JVM/Android seems to release versions too soon

[cmelchior]

Not sure if this behavior is only related to JVM or if other platforms have similar issues, but I have seen it appear the most on JVM.

I can reproduce after a few changes every time on my demo app for Sync.

The relevant code is:

    public fun adjust(change: Int) {
        // Use an application wide dispatcher
        println("Adjust $change")
        CoroutineScope(Dispatchers.Default).launch {
            realm.write {
                println("Start change on ${this.version()}")
                println("Find ${counterObj.version()}")
                findLatest(counterObj)?.run {
                    list.add(change)
                }
            }
        }
    }

It crashes pretty quickly with the below trace, indicating that the Realm that should have been held by counterObj has been closed.

Start change on VersionId(version=16)
Exception in thread "DefaultDispatcher-worker-3 @coroutine#1078" java.lang.IllegalStateException: Realm has been closed and is no longer accessible: ./default.realm
	at io.realm.internal.RealmReference.version(RealmReference.kt:53)
	at io.realm.internal.RealmStateHolder$DefaultImpls.version(RealmState.kt:50)
	at io.realm.internal.RealmObjectInternal$DefaultImpls.version(RealmObjectInternal.kt:37)
	at io.realm.kotlin.demo.model.Counter.version(Counter.kt:8)
	at io.realm.RealmObjectKt.version(RealmObject.kt:46)
	at io.realm.kotlin.demo.CounterRepository$adjust$1$1.invoke(CounterRepository.kt:58)
	at io.realm.kotlin.demo.CounterRepository$adjust$1$1.invoke(CounterRepository.kt:56)
	at io.realm.internal.SuspendableWriter$write$2.invokeSuspend(SuspendableWriter.kt:67)
	(Coroutine boundary)
	at io.realm.internal.RealmImpl.write(RealmImpl.kt:96)
	at io.realm.kotlin.demo.CounterRepository$adjust$1.invokeSuspend(CounterRepository.kt:56)
	(Coroutine creation stacktrace)
	at kotlin.coroutines.intrinsics.IntrinsicsKt__IntrinsicsJvmKt.createCoroutineUnintercepted(IntrinsicsJvm.kt:122)
	at kotlinx.coroutines.intrinsics.CancellableKt.startCoroutineCancellable(Cancellable.kt:30)
	at kotlinx.coroutines.BuildersKt__Builders_commonKt.launch$default(Builders.common.kt:47)
	at kotlinx.coroutines.BuildersKt.launch$default(Unknown Source)
	at io.realm.kotlin.demo.CounterRepository.adjust(CounterRepository.kt:55)
	at io.realm.kotlin.demo.MainKt$main$1$2$1$1$1$1.invoke(Main.kt:36)
	at io.realm.kotlin.demo.MainKt$main$1$2$1$1$1$1.invoke(Main.kt:35)
	at androidx.compose.foundation.ClickableKt$clickable$4$gesture$1$2.invoke-k-4lQ0M(Clickable.kt:137)
	at androidx.compose.foundation.ClickableKt$clickable$4$gesture$1$2.invoke(Clickable.kt:137)
	at androidx.compose.foundation.gestures.TapGestureDetectorKt$detectTapAndPress$2$1$1.invokeSuspend(TapGestureDetector.kt:378)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTaskKt.resume(DispatchedTask.kt:179)
	at kotlinx.coroutines.CancellableContinuationImpl.resumeWith(CancellableContinuationImpl.kt:337)
	at androidx.compose.ui.input.pointer.SuspendingPointerInputFilter$PointerEventHandlerCoroutine.offerPointerEvent(SuspendingPointerInputFilter.kt:432)
	at androidx.compose.ui.input.pointer.SuspendingPointerInputFilter.dispatchPointerEvent(SuspendingPointerInputFilter.kt:330)
	at androidx.compose.ui.input.pointer.SuspendingPointerInputFilter.onPointerEvent-H0pRuoY(SuspendingPointerInputFilter.kt:343)
	at androidx.compose.ui.input.pointer.Node.dispatchMainEventPass(HitPathTracker.kt:287)
	at androidx.compose.ui.input.pointer.Node.dispatchMainEventPass(HitPathTracker.kt:275)
	at androidx.compose.ui.input.pointer.NodeParent.dispatchMainEventPass(HitPathTracker.kt:151)
	at androidx.compose.ui.input.pointer.HitPathTracker.dispatchChanges(HitPathTracker.kt:90)
	at androidx.compose.ui.input.pointer.PointerInputEventProcessor.process-gBdvCQM(PointerInputEventProcessor.kt:77)
	at androidx.compose.ui.platform.DesktopOwner.processPointerInput-8iAsVTc$ui(DesktopOwner.desktop.kt:322)
	at androidx.compose.ui.platform.DesktopOwners.onMouseReleased(DesktopOwners.desktop.kt:177)
	at androidx.compose.ui.awt.ComposeLayer$initCanvas$2$mouseReleased$1.invoke(ComposeLayer.desktop.kt:183)
	at androidx.compose.ui.awt.ComposeLayer$initCanvas$2$mouseReleased$1.invoke(ComposeLayer.desktop.kt:182)
	at androidx.compose.ui.awt.AWTDebounceEventQueue$job$1.invokeSuspend(AWTDebounceEventQueue.desktop.kt:59)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)
Caused by: java.lang.IllegalStateException: Realm has been closed and is no longer accessible: ./default.realm
	at io.realm.internal.RealmReference.version(RealmReference.kt:53)
	at io.realm.internal.RealmStateHolder$DefaultImpls.version(RealmState.kt:50)
	at io.realm.internal.RealmObjectInternal$DefaultImpls.version(RealmObjectInternal.kt:37)
	at io.realm.kotlin.demo.model.Counter.version(Counter.kt:8)
	at io.realm.RealmObjectKt.version(RealmObject.kt:46)
	at io.realm.kotlin.demo.CounterRepository$adjust$1$1.invoke(CounterRepository.kt:58)
	at io.realm.kotlin.demo.CounterRepository$adjust$1$1.invoke(CounterRepository.kt:56)
	at io.realm.internal.SuspendableWriter$write$2.invokeSuspend(SuspendableWriter.kt:67)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)

[cmelchior]

Also observed on Android emulator, but requires far more changes. Hypothesis: It is tied to the GC, and the GC kicks in sooner on JVM than on Android.