rkhachatryan commented on code in PR #21923:
URL: https://github.com/apache/flink/pull/21923#discussion_r1112263554
##########
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/tasks/StreamTask.java:
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@@ -256,19 +259,17 @@
private final StreamTaskAsyncExceptionHandler asyncExceptionHandler;
/**
- * Flag to mark the task "in operation", in which case check needs to be
initialized to true, so
- * that early cancel() before invoke() behaves correctly.
- */
- private volatile boolean isRunning;
-
- /** Flag to mark this task as canceled. */
- private volatile boolean canceled;
-
- /**
- * Flag to mark this task as failing, i.e. if an exception has occurred
inside {@link
- * #invoke()}.
+ * INITIALIZED: task constructor was called or on init state. RUNNING:
task is in operation.
+ * FAILING: task is failing e.g., if an exception has occurred inside
{@link #invoke()}.
+ * CANCELED: when this task is canceled. FINISHED: task successfully
terminated.
*/
- private volatile boolean failing;
+ private enum TaskState {
+ INITIALIZED,
+ RUNNING,
+ FAILING,
Review Comment:
IIRC, it is `failing` and not `failed` to emphasize that the task thread
might still be running and hasn't complete the cleanup yet.
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