Comments (6)
gustavomahlow
commented on June 14, 2024
Another stack trace obtained via jstack:
java.lang.Thread.State: RUNNABLE
at io.reactivex.internal.queue.SpscLinkedArrayQueue.lvElement(SpscLinkedArrayQueue.java:251)
at io.reactivex.internal.queue.SpscLinkedArrayQueue.poll(SpscLinkedArrayQueue.java:138)
at io.reactivex.internal.queue.SpscLinkedArrayQueue.clear(SpscLinkedArrayQueue.java:186)
at io.reactivex.internal.operators.flowable.FlowableOnBackpressureBuffer$BackpressureBufferSubscriber.cancel(FlowableOnBackpressureBuffer.java:154)
at io.reactivex.internal.subscribers.BasicFuseableSubscriber.cancel(BasicFuseableSubscriber.java:158)
at io.reactivex.internal.subscriptions.SubscriptionHelper.cancel(SubscriptionHelper.java:181)
at io.reactivex.internal.subscribers.StrictSubscriber.cancel(StrictSubscriber.java:77)
at graphql.execution.reactive.DelegatingSubscription.cancel(DelegatingSubscription.java:26)
at graphql.kickstart.execution.subscriptions.SessionSubscriptions.cancel(SessionSubscriptions.java:37)
at graphql.kickstart.execution.subscriptions.DefaultSubscriptionSession.unsubscribe(DefaultSubscriptionSession.java:47)
at graphql.kickstart.execution.subscriptions.apollo.SubscriptionStopCommand.apply(SubscriptionStopCommand.java:15)
at graphql.kickstart.execution.subscriptions.apollo.ApolloSubscriptionConsumer.accept(ApolloSubscriptionConsumer.java:25)
at graphql.kickstart.execution.subscriptions.apollo.ApolloSubscriptionConsumer.accept(ApolloSubscriptionConsumer.java:11)
at graphql.kickstart.servlet.GraphQLWebsocketServlet$1.onMessage(GraphQLWebsocketServlet.java:146)
at graphql.kickstart.servlet.GraphQLWebsocketServlet$1.onMessage(GraphQLWebsocketServlet.java:142)
at org.apache.tomcat.websocket.WsFrameBase.sendMessageText(WsFrameBase.java:415)
at org.apache.tomcat.websocket.server.WsFrameServer.sendMessageText(WsFrameServer.java:129)
at org.apache.tomcat.websocket.WsFrameBase.processDataText(WsFrameBase.java:515)
at org.apache.tomcat.websocket.WsFrameBase.processData(WsFrameBase.java:301)
at org.apache.tomcat.websocket.WsFrameBase.processInputBuffer(WsFrameBase.java:133)
at org.apache.tomcat.websocket.server.WsFrameServer.onDataAvailable(WsFrameServer.java:85)
at org.apache.tomcat.websocket.server.WsFrameServer.doOnDataAvailable(WsFrameServer.java:183)
at org.apache.tomcat.websocket.server.WsFrameServer.notifyDataAvailable(WsFrameServer.java:162)
at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.upgradeDispatch(WsHttpUpgradeHandler.java:156)
at org.apache.coyote.http11.upgrade.UpgradeProcessorInternal.dispatch(UpgradeProcessorInternal.java:60)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:59)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1707)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
- locked <0x00000006c8a00140> (a org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper)
at java.util.concurrent.ThreadPoolExecutor.runWorker([email protected]/ThreadPoolExecutor.java:1128)
at java.util.concurrent.ThreadPoolExecutor$Worker.run([email protected]/ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run([email protected]/Thread.java:830)
It seems that poll() call is always returning a value different than null.
from rxjava.
akarnokd
commented on June 14, 2024
An infinite loop in clear usually indicates some part of the flow called an onNext concurrently at some point, which is not allowed.
Anything non-standard is your attachListener so if whatever drives the the emitter in there gets called concurrently, you'll get a corrupted queue.
from rxjava.
gustavomahlow
commented on June 14, 2024
The serialized observer can resolve this issue for me? Or I have to synchronize onNext call by myself?
The way we implemented, onNext call be called concurrently.
The attach listener call, wraps a ApplicationListener from spring (A listener that receives application events that happened)(It can be asynchronous) and make it call onNext every time a new evened is received.
from rxjava.
akarnokd
commented on June 14, 2024
-> https://reactivex.io/RxJava/2.x/javadoc/io/reactivex/ObservableEmitter.html
Observable.create(emitter -> {
ObservableEmitter<T> serializedEmitter = emitter.serialize();
someApi.addListener(data -> {
serializedEmitter.onNext(data);
});
});from rxjava.
gustavomahlow
commented on June 14, 2024
Just to confirm. A concrete example:
ConnectableObservable<T> connectableObservable =
Observable.create(emitter -> {
ObservableEmitter<T> serializedEmitter = emitter.serialize();
configurableApplicationContext.addApplicationListener(event -> serializedEmitter::onNext);
}).share().publish();
connectableObservable.connect();
return connectableObservable.toFlowable(BackpressureStrategy.BUFFER);
My observer should call serialize as well?
ConnectableObservable<T> connectableObservable =
Observable.create(emitter -> {
ObservableEmitter<T> serializedEmitter = emitter.serialize();
configurableApplicationContext.addApplicationListener(event -> serializedEmitter::onNext);
}).serialize().share().publish();
connectableObservable.connect();
return connectableObservable.toFlowable(BackpressureStrategy.BUFFER);
Thanks a lot for your help!
from rxjava.
akarnokd
commented on June 14, 2024
No need to call serialize() after create.
from rxjava.
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