We are currently using Camunda Platform 7 with Camunda External Task Client (Java) (camunda-bpm-platform/clients/java at master · camunda/camunda-bpm-platform · GitHub) and had today the issue that our External Task suddenly hung up and no further process instances could proceed the external task.
The problem could be resolved by restarting the External Task.
I am now trying to understand why the External Task hung up. Sadly there are no logs written that could be used to retrace the problem, neither in the External Task itself nor in the central process with which the bpmn is deployed.
I find a topic as my problem (External Task suddenly hung up)
I understand i only need upgrade Camunda External Task Client to new version client (7.20.0) then my problem is fixed or I must to add some other configruation.
Please help me and thank you very much