Single threaded unit tests - test hangs and thread is in waiting state

Bug Report

Current Behavior

Probably a newbie error but I did not find a comparable issue here or on stackoverflow.com.

I'm the author of JobRunr and I try to support Redis with Lettuce as a client to store Job information.

I used connection pooling with commons-pool2 and all was working well. A user asked me why the dependency to commons-pool2 is needed as, according to the docs, Lettuce should be thread-safe.

Note: I'm using the synchronous api (long live project loom :smile: )

I converted my class so that it reuses the same connection (and does not close it off-course). Yet, now after 3/4 tests, they hang and only after some timeout the test continues.

I made sure that:

I open only one connection from my code (I tested this with a breakpoint in AbstractRedisClient.initializeChannelAsync0(ConnectionBuilder connectionBuilder, CompletableFuture<Channel> channelReadyFuture, SocketAddress redisAddress))
I do not close the connection from my code (expect after all tests finished) (also tested with a breakpoint)

Thread dump

```java Full thread dump "Test worker@1" prio=5 tid=0x1 nid=NA waiting java.lang.Thread.State: WAITING at jdk.internal.misc.Unsafe.park(Unsafe.java:-1) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234) at java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1798) at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3128) at java.util.concurrent.CompletableFuture.timedGet(CompletableFuture.java:1868) at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2021) at io.lettuce.core.protocol.AsyncCommand.await(AsyncCommand.java:83) at io.lettuce.core.internal.Futures.awaitOrCancel(Futures.java:244) at io.lettuce.core.FutureSyncInvocationHandler.handleInvocation(FutureSyncInvocationHandler.java:75) at io.lettuce.core.internal.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:80) at com.sun.proxy.$Proxy36.zrange(Unknown Source:-1) at org.jobrunr.storage.nosql.redis.LettuceRedisStorageProvider.getBackgroundJobServers(LettuceRedisStorageProvider.java:156) at org.jobrunr.storage.StorageProviderTest.testRemoveTimedOutBackgroundJobServers(StorageProviderTest.java:139) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:566) at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:688) at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131) at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140) at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor$$Lambda$197.1803306804.apply(Unknown Source:-1) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115) at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall$$Lambda$198.148377842.apply(Unknown Source:-1) at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105) at org.junit.jupiter.engine.execution.ExecutableInvoker$$Lambda$491.1716423607.apply(Unknown Source:-1) at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45) at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:210) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor$$Lambda$723.540692943.execute(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:206) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:131) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:65) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$260.1714507758.execute(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$259.1106755629.invoke(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$258.179437727.execute(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService$$Lambda$286.1366832221.accept(Unknown Source:-1) at java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$260.1714507758.execute(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$259.1106755629.invoke(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$258.179437727.execute(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService$$Lambda$286.1366832221.accept(Unknown Source:-1) at java.util.ArrayList.forEach(ArrayList.java:1541) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$260.1714507758.execute(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$259.1106755629.invoke(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127) at org.junit.platform.engine.support.hierarchical.NodeTestTask$$Lambda$258.179437727.execute(Unknown Source:-1) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54) at org.junit.platform.launcher.core.EngineExecutionOrchestrator$$Lambda$234.1859555837.accept(Unknown Source:-1) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67) at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:99) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79) at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75) at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1) at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:566) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33) at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94) at com.sun.proxy.$Proxy5.stop(Unknown Source:-1) at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193) at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129) at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100) at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60) at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56) at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133) at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71) at worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69) at worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74) "/127.0.0.1:47610 to /127.0.0.1:37433 workers Thread 3@1959" prio=5 tid=0x1b nid=NA runnable java.lang.Thread.State: RUNNABLE at sun.nio.ch.EPoll.wait(EPoll.java:-1) at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:124) - locked <0x1b3a> (a sun.nio.ch.EPollSelectorImpl) - locked <0x1b3b> (a sun.nio.ch.Util$2) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:141) at org.gradle.internal.remote.internal.inet.SocketConnection$SocketInputStream.read(SocketConnection.java:185) at com.esotericsoftware.kryo.io.Input.fill(Input.java:146) at com.esotericsoftware.kryo.io.Input.require(Input.java:178) at com.esotericsoftware.kryo.io.Input.readByte(Input.java:295) at org.gradle.internal.serialize.kryo.KryoBackedDecoder.readByte(KryoBackedDecoder.java:82) at org.gradle.internal.remote.internal.hub.InterHubMessageSerializer$MessageReader.read(InterHubMessageSerializer.java:64) at org.gradle.internal.remote.internal.hub.InterHubMessageSerializer$MessageReader.read(InterHubMessageSerializer.java:52) at org.gradle.internal.remote.internal.inet.SocketConnection.receive(SocketConnection.java:81) at org.gradle.internal.remote.internal.hub.MessageHub$ConnectionReceive.run(MessageHub.java:270) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:61) at java.lang.Thread.run(Thread.java:829) "docker-java-stream-115232061@4470" daemon prio=5 tid=0x1e nid=NA runnable java.lang.Thread.State: RUNNABLE at com.github.dockerjava.transport.DomainSocket.read(DomainSocket.java:-1) at com.github.dockerjava.transport.DomainSocket.read(DomainSocket.java:79) at com.github.dockerjava.transport.DomainSocket.access$200(DomainSocket.java:35) at com.github.dockerjava.transport.DomainSocket$DomainSocketInputStream.read(DomainSocket.java:162) at com.github.dockerjava.zerodep.shaded.org.apache.hc.client5.http.impl.io.LoggingInputStream.read(LoggingInputStream.java:81) at com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:149) at com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.impl.io.SessionInputBufferImpl.readLine(SessionInputBufferImpl.java:280) at com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.impl.io.ChunkedInputStream.getChunkSize(ChunkedInputStream.java:261) at com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.impl.io.ChunkedInputStream.nextChunk(ChunkedInputStream.java:222) at com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:147) at com.github.dockerjava.zerodep.shaded.org.apache.hc.core5.http.io.EofSensorInputStream.read(EofSensorInputStream.java:118) at org.testcontainers.shaded.com.github.dockerjava.core.FramedInputStreamConsumer.accept(FramedInputStreamConsumer.java:30) at org.testcontainers.shaded.com.github.dockerjava.core.FramedInputStreamConsumer.accept(FramedInputStreamConsumer.java:12) at org.testcontainers.shaded.com.github.dockerjava.core.DefaultInvocationBuilder.lambda$executeAndStream$1(DefaultInvocationBuilder.java:275) at org.testcontainers.shaded.com.github.dockerjava.core.DefaultInvocationBuilder$$Lambda$412.1120864417.run(Unknown Source:-1) at java.lang.Thread.run(Thread.java:829) "lettuce-nioEventLoop-4-1@5734" daemon prio=5 tid=0x23 nid=NA runnable java.lang.Thread.State: RUNNABLE at sun.nio.ch.EPoll.wait(EPoll.java:-1) at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120) at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:124) - locked <0x1b3d> (a sun.nio.ch.EPollSelectorImpl) - locked <0x1b3e> (a io.netty.channel.nio.SelectedSelectionKeySet) at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:141) at io.netty.channel.nio.SelectedSelectionKeySetSelector.select(SelectedSelectionKeySetSelector.java:68) at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:810) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:457) at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:829) "/127.0.0.1:47610 to /127.0.0.1:37433 workers@1901" prio=5 tid=0x19 nid=NA waiting java.lang.Thread.State: WAITING at jdk.internal.misc.Unsafe.park(Unsafe.java:-1) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081) at org.gradle.internal.remote.internal.hub.queue.EndPointQueue.take(EndPointQueue.java:49) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:403) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:61) at java.lang.Thread.run(Thread.java:829) "/127.0.0.1:47610 to /127.0.0.1:37433 workers Thread 2@1957" prio=5 tid=0x1a nid=NA waiting java.lang.Thread.State: WAITING at jdk.internal.misc.Unsafe.park(Unsafe.java:-1) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194) at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081) at org.gradle.internal.remote.internal.hub.queue.EndPointQueue.take(EndPointQueue.java:49) at org.gradle.internal.remote.internal.hub.MessageHub$ConnectionDispatch.run(MessageHub.java:322) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:61) at java.lang.Thread.run(Thread.java:829) "ducttape-0@3732" daemon prio=5 tid=0x1c nid=NA waiting java.lang.Thread.State: WAITING at jdk.internal.misc.Unsafe.park(Unsafe.java:-1) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234) at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462) at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361) at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1053) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1114) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.lang.Thread.run(Thread.java:829) "process reaper@3976" daemon prio=10 tid=0x1d nid=NA waiting java.lang.Thread.State: WAITING at jdk.internal.misc.Unsafe.park(Unsafe.java:-1) at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234) at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:462) at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:361) at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:937) at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1053) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1114) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.lang.Thread.run(Thread.java:829) "testcontainers-ryuk@4592" daemon prio=5 tid=0x1f nid=NA waiting java.lang.Thread.State: WAITING at java.lang.Object.wait(Object.java:-1) at org.testcontainers.utility.ResourceReaper.lambda$null$1(ResourceReaper.java:196) at org.testcontainers.utility.ResourceReaper$$Lambda$432.1120560222.run(Unknown Source:-1) at org.rnorth.ducttape.ratelimits.RateLimiter.doWhenReady(RateLimiter.java:27) at org.testcontainers.utility.ResourceReaper.lambda$start$2(ResourceReaper.java:185) at org.testcontainers.utility.ResourceReaper$$Lambda$431.1380026145.run(Unknown Source:-1) at java.lang.Thread.run(Thread.java:829) "Common-Cleaner@6967" daemon prio=8 tid=0x13 nid=NA waiting java.lang.Thread.State: WAITING at java.lang.Object.wait(Object.java:-1) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155) at jdk.internal.ref.CleanerImpl.run(CleanerImpl.java:148) at java.lang.Thread.run(Thread.java:829) at jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:134) "lettuce-timer-3-1@5210" daemon prio=5 tid=0x22 nid=NA sleeping java.lang.Thread.State: TIMED_WAITING at java.lang.Thread.sleep(Thread.java:-1) at io.netty.util.HashedWheelTimer$Worker.waitForNextTick(HashedWheelTimer.java:566) at io.netty.util.HashedWheelTimer$Worker.run(HashedWheelTimer.java:462) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:829) "Reference Handler@6964" daemon prio=10 tid=0x2 nid=NA runnable java.lang.Thread.State: RUNNABLE at java.lang.ref.Reference.waitForReferencePendingList(Reference.java:-1) at java.lang.ref.Reference.processPendingReferences(Reference.java:241) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:213) "Finalizer@6965" daemon prio=8 tid=0x3 nid=NA waiting java.lang.Thread.State: WAITING at java.lang.Object.wait(Object.java:-1) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:176) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:170) "Signal Dispatcher@6966" daemon prio=9 tid=0x4 nid=NA runnable java.lang.Thread.State: RUNNABLE ```

Input Code

Github project: https://github.com/jobrunr/jobrunr/ Branch: lettuce-hangs Test: core/src/test/java/org/jobrunr/storage/nosql/redis/LettuceRedisStorageProviderTest.java Prerequisites to run test:

docker (via TestContainers)

Expected behavior/code

Thread not to be in waiting state.

Environment

Lettuce version(s): 6.1.4.RELEASE
Redis version: 6.2.5

Possible Solution

No idea... I can't even understand how you would get Lettuce thread-safe

redis / lettuce