Exception for engine bpmn during async job acquisition: null

Flowable Engine
1

im new to flowable,im getting exception as

ERROR [flowable-bpmn-acquire-async-jobs] org.flowable.job.service.impl.asyncexecutor.AcquireAsyncJobsDueRunnable.acquireAndExecuteJobs.#103 - exception for engine bpmn during async job acquisition: null
java.lang.NullPointerException: null
at org.flowable.spring.job.service.SpringAsyncExecutor.executeAsyncJob(SpringAsyncExecutor.java:81)
at org.flowable.job.service.impl.asyncexecutor.AcquireAsyncJobsDueRunnable.offerJobs(AcquireAsyncJobsDueRunnable.java:112)

TaskExecutor is null

My Xml is has only one service :

    <serviceTask id="fetchTxnId"
    			name="Process after approval" flowable:async="true"
    			flowable:class="org.flowable.FlowableRetry">
    			<extensionElements>
    				<flowable:failedJobRetryTimeCycle>R5/PT1M
    				</flowable:failedJobRetryTimeCycle>
    			</extensionElements>
    	</serviceTask>
2

Hey @gopal1,

How exactly are you creating the process engine configuration? Are you using Spring Boot?

Cheers,
Filip

3

@filiphr thanks for the reply,Yes using spring boot ,added dependency flowable-spring-boot-starter 6.4.2. process engine configuration i haven’t changed ,i left with default configuration.

And when if i add one more class with

 public class Configuration {

    	@Process
    	@Bean
    	public TaskExecutor processTaskExecutor() {
    		return new SimpleAsyncTaskExecutor();
    	}

    	@Cmmn
    	@Bean
    	public TaskExecutor cmmnTaskExecutor() {
    		return new SyncTaskExecutor();
    	}
    }

then im getting error as

Exception in thread "SimpleAsyncTaskExecutor-2" org.flowable.common.engine.api.FlowableException: failedJobRetryTimeCycle has wrong format:R5/PT2
        				
            	at org.flowable.engine.impl.cmd.JobRetryCmd.execute(JobRetryCmd.java:127)
            	at org.flowable.engine.impl.interceptor.CommandInvoker$1.run(CommandInvoker.java:51)
            	at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperation(CommandInvoker.java:93)
            	at org.flowable.engine.impl.interceptor.CommandInvoker.executeOperations(CommandInvoker.java:72)
            	at org.flowable.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:56)