YARN-10427. Duplicate Job IDs in SLS output (#3809). Contributed by Szilard Nemeth
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@ -75,6 +75,7 @@
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@Private
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@Unstable
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public abstract class AMSimulator extends TaskRunner.Task {
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private static final long FINISH_TIME_NOT_INITIALIZED = Long.MIN_VALUE;
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// resource manager
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protected ResourceManager rm;
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// main
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@ -102,7 +103,7 @@ public abstract class AMSimulator extends TaskRunner.Task {
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protected long traceStartTimeMS;
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protected long traceFinishTimeMS;
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protected long simulateStartTimeMS;
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protected long simulateFinishTimeMS;
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protected long simulateFinishTimeMS = FINISH_TIME_NOT_INITIALIZED;
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// whether tracked in Metrics
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protected boolean isTracked;
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// progress
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@ -226,6 +227,16 @@ public void middleStep() throws Exception {
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@Override
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public void lastStep() throws Exception {
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if (simulateFinishTimeMS != FINISH_TIME_NOT_INITIALIZED) {
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// The finish time is already recorded.
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// Different value from zero means lastStep was called before.
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// We want to prevent lastStep to be called more than once.
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// See YARN-10427 for more details.
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LOG.warn("Method AMSimulator#lastStep was already called. " +
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"Skipping execution of method for application: {}", appId);
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return;
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}
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LOG.info("Application {} is shutting down.", appId);
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// unregister tracking
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if (isTracked) {
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