Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Fix a Many sink / EmitterProcessor subscriber disposal leak #3029

Merged
merged 1 commit into from
Apr 21, 2022
Merged

Fix a Many sink / EmitterProcessor subscriber disposal leak #3029

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions reactor-core/src/main/java/reactor/core/publisher/EmitterProcessor.java
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2021 VMware Inc. or its affiliates, All Rights Reserved.
* Copyright (c) 2016-2022 VMware Inc. or its affiliates, All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
Expand Down Expand Up @@ -616,8 +616,8 @@ final void remove(FluxPublish.PubSubInner<T> inner) {
q.clear();
}
}
return;
}
return;
}
}

Expand Down
44 changes: 33 additions & 11 deletions reactor-core/src/test/java/reactor/core/publisher/EmitterProcessorTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2021 VMware Inc. or its affiliates, All Rights Reserved.
* Copyright (c) 2016-2022 VMware Inc. or its affiliates, All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
Expand All @@ -26,8 +26,10 @@
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.Stream;

import org.awaitility.Awaitility;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
import org.reactivestreams.Processor;
import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
Expand All @@ -38,24 +40,18 @@
import reactor.core.Scannable;
import reactor.core.scheduler.Scheduler;
import reactor.core.scheduler.Schedulers;
import reactor.test.AutoDisposingExtension;
import reactor.test.StepVerifier;
import reactor.test.subscriber.AssertSubscriber;
import reactor.util.annotation.Nullable;
import reactor.util.concurrent.Queues;
import reactor.util.context.Context;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
import static org.assertj.core.api.Assertions.fail;
import static org.assertj.core.api.Assertions.*;
import static reactor.core.Scannable.Attr;
import static reactor.core.Scannable.Attr.BUFFERED;
import static reactor.core.Scannable.Attr.CANCELLED;
import static reactor.core.Scannable.Attr.CAPACITY;
import static reactor.core.Scannable.Attr.PREFETCH;
import static reactor.core.Scannable.Attr.TERMINATED;
import static reactor.core.scheduler.Schedulers.DEFAULT_POOL_SIZE;
import static reactor.core.Scannable.Attr.*;
import static reactor.core.publisher.Sinks.EmitFailureHandler.FAIL_FAST;
import static reactor.core.scheduler.Schedulers.DEFAULT_POOL_SIZE;

/**
* @author Stephane Maldini
Expand All @@ -64,6 +60,9 @@
@SuppressWarnings("deprecation")
public class EmitterProcessorTest {

@RegisterExtension
AutoDisposingExtension afterTest = new AutoDisposingExtension();

@Test
public void currentSubscriberCount() {
Sinks.Many<Integer> sink = EmitterProcessor.create();
Expand All @@ -79,6 +78,29 @@ public void currentSubscriberCount() {
assertThat(sink.currentSubscriberCount()).isEqualTo(2);
}

// see https://github.com/reactor/reactor-core/issues/3028
@Test
void concurrentSubscriberDisposalDoesntLeak() {
for (int repetition = 0; repetition < 20; repetition++) {
Scheduler disposeScheduler = afterTest.autoDispose(Schedulers.newParallel("concurrentSubscriberDisposalDoesntLeak", 5));

List<Disposable> toDisposeInMultipleThreads = new ArrayList<>();
Sinks.Many<Integer> sink = EmitterProcessor.create();

for (int i = 0; i < 10; i++) {
toDisposeInMultipleThreads.add(
sink.asFlux().subscribe(null, null, null, Context.of("inner", "#" + i))
);
}

toDisposeInMultipleThreads.forEach(disposable -> disposeScheduler.schedule(disposable::dispose));

Awaitility.await().atMost(Duration.ofSeconds(2))
.alias("no more subscribers")
.untilAsserted(() -> assertThat(sink.currentSubscriberCount()).as("subscriberCount").isZero());
}
}

//see https://github.com/reactor/reactor-core/issues/1364
@Test
public void subscribeWithSyncFusionUpstreamFirst() {
Expand Down