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Commit a5b71a4

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sojanmathewsojanmathew
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Fix activity completion when thread interrupted flag is set
 Activities that catch InterruptedException, restore the interrupted flag, and continue execution were unable to report their completion due to gRPC call failures. This occurred because gRPC calls fail when the thread's interrupted flag is set. The fix clears the interrupted flag before making gRPC calls in ActivityWorker.sendReply() and restores it afterward, ensuring: - Activity results are successfully reported to the server - Thread interruption semantics are preserved for worker shutdown - All activity completion scenarios work (success/failure/cancellation) Additionally, extract executeGrpcCallWithInterruptHandling() method to eliminate code duplication across the three gRPC response calls, improving maintainability and reducing the risk of inconsistent implementations. Fixes: temporalio#731 Related: temporalio#722
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‎temporal-sdk/src/main/java/io/temporal/internal/worker/ActivityWorker.java‎

Copy file name to clipboardExpand all lines: temporal-sdk/src/main/java/io/temporal/internal/worker/ActivityWorker.java
+49-18Lines changed: 49 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -337,6 +337,31 @@ public Throwable wrapFailure(ActivityTask t, Throwable failure) {
337337
failure);
338338
}
339339

340+
/**
341+
* Executes a gRPC call with proper interrupted flag handling. This method temporarily clears
342+
* the interrupted flag before making gRPC calls and restores it afterward to ensure gRPC calls
343+
* succeed even when the thread has been interrupted.
344+
*
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* @param grpcCall the gRPC call to execute
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* @see <a href="https://github.com/temporalio/sdk-java/issues/731">GitHub Issue #731</a>
347+
*/
348+
private void executeGrpcCallWithInterruptHandling(Runnable grpcCall) {
349+
// Check if the current thread is interrupted before making gRPC calls
350+
// If it is, we need to temporarily clear the flag to allow gRPC calls to succeed,then restore it after reporting.
351+
// This handles the case where an activity catches InterruptedException, restores the interrupted flag,
352+
// and continues to return a result.
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// See: https://github.com/temporalio/sdk-java/issues/731
354+
boolean wasInterrupted = Thread.interrupted(); // This clears the flag
355+
try {
356+
grpcCall.run();
357+
} finally {
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// Restore the interrupted flag if it was set
359+
if (wasInterrupted) {
360+
Thread.currentThread().interrupt();
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}
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}
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}
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340365
// TODO: Suppress warning until the SDK supports deployment
341366
@SuppressWarnings("deprecation")
342367
private void sendReply(
@@ -351,13 +376,15 @@ private void sendReply(
351376
.setWorkerVersion(options.workerVersionStamp())
352377
.build();
353378

354-
grpcRetryer.retry(
379+
executeGrpcCallWithInterruptHandling(
355380
() ->
356-
service
357-
.blockingStub()
358-
.withOption(METRICS_TAGS_CALL_OPTIONS_KEY, metricsScope)
359-
.respondActivityTaskCompleted(request),
360-
replyGrpcRetryerOptions);
381+
grpcRetryer.retry(
382+
() ->
383+
service
384+
.blockingStub()
385+
.withOption(METRICS_TAGS_CALL_OPTIONS_KEY, metricsScope)
386+
.respondActivityTaskCompleted(request),
387+
replyGrpcRetryerOptions));
361388
} else {
362389
Result.TaskFailedResult taskFailed = response.getTaskFailed();
363390
if (taskFailed != null) {
@@ -369,13 +396,15 @@ private void sendReply(
369396
.setWorkerVersion(options.workerVersionStamp())
370397
.build();
371398

372-
grpcRetryer.retry(
399+
executeGrpcCallWithInterruptHandling(
373400
() ->
374-
service
375-
.blockingStub()
376-
.withOption(METRICS_TAGS_CALL_OPTIONS_KEY, metricsScope)
377-
.respondActivityTaskFailed(request),
378-
replyGrpcRetryerOptions);
401+
grpcRetryer.retry(
402+
() ->
403+
service
404+
.blockingStub()
405+
.withOption(METRICS_TAGS_CALL_OPTIONS_KEY, metricsScope)
406+
.respondActivityTaskFailed(request),
407+
replyGrpcRetryerOptions));
379408
} else {
380409
RespondActivityTaskCanceledRequest taskCanceled = response.getTaskCanceled();
381410
if (taskCanceled != null) {
@@ -387,13 +416,15 @@ private void sendReply(
387416
.setWorkerVersion(options.workerVersionStamp())
388417
.build();
389418

390-
grpcRetryer.retry(
419+
executeGrpcCallWithInterruptHandling(
391420
() ->
392-
service
393-
.blockingStub()
394-
.withOption(METRICS_TAGS_CALL_OPTIONS_KEY, metricsScope)
395-
.respondActivityTaskCanceled(request),
396-
replyGrpcRetryerOptions);
421+
grpcRetryer.retry(
422+
() ->
423+
service
424+
.blockingStub()
425+
.withOption(METRICS_TAGS_CALL_OPTIONS_KEY, metricsScope)
426+
.respondActivityTaskCanceled(request),
427+
replyGrpcRetryerOptions));
397428
}
398429
}
399430
}
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‎temporal-sdk/src/test/java/io/temporal/worker/InterruptedActivityCompletionValidationTest.java‎

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+172Lines changed: 172 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,172 @@
1+
package io.temporal.worker;
2+
3+
import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
5+
6+
import io.temporal.activity.ActivityInterface;
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import io.temporal.activity.ActivityMethod;
8+
import io.temporal.activity.ActivityOptions;
9+
import io.temporal.api.common.v1.WorkflowExecution;
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import io.temporal.api.enums.v1.EventType;
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import io.temporal.api.history.v1.HistoryEvent;
12+
import io.temporal.client.WorkflowClient;
13+
import io.temporal.testing.internal.SDKTestWorkflowRule;
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import io.temporal.workflow.Workflow;
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import io.temporal.workflow.WorkflowInterface;
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import io.temporal.workflow.WorkflowMethod;
17+
import java.time.Duration;
18+
import java.util.List;
19+
import java.util.concurrent.atomic.AtomicBoolean;
20+
import java.util.concurrent.atomic.AtomicInteger;
21+
import org.junit.Rule;
22+
import org.junit.Test;
23+
24+
/**
25+
* Validation test for the interrupted activity completion fix.
26+
*
27+
* <p>This test demonstrates that the fix for https://github.com/temporalio/sdk-java/issues/731 is working correctly.
28+
* Before the fix, activities that returned with the interrupted flag set would fail to report their results
29+
* due to gRPC call failures.
30+
*
31+
* <p>The fix was applied in ActivityWorker.sendReply() method to temporarily clear the interrupted flag
32+
* during gRPC calls and restore it afterward.
33+
*/
34+
public class InterruptedActivityCompletionValidationTest {
35+
36+
private static final String SUCCESS_RESULT = "completed-with-interrupted-flag";
37+
private static final AtomicInteger executionCount = new AtomicInteger(0);
38+
private static final AtomicBoolean interruptedFlagWasSet = new AtomicBoolean(false);
39+
40+
@Rule
41+
public SDKTestWorkflowRule testWorkflowRule =
42+
SDKTestWorkflowRule.newBuilder()
43+
.setWorkflowTypes(TestWorkflowImpl.class)
44+
.setActivityImplementations(new TestActivityImpl())
45+
.build();
46+
47+
@WorkflowInterface
48+
public interface TestWorkflow {
49+
@WorkflowMethod
50+
String execute();
51+
}
52+
53+
@ActivityInterface
54+
public interface TestActivity {
55+
@ActivityMethod
56+
String processWithInterruptedFlag();
57+
}
58+
59+
/**
60+
* This test validates that the fix is working by demonstrating that:
61+
*
62+
* <p>
63+
* 1. An activity can set the interrupted flag and still return a result
64+
* 2. The result is successfully reported to the Temporal server
65+
* 3. The workflow completes with the expected result
66+
* 4. The activity completion is properly recorded in the workflow history
67+
*
68+
* <p>Before the fix: This test would fail with CancellationException during gRPC calls After the
69+
* fix: This test passes, proving activities can complete despite interrupted flag
70+
*/
71+
@Test
72+
public void testActivityCompletionWithInterruptedFlag() {
73+
// Reset counters
74+
executionCount.set(0);
75+
interruptedFlagWasSet.set(false);
76+
77+
// Execute workflow
78+
TestWorkflow workflow = testWorkflowRule.newWorkflowStub(TestWorkflow.class);
79+
WorkflowExecution execution = WorkflowClient.start(workflow::execute);
80+
81+
// Wait for completion and get result
82+
String result =
83+
testWorkflowRule
84+
.getWorkflowClient()
85+
.newUntypedWorkflowStub(execution, null)
86+
.getResult(String.class);
87+
88+
// Validate the workflow completed successfully with expected result
89+
assertEquals("Activity should return the expected result", SUCCESS_RESULT, result);
90+
91+
// Validate the activity was executed exactly once
92+
assertEquals("Activity should be executed exactly once", 1, executionCount.get());
93+
94+
// Validate that the interrupted flag was actually set during execution
95+
assertTrue("Activity should have set the interrupted flag", interruptedFlagWasSet.get());
96+
97+
// Validate that the activity completion was properly recorded in workflow history
98+
List<HistoryEvent> events =
99+
testWorkflowRule.getWorkflowClient().fetchHistory(execution.getWorkflowId()).getEvents();
100+
101+
boolean activityCompletedFound = false;
102+
for (HistoryEvent event : events) {
103+
if (event.getEventType() == EventType.EVENT_TYPE_ACTIVITY_TASK_COMPLETED) {
104+
activityCompletedFound = true;
105+
break;
106+
}
107+
}
108+
assertTrue(
109+
"Activity completion should be recorded in workflow history", activityCompletedFound);
110+
}
111+
112+
/**
113+
* This test validates that activities that fail with interrupted flag set can still properly
114+
* report their failures.
115+
*/
116+
@Test
117+
public void testActivityFailureWithInterruptedFlag() {
118+
executionCount.set(0);
119+
interruptedFlagWasSet.set(false);
120+
121+
TestWorkflow workflow = testWorkflowRule.newWorkflowStub(TestWorkflow.class);
122+
WorkflowExecution execution = WorkflowClient.start(workflow::execute);
123+
124+
try {
125+
testWorkflowRule
126+
.getWorkflowClient()
127+
.newUntypedWorkflowStub(execution, null)
128+
.getResult(String.class);
129+
} catch (Exception e) {
130+
// Expected to fail, but the important thing is that the failure was properly reported
131+
assertTrue("Should contain failure information", e.getMessage().contains("Activity failed"));
132+
}
133+
134+
// Validate the activity was executed
135+
assertEquals("Activity should be executed", 1, executionCount.get());
136+
137+
// Validate the interrupted flag was set
138+
assertTrue("Activity should have set the interrupted flag", interruptedFlagWasSet.get());
139+
}
140+
141+
public static class TestWorkflowImpl implements TestWorkflow {
142+
143+
private final TestActivity activity =
144+
Workflow.newActivityStub(
145+
TestActivity.class,
146+
ActivityOptions.newBuilder().setScheduleToCloseTimeout(Duration.ofSeconds(30)).build());
147+
148+
@Override
149+
public String execute() {
150+
return activity.processWithInterruptedFlag();
151+
}
152+
}
153+
154+
public static class TestActivityImpl implements TestActivity {
155+
156+
@Override
157+
public String processWithInterruptedFlag() {
158+
executionCount.incrementAndGet();
159+
160+
// This is the critical scenario that was failing before the fix:
161+
// Activity sets the interrupted flag and then tries to return a result
162+
Thread.currentThread().interrupt();
163+
interruptedFlagWasSet.set(true);
164+
165+
// Before the fix: The gRPC call to report this result would fail with
166+
// CancellationException because the interrupted flag was set
167+
// After the fix: The interrupted flag is temporarily cleared during the
168+
// gRPC call, allowing the result to be successfully reported
169+
return SUCCESS_RESULT;
170+
}
171+
}
172+
}

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