Buisnesskey duplicate possible

[billdoor]

long story short, while testing a class that starts Processes, i ran into unexpected results while trying to start the same Process twice with the same Businesskey:

 @Test (expected = IllegalArgumentException.class)
    @Deployment(resources  = {"test_process.bpmn"})
    public void startProcess_duplicateBkey() {
        rule.getRuntimeService().startProcessInstanceByKey("test_process", "a1");
        rule.getRuntimeService().startProcessInstanceByKey("test_process", "a1");
        System.out.println(rule.getRuntimeService().createProcessInstanceQuery().processInstanceBusinessKey("a1", "test_process").list().size());
    }
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prints "2".

I thus have two instances of "test_process" with businesskey "a1". In my understanding, this should not be possible, should it?

[martin_grofcik]

There was an discussion about it and from some activiti release (I can not remember which one) business key unique constraint was removed.

Regards
Martin

[trademak]

Martin is correct, we removed the constraint in 5.15 or 5.16 I think. If you want it to be unique, you could query on it before starting a new process instance, but there are also use cases where duplicates are necessary.

Best regards,

[billdoor]

Yea i found the discussion. Besides the sideffect on the historytable i thought of the constraint as good. But this was talked over so thanks for the answer, i'll just have to query then

[jbarrez]

Or add the constraint yourself