Dispatch Task: position_line failed

[lxjxiaojun]

I installed a standalone-server, run several test jobs and work fine. But suddenly all the jobs can't run any more and it shows 任务实例host为空。And after I restart server, everything works again.

Here is the log:
[ERROR] 2024-04-08 11:58:19.123 +0800 o.a.d.s.m.r.GlobalTaskDispatchWaitingQueueLooper:[86] - Dispatch Task: position_line failed
org.apache.dolphinscheduler.server.master.exception.TaskDispatchException: Dispatch task to 192.168.161.100:1234 failed
at org.apache.dolphinscheduler.server.master.runner.dispatcher.WorkerTaskDispatcher.doDispatch(WorkerTaskDispatcher.java:70)
at org.apache.dolphinscheduler.server.master.runner.BaseTaskDispatcher.dispatchTask(BaseTaskDispatcher.java:64)
at org.apache.dolphinscheduler.server.master.runner.GlobalTaskDispatchWaitingQueueLooper.run(GlobalTaskDispatchWaitingQueueLooper.java:78)
Caused by: org.apache.dolphinscheduler.extract.base.exception.MethodInvocationException: null
at org.apache.dolphinscheduler.extract.base.exception.MethodInvocationException.of(MethodInvocationException.java:27)
at org.apache.dolphinscheduler.extract.base.client.SyncClientMethodInvoker.invoke(SyncClientMethodInvoker.java:48)
at org.apache.dolphinscheduler.extract.base.client.ClientInvocationHandler.invoke(ClientInvocationHandler.java:55)
at com.sun.proxy.$Proxy858.dispatchTask(Unknown Source)
at org.apache.dolphinscheduler.server.master.runner.dispatcher.WorkerTaskDispatcher.doDispatch(WorkerTaskDispatcher.java:62)
... 2 common frames omitted
[ERROR] 2024-04-08 11:58:19.124 +0800 o.a.d.e.b.s.JsonSerializer:[77] - serializeToString exception!
com.fasterxml.jackson.databind.JsonMappingException: Null key for a Map not allowed in JSON (use a converting NullKeySerializer?) (through reference chain: org.apache.dolphinscheduler.extract.worker.transportor.TaskInstanceDispatchRequest["taskExecutionContext"]->org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext["prepareParamsMap"]->java.util.HashMap["null"])
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:283)
at com.fasterxml.jackson.databind.SerializerProvider.mappingException(SerializerProvider.java:1358)
at com.fasterxml.jackson.databind.SerializerProvider.reportMappingProblem(SerializerProvider.java:1254)
at com.fasterxml.jackson.databind.ser.impl.FailingSerializer.serialize(FailingSerializer.java:32)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.java:791)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeWithoutTypeInfo(MapSerializer.java:764)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:720)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:35)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4568)
at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3821)
at org.apache.dolphinscheduler.extract.base.serialize.JsonSerializer.serialize(JsonSerializer.java:75)
at org.apache.dolphinscheduler.extract.base.StandardRpcRequest.of(StandardRpcRequest.java:42)
at org.apache.dolphinscheduler.extract.base.client.SyncClientMethodInvoker.invoke(SyncClientMethodInvoker.java:42)
at org.apache.dolphinscheduler.extract.base.client.ClientInvocationHandler.invoke(ClientInvocationHandler.java:55)
at com.sun.proxy.$Proxy858.dispatchTask(Unknown Source)
at org.apache.dolphinscheduler.server.master.runner.dispatcher.WorkerTaskDispatcher.doDispatch(WorkerTaskDispatcher.java:62)
at org.apache.dolphinscheduler.server.master.runner.BaseTaskDispatcher.dispatchTask(BaseTaskDispatcher.java:64)
at org.apache.dolphinscheduler.server.master.runner.GlobalTaskDispatchWaitingQueueLooper.run(GlobalTaskDispatchWaitingQueueLooper.java:78)
[INFO] 2024-04-08 11:58:19.124 +0800 o.a.d.s.w.r.o.TaskInstanceDispatchOperationFunction:[53] - Receive TaskInstanceDispatchRequest: null
[ERROR] 2024-04-08 11:58:19.124 +0800 o.a.d.e.b.s.JdkDynamicServerHandler:[115] - Invoke method public abstract org.apache.dolphinscheduler.extract.worker.transportor.TaskInstanceDispatchResponse org.apache.dolphinscheduler.extract.worker.ITaskInstanceOperator.dispatchTask(org.apache.dolphinscheduler.extract.worker.transportor.TaskInstanceDispatchRequest) failed, null.
java.lang.NullPointerException: null

[lxjxiaojun]

The version is 3.2.1, btw.

[dwave]

i have same probleam

[WI-0][TI-0] - [INFO] 2025-04-30 09:02:58.439 +0800 o.a.d.s.m.r.t.TaskGroupCoordinator:[127] - TaskGroupCoordinator round time cost: 3/ms
[WI-0][TI-0] - [INFO] 2025-04-30 09:03:03.448 +0800 o.a.d.s.m.r.t.TaskGroupCoordinator:[127] - TaskGroupCoordinator round time cost: 3/ms
[WI-0][TI-0] - [ERROR] 2025-04-30 09:03:03.926 +0800 o.a.d.s.m.r.GlobalTaskDispatchWaitingQueueLooper:[86] - Dispatch Task: loginForOperator failed
org.apache.dolphinscheduler.server.master.exception.TaskDispatchException: Dispatch task to dolphinscheduler-worker-1.dolphinscheduler-worker-headless:1234 failed
at org.apache.dolphinscheduler.server.master.runner.dispatcher.WorkerTaskDispatcher.doDispatch(WorkerTaskDispatcher.java:70)
at org.apache.dolphinscheduler.server.master.runner.BaseTaskDispatcher.dispatchTask(BaseTaskDispatcher.java:64)
at org.apache.dolphinscheduler.server.master.runner.GlobalTaskDispatchWaitingQueueLooper.run(GlobalTaskDispatchWaitingQueueLooper.java:78)
Caused by: org.apache.dolphinscheduler.extract.base.exception.MethodInvocationException: null
at org.apache.dolphinscheduler.extract.base.exception.MethodInvocationException.of(MethodInvocationException.java:27)
at org.apache.dolphinscheduler.extract.base.client.SyncClientMethodInvoker.invoke(SyncClientMethodInvoker.java:48)
at org.apache.dolphinscheduler.extract.base.client.ClientInvocationHandler.invoke(ClientInvocationHandler.java:55)
at com.sun.proxy.$Proxy231.dispatchTask(Unknown Source)
at org.apache.dolphinscheduler.server.master.runner.dispatcher.WorkerTaskDispatcher.doDispatch(WorkerTaskDispatcher.java:62)
... 2 common frames omitted
[WI-0][TI-0] - [ERROR] 2025-04-30 09:03:03.927 +0800 o.a.d.e.b.s.JsonSerializer:[77] - serializeToString exception!
com.fasterxml.jackson.databind.JsonMappingException: Null key for a Map not allowed in JSON (use a converting NullKeySerializer?) (through reference chain: org.apache.dolphinscheduler.extract.worker.transportor.TaskInstanceDispatchRequest["taskExecutionContext"]->org.apache.dolphinscheduler.plugin.task.api.TaskExecutionContext["prepareParamsMap"]->java.util.HashMap["null"])
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:283)
at com.fasterxml.jackson.databind.SerializerProvider.mappingException(SerializerProvider.java:1358)
at com.fasterxml.jackson.databind.SerializerProvider.reportMappingProblem(SerializerProvider.java:1254)
at com.fasterxml.jackson.databind.ser.impl.FailingSerializer.serialize(FailingSerializer.java:32)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.java:791)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeWithoutTypeInfo(MapSerializer.java:764)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:720)
at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:35)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728)
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774)
at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480)
at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
at com.fasterxml.jackson.databind.ObjectMapper._writeValueAndClose(ObjectMapper.java:4568)
at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3821)
at org.apache.dolphinscheduler.extract.base.serialize.JsonSerializer.serialize(JsonSerializer.java:75)
at org.apache.dolphinscheduler.extract.base.StandardRpcRequest.of(StandardRpcRequest.java:42)
at org.apache.dolphinscheduler.extract.base.client.SyncClientMethodInvoker.invoke(SyncClientMethodInvoker.java:42)
at org.apache.dolphinscheduler.extract.base.client.ClientInvocationHandler.invoke(ClientInvocationHandler.java:55)
at com.sun.proxy.$Proxy231.dispatchTask(Unknown Source)
at org.apache.dolphinscheduler.server.master.runner.dispatcher.WorkerTaskDispatcher.doDispatch(WorkerTaskDispatcher.java:62)
at org.apache.dolphinscheduler.server.master.runner.BaseTaskDispatcher.dispatchTask(BaseTaskDispatcher.java:64)
at org.apache.dolphinscheduler.server.master.runner.GlobalTaskDispatchWaitingQueueLooper.run(GlobalTaskDispatchWaitingQueueLooper.java:78)