Unable to use In Memory Process Engine Configuration

Camunda 7 Topics Discussion & Questions
1

Hey there,

I’m trying to use camunda to control a robot and therefore I wanted to execute the ProcessEngine on the Controller which runs a Windows embedded.

The application works fine in my virtual maschine, but as soon, as I execute it within the control framework of the robot, I get an exception of the type ClassCastException. It occurs when the method createStandaloneInMemProcessEngineConfiguration is called.

If someone could have a look at the stacktrace in the attached pictures, I would really appreciate it.

Thanks in advance, best regards,
Hendrik

Camunda_Classcast_02.png523×656 33.8 KB
Camunda_Classcast_01.png522×658 33.9 KB

2

Hi @hoestreich,

could you tell us a bit more about execution environment? which engine version, which jvm and which database are you running against?

Cheers,
Askar

3

Hey, sure,

we’re using engine version 7.5 running with jvm 1.8 and since we have not configured anything special for the database I would assume that camunda is using the default h2 database for in memory process engine.

If you need more information don’t hesitate to ask.

In general it’s a Kuka Controller with a Windows embedded with a real time extension (which should not really matter).

Best regards,
Hendrik

4

hi @hoestreich,

could you post here the output of set command in your environment?

cheers,
Askar

5

Hi @aakhmerov,

The output looks like this:

C:\Users\KukaUser>set
ALLUSERSPROFILE=C:\ProgramData
APPDATA=C:\Users\KukaUser\AppData\Roaming
CommonProgramFiles=c:\Program Files\Common Files
COMPUTERNAME=WINDOWS-1FUUT06
ComSpec=C:\windows\system32\cmd.exe
FP_NO_HOST_CHECK=NO
HOMEDRIVE=C:
HOMEPATH=\Users\KukaUser
KRCSetupExit=0
LOCALAPPDATA=C:\Users\KukaUser\AppData\Local
LOGONSERVER=\\WINDOWS-1FUUT06
NUMBER_OF_PROCESSORS=1
OS=Windows_NT
Path=C:\ProgramData\Oracle\Java\javapath;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\KRC\Shared;C:\KRC\maven\bin
PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
PROCESSOR_ARCHITECTURE=x86
PROCESSOR_IDENTIFIER=x86 Family 6 Model 60 Stepping 3, GenuineIntel
PROCESSOR_LEVEL=6
PROCESSOR_REVISION=3c03
ProgramData=C:\ProgramData
ProgramFiles=c:\Program Files
PROMPT=$P$G
PSModulePath=C:\windows\system32\WindowsPowerShell\v1.0\Modules\
PUBLIC=C:\Users\Public
RTE_ROOT=C:\KRC\VXWIN
SESSIONNAME=RDP-Tcp#1
SystemDrive=C:
SystemRoot=C:\windows
TEMP=C:\Users\KukaUser\AppData\Local\Temp
TMP=C:\Users\KukaUser\AppData\Local\Temp
USERDOMAIN=WINDOWS-1FUUT06
USERNAME=KukaUser
USERPROFILE=C:\Users\KukaUser
windir=C:\windows

Any hints hidden in this?

6

@hoestreich,

not really, could you please check what is inside C:\ProgramData\Oracle\Java\javapath folder.

Cheers,
Askar

7

There are the java binaries (version 1.8)

C:\ProgramData\Oracle\Java\javapath>dir
 Volume in drive C is KUKA_DISK
 Volume Serial Number is 84C8-17AE

 Directory of C:\ProgramData\Oracle\Java\javapath

10/28/2016  12:12 PM    <DIR>          .
10/28/2016  12:12 PM    <DIR>          ..
10/28/2016  12:12 PM           191,040 java.exe
10/28/2016  12:12 PM           191,552 javaw.exe
10/28/2016  12:12 PM           268,864 javaws.exe
               3 File(s)        651,456 bytes
               2 Dir(s)  26,641,047,552 bytes free
8

@hoestreich, that does not look like a full jre or jdk to me. Could you try replacing it with proper installation of jdk?

Cheers,
Askar.

9

Hey @aakhmerov,

I will have a look and maybe adapt the path, since there should already be an proper installation, maybe it’s just not used correctly yet.

Unfortunately we had to give the controller / pc to some maintenance / installation work so it might take some tome till I have the time to do what I wrote before.

But I will keep you updatet. Thanks for your support!

Best regards, Hendrik