Camunda Run issue

Camunda 7 Topics Discussion & Questions
1

Hie everyone,

I followed Niall’s tutorial to get started with camunda BPM Modeler & camunda Run as you described here:

When I download the current version of Camunda Run platform here:

https://downloads.camunda.cloud/release/camunda-bpm/run/7.16/

The windows bash file only opens for 1 sec and afterwards closes again.

Do you know why that error appears? Perhaps anyone has had it before as well.

In comparison, the tomcat program runs successfully but is not sufficient I assume as I want to build and deploy my own workflow.

I highly appreciate any feedback from you :blush:

Best Regards
Max

2

Hi @MSc_Conet
Can you take a look in the log file for any errors that might be happening.
You’ll find it in thelog folder

3

Hi @Niall

where do I find the log folder?

4

Should be in the same root directory as the start.batfile you’re running.

5

looks like there is no log folder:

camunda_log
camunda_log1174×324 34.7 KB

6

Alrighty… :slight_smile:
New plan! We can try to run it from a terminal window.
if you hold shift and right click inside the directory you should have an option to open powershell - from there you can enter ./start.batand it’ll try to startup without closing the window.

That should show what the problem is with starting it

7

looks like I am missing the newest Java version :slight_smile:

camunda_start.bat_powershell
camunda_start.bat_powershell1066×122 29.2 KB

thanks!

8

Great, let me know if you manage to get it working :slight_smile:

9

Hi @Niall
got it working, thanks!

opening the localhost:8080 it shows the following. But I am missing user credentials. it is not demo:demo?

camunda_welcome
camunda_welcome1026×723 29.5 KB

BR
Max

10

looks like this was caused by a NoClassDefFoundError :smiley:

camunda_servlet_error
camunda_servlet_error1855×374 179 KB

Does anyone know where that error derives from?

BR Max

11

Can you make sure that you’re using a java version before java 15.
Java 15 wont be supported until the next release so it could be causing problems

12

I downgraded to 14 and it works now! thank you :slight_smile:

1 Like
13

I am currently trying to invoke a simple workflow via REST API (this worked already via Postman) from my application in my SAP Cloud system. There I am calling a destination which looks similar to the URL from Postman. This fails - I was wondering if that could work? As I am calling localhost camunda REST API from my cloud SAP environment. Do you know if in this case I would have to change the target URL from camunda?

BR
Max

camunda_destination
camunda_destination838×218 16 KB

14

In what way exactly does it fail?
What specific rest call are you trying to make. I see you’re pointing at the rest end point but i don’t see which call you’re making

15

this is in my Java Script Code to call the destination and append it with what I need.
This has been done before with another destination for SAP Workflow engine. Now I tried the same for camunda and thought it might work ;). “test_workflow” is my test workflow ID which I deployed to camunda Run platform.

const workflow = await cds.connect.to(‘workflow_camunda’);
wf_instance = await workflow.tx(req).post(’/process-definition/key/test_workflow/start’,
{ })
return wf_instance;

16

And can you explain how exactly it fails?

17

well, the error messages say internal error and that the URL is not reachable. after thinking about this it makes sense to me as my camunda runs locally for myself on localhost. but in the cloud for my SAP app localhost is the cloud itself and thus not my local camunda. That would mean I need a REST API in the internet from camunda. Do you know if there is an API reachable through the internet?

18

Awww ok, you if you’re not running the SAP thing locally that wont work.
You need to either open up the port on your local machine so that you can reach it from outside.
Or
Deploy camunda to a server somewhere

19

I have done the last thing and deployed it somewhere. That works! thanks!
I got two more questions :smiley:

  1. can I put fields next to each other inside a form or does ist only work below each other?
    camunda_form
    camunda_form1598×312 32 KB
20
  1. the expression for exclusive gateways works on buttons (actions reset and submit)? I receive an error as implemented below (my buttons key is “rejectButton”).
    Maybe I could provide two options (approve, reject) in a textfield as a dropdown?

camunda_gateway

I would be thankful for any feedback!

BR
Max