I have one question, during my workflow execution, it catches this exception but, it seems that my current execution is not affected.
How does this happen? I’m sure previous executions are all failed or terminated.
Below is the exception. Thanks in advance 
{
"message":"Failure handling event 4 of type 'EVENT_TYPE_WORKFLOW_TASK_STARTED' during execution. {WorkflowTaskStartedEventId=4, CurrentStartedEventId=4}",
"source":"JavaSDK",
"stackTrace":"io.temporal.internal.statemachines.WorkflowStateMachines.createEventProcessingException(WorkflowStateMachines.java:389)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEventsBatch(WorkflowStateMachines.java:309)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEvent(WorkflowStateMachines.java:272)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.applyServerHistory(ReplayWorkflowRunTaskHandler.java:249)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTaskImpl(ReplayWorkflowRunTaskHandler.java:231)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTask(ReplayWorkflowRunTaskHandler.java:165)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTaskWithQuery(ReplayWorkflowTaskHandler.java:135)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTask(ReplayWorkflowTaskHandler.java:100)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handleTask(WorkflowWorker.java:446)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:337)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:278)\nio.temporal.internal.worker.PollTaskExecutor.lambda$process$0(PollTaskExecutor.java:105)\njava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\njava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\njava.lang.Thread.run(Thread.java:748)\n",
"encodedAttributes":null,
"cause":{
"message":"WorkflowTask: failure executing SCHEDULED->WORKFLOW_TASK_STARTED, transition history is [CREATED->WORKFLOW_TASK_SCHEDULED]",
"source":"JavaSDK",
"stackTrace":"io.temporal.internal.statemachines.StateMachine.executeTransition(StateMachine.java:163)\nio.temporal.internal.statemachines.StateMachine.handleHistoryEvent(StateMachine.java:103)\nio.temporal.internal.statemachines.EntityStateMachineBase.handleEvent(EntityStateMachineBase.java:84)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleSingleEvent(WorkflowStateMachines.java:439)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEventsBatch(WorkflowStateMachines.java:307)\nio.temporal.internal.statemachines.WorkflowStateMachines.handleEvent(WorkflowStateMachines.java:272)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.applyServerHistory(ReplayWorkflowRunTaskHandler.java:249)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTaskImpl(ReplayWorkflowRunTaskHandler.java:231)\nio.temporal.internal.replay.ReplayWorkflowRunTaskHandler.handleWorkflowTask(ReplayWorkflowRunTaskHandler.java:165)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTaskWithQuery(ReplayWorkflowTaskHandler.java:135)\nio.temporal.internal.replay.ReplayWorkflowTaskHandler.handleWorkflowTask(ReplayWorkflowTaskHandler.java:100)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handleTask(WorkflowWorker.java:446)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:337)\nio.temporal.internal.worker.WorkflowWorker$TaskHandlerImpl.handle(WorkflowWorker.java:278)\nio.temporal.internal.worker.PollTaskExecutor.lambda$process$0(PollTaskExecutor.java:105)\njava.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\njava.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\njava.lang.Thread.run(Thread.java:748)\n",
"encodedAttributes":null,
"cause":{
"message":"Both StartToCloseTimeout and ScheduleToCloseTimeout aren't specified for actionA activity. Please set at least one of the above through the ActivityStub or WorkflowImplementationOptions.",
"source":"JavaSDK",
"stackTrace":"io.temporal.internal.sync.ActivityInvocationHandler.getActivityFunc(ActivityInvocationHandler.java:76)\nio.temporal.internal.sync.ActivityInvocationHandlerBase.invoke(ActivityInvocationHandlerBase.java:59)\ncom.sun.proxy.$Proxy175.actionA(Unknown Source)\ncom.temporal.demos.checking.workflows.impl.checkingWorkflowImpl.dochecking(checkingWorkflowImpl.java:51)\nsun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\nsun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\nsun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\njava.lang.reflect.Method.invoke(Method.java:498)\nio.temporal.internal.sync.POJOWorkflowImplementationFactory$POJOWorkflowImplementation$RootWorkflowInboundCallsInterceptor.execute(POJOWorkflowImplementationFactory.java:342)\nio.temporal.common.interceptors.WorkflowInboundCallsInterceptorBase.execute(WorkflowInboundCallsInterceptorBase.java:40)\nio.temporal.opentracing.internal.OpenTracingWorkflowInboundCallsInterceptor.execute(OpenTracingWorkflowInboundCallsInterceptor.java:73)\nio.temporal.internal.sync.POJOWorkflowImplementationFactory$POJOWorkflowImplementation.execute(POJOWorkflowImplementationFactory.java:317)\n",
"encodedAttributes":null,
"cause":null,
"applicationFailureInfo":{
"type":"java.lang.IllegalArgumentException",
"nonRetryable":false,
"details":null
}
},
"applicationFailureInfo":{
"type":"java.lang.RuntimeException",
"nonRetryable":false,
"details":null
}
},
"applicationFailureInfo":{
"type":"io.temporal.internal.statemachines.InternalWorkflowTaskException",
"nonRetryable":false,
"details":null
}
}