Optimistic Locking Exception with external task client

Camunda 7 Topics Discussion & Questions
1

Hi I’m seeing below exceptions in one of our external task client

externalTaskClient is written in java and it is running in two instances

this is my externaltaskclient configuration

client = ExternalTaskClient.create().baseUrl(bpmBaseUrl)
.addInterceptor(new BasicAuthProvider(pwd)).asyncResponseTimeout(55000)
.backoffStrategy(new ExponentialBackoffStrategy(3500L, 2, 60000L)).maxTasks(1).build();

org.camunda.bpm.client.exception.NotResumedException: TASK/CLIENT-01009 Exception while completing the external task: The corresponding process instance could not be resumed. Reason: status code: 500, reason phrase: {“type”:“OptimisticLockingException”,“message”:“ENGINE-03005 Execution of ‘UPDATE VariableInstanceEntity[ad2896ca-3664-11eb-a827-0edbc94d5605]’ failed. Entity was updated by another transaction concurrently.”}

TASK/CLIENT-01009 Exception while completing the external task: The corresponding process instance could not be resumed. Reason: status code: 500, reason phrase: {“type”:“OptimisticLockingException”,“message”:“ENGINE-03005 Execution of ‘UPDATE VariableInstanceEntity[ad2896ca-3664-11eb-a827-0edbc94d5605]’ failed. Entity was updated by another transaction concurrently.”}

2

Hi @avinashreddy

Can you take a look at the Style Guide? It’ll help you understand how to format code correctly and also help you create questions that are easy to understand and also easier to answer :slight_smile: