我在Hazelcast Jet中遇到了奇怪的行为。我一次要开始许多工作（〜30，有些在其他工作之前被触发）。但是，当我的Hazelcast Jet作业计数达到26（魔术数字？）时，所有处理都被卡住了。
在threadumps中，我看到以下信息：
"hz._hzInstance_1_jet.cached.thread-1" #37 prio=5 os_prio=0 cpu=1093.29ms elapsed=393.62s tid=0x00007f95dc007000 nid=0x6bfc in Object.wait() [0x00007f95e6af4000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(java.base@11.0.2/Native Method)
- waiting on <no object reference available>
at com.hazelcast.spi.impl.AbstractCompletableFuture.get(AbstractCompletableFuture.java:229)
- waiting to re-lock in wait() <0x00000007864b7040> (a com.hazelcast.internal.util.SimpleCompletableFuture)
at com.hazelcast.spi.impl.AbstractCompletableFuture.get(AbstractCompletableFuture.java:191)
at com.hazelcast.spi.impl.operationservice.impl.InvokeOnPartitions.invoke(InvokeOnPartitions.java:88)
at com.hazelcast.spi.impl.operationservice.impl.OperationServiceImpl.invokeOnAllPartitions(OperationServiceImpl.java:385)
at com.hazelcast.map.impl.proxy.MapProxySupport.clearInternal(MapProxySupport.java:1016)
at com.hazelcast.map.impl.proxy.MapProxyImpl.clearInternal(MapProxyImpl.java:109)
at com.hazelcast.map.impl.proxy.MapProxyImpl.clear(MapProxyImpl.java:698)
at com.hazelcast.jet.impl.JobRepository.clearSnapshotData(JobRepository.java:464)
at com.hazelcast.jet.impl.MasterJobContext.tryStartJob(MasterJobContext.java:233)
at com.hazelcast.jet.impl.JobCoordinationService.tryStartJob(JobCoordinationService.java:776)
at com.hazelcast.jet.impl.JobCoordinationService.lambda$submitJob$0(JobCoordinationService.java:200)
at com.hazelcast.jet.impl.JobCoordinationService$$Lambda$634/0x00000008009ce840.run(Unknown Source)
还有：
"hz._hzInstance_1_jet.async.thread-2" #81 prio=5 os_prio=0 cpu=0.00ms elapsed=661.98s tid=0x0000025bb23ef000 nid=0x43bc in Object.wait() [0x0000005d492fe000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(java.base@11/Native Method)
- waiting on <no object reference available>
at com.hazelcast.spi.impl.AbstractCompletableFuture.get(AbstractCompletableFuture.java:229)
- waiting to re-lock in wait() <0x0000000725600100> (a com.hazelcast.internal.util.SimpleCompletableFuture)
at com.hazelcast.spi.impl.AbstractCompletableFuture.get(AbstractCompletableFuture.java:191)
at com.hazelcast.spi.impl.operationservice.impl.InvokeOnPartitions.invoke(InvokeOnPartitions.java:88)
at com.hazelcast.spi.impl.operationservice.impl.OperationServiceImpl.invokeOnAllPartitions(OperationServiceImpl.java:385)
at com.hazelcast.map.impl.proxy.MapProxySupport.removeAllInternal(MapProxySupport.java:619)
at com.hazelcast.map.impl.proxy.MapProxyImpl.removeAll(MapProxyImpl.java:285)
at com.hazelcast.jet.impl.JobRepository.deleteJob(JobRepository.java:332)
at com.hazelcast.jet.impl.JobRepository.completeJob(JobRepository.java:316)
at com.hazelcast.jet.impl.JobCoordinationService.completeJob(JobCoordinationService.java:576)
at com.hazelcast.jet.impl.MasterJobContext.lambda$finalizeJob$13(MasterJobContext.java:620)
at com.hazelcast.jet.impl.MasterJobContext$$Lambda$783/0x0000000800b26840.run(Unknown Source)
at com.hazelcast.jet.impl.MasterJobContext.finalizeJob(MasterJobContext.java:632)
at com.hazelcast.jet.impl.MasterJobContext.onCompleteExecutionCompleted(MasterJobContext.java:564)
at com.hazelcast.jet.impl.MasterJobContext.lambda$invokeCompleteExecution$6(MasterJobContext.java:544)
at com.hazelcast.jet.impl.MasterJobContext$$Lambda$779/0x0000000800b27840.accept(Unknown Source)
at com.hazelcast.jet.impl.MasterContext.lambda$invokeOnParticipants$0(MasterContext.java:242)
at com.hazelcast.jet.impl.MasterContext$$Lambda$726/0x0000000800a1c040.accept(Unknown Source)
at com.hazelcast.jet.impl.util.Util$2.onResponse(Util.java:172)
at com.hazelcast.spi.impl.AbstractInvocationFuture$1.run(AbstractInvocationFuture.java:256)
at java.util.concurrent.ThreadPoolExecutor.runWorker(java.base@11/ThreadPoolExecutor.java:1128)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(java.base@11/ThreadPoolExecutor.java:628)
at java.lang.Thread.run(java.base@11/Thread.java:834)
at com.hazelcast.util.executor.HazelcastManagedThread.executeRun(HazelcastManagedThread.java:64)
at com.hazelcast.util.executor.HazelcastManagedThread.run(HazelcastManagedThread.java:80)
我没有其他信息可以重现此问题，但是我希望有人会解决此问题，否则我的问题会帮助其他人：）
我的设置： -Java 11 -Hazelcast 3.12快照 -Hazelcast Jet 3.0快照（我无法还原到以前的版本，这会破坏我的逻辑；我需要将在3.1中添加的n：m连接） -CPU核心：4个 -RAM：7 GB -Jet模式：服务器，作为客户端连接到其他群集以插入最终数据。
有人遇到类似问题吗？问题是，不能简单地复制它，因此很难为Hazelcast团队创建问题。只有线程转储和一般行为才能提示发生了什么。