Steps to reproduce:

1. start a process instance with variable "a", value "aValue"
2. start a second process instance with variable "a", value "aValue"
3. suspend second process instance
4. try to correlate as follows:

  Map<String, Object> correlationKeys = new HashMap<String, Object>();
  correlationKeys.put("a", "aValue");
  runtimeService.correlateMessage("aMessageName", correlationKeys);

-> a MismatchingMessageCorrelationException will be thrown:

Cannot correlate message aMessageName with process instance business key null and correlation keys {a=aValue}: 2 executions match the correlation keys. Should be one or zero.

Problem:
The suspended process instance has been also found.

Expected behavior:
Only active executions will be used to correlate a message.

Hint:
The same with a suspended ProcessDefinition. If a ProcessDefinition is suspendend it should not be possible to correlate against it, to start a new process instance.