barely any usages of it; and its quite special anyway.
I think we should watch out for what we add to the test-utils because that's
ultimately user-facing.
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