Executions are not found, Job assumed on DLQ

Flowable Engine
1

We’re searching for an execution by the event subscription and a process variable value, but more often than not we’re getting a null result.

Execution execution = runtimeService.createExecutionQuery()
            .processVariableValueEquals("CASE_ID", "123")
            .messageEventSubscriptionName("subscription")
            .singleResult();

The assumption is that this job has somehow ended up on the DLQ, but I haven’t found a way of searching the DLQ using the information that I have at hand. I don’t have the process instance IDs available. Any ideas how I can search for just one specific job, so that it can be moved across for processing?

2

Hi jb-pc,

I would need more detailed description. When you are getting null → there is no execution waiting on the message.
If job fails (by default 3x) is moved to DeadLetterQueue. If you want to search for something:

  1. use implemented queries,
  2. implement native queries,
  3. use custom mappings

Regards
Martin

3

Hi Martin,

What more detail do you need? I’m not sure why there is no execution waiting on the message, there should be, and a few do proceed to the next stage when using the same code. Can I search using the process variables?

Thanks,
JB

4

The best would be if you can create a jUnit test to reproduce your issue.
Regards
Martin

5

Hi Martin,

I can’t reproduce the issue - I’m trying to find out why my execution is null, and how I can search the DLQ. Have you got some documentation for either of those?

Thanks,
JB