DolphinScheduler exception resolution

Reference: Open Source Task Scheduling Platform Dolphinscheduler Deployment and Usage Guide (Unfinished)_Open Source Distributed Task Scheduling Platform_Elipsis Porter's Blog-CSDN Blog

1. Possible errors (serious): After the workflow stops, it cannot be deleted, and the log is refreshed repeatedly until the disk is full

[ERROR] 2023-08-16 10:14:21.387 +0800 org.apache.dolphinscheduler.server.master.event.WorkflowStartEventHandler:[72] - Failed to submit the workflow instance, will resend the workflow start event: WorkflowEvent(workflowEventType=START_WORKFLOW, workflowInstanceId=1038)
[INFO] 2023-08-16 10:14:21.387 +0800 org.apache.dolphinscheduler.server.master.event.WorkflowEventQueue:[38] - Added workflow event to workflowEvent queue, event: WorkflowEvent(workflowEventType=START_WORKFLOW, workflowInstanceId=1038)
[INFO] 2023-08-16 10:14:21.387 +0800 org.apache.dolphinscheduler.server.master.runner.WorkflowEventLooper:[78] - Workflow event looper receive a workflow event: WorkflowEvent(workflowEventType=START_WORKFLOW, workflowInstanceId=1038), will handle this
[INFO] 2023-08-16 10:14:21.387 +0800 org.apache.dolphinscheduler.server.master.event.WorkflowStartEventHandler:[54] - Handle workflow start event, begin to start a workflow, event: WorkflowEvent(workflowEventType=START_WORKFLOW, workflowInstanceId=1038)
[ERROR] 2023-08-16 10:14:21.387 +0800 org.apache.dolphinscheduler.server.master.runner.WorkflowExecuteRunnable:[704] - Start workflow error
java.lang.NullPointerException: null
    at org.apache.dolphinscheduler.service.utils.DagHelper.parsePostNodes(DagHelper.java:306)
    at org.apache.dolphinscheduler.server.master.runner.WorkflowExecuteRunnable.submitPostNode(WorkflowExecuteRunnable.java:1314)
    at org.apache.dolphinscheduler.server.master.runner.WorkflowExecuteRunnable.call(WorkflowExecuteRunnable.java:698)
    at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:750)
 

Produces a lot of logs:

workflowInstanceId=1038

Query the status of the DolphinScheduler table:

select t1.id,t1.task_code,t1.state,t2.state  from  t_ds_task_instance t1  left join  t_ds_process_instance t2  on t1.process_instance_id = t2.id where t2.id = 1038;

select id,name,state from t_ds_process_instance where id = 1038 limit 1;

update t_ds_process_instance set state = 7 where id = 1038;

docker cp dolphinscheduler:/opt/apache-dolphinscheduler-3.1.7-bin/standalone-server/logs/dolphinscheduler-standalone.2023-08-18_09.0.log dolphinscheduler-standalone.2023-08-18_09.0.log