In BPEL process if you use "wait", the result may depend on if it's synch or asynch. I found it out the hard way. I suspect it's documented somewhere by Oracle. I just haven't found it.
Synch: if you use "wait" for 3 seconds in a synch BPEL, you'll get a time out exception. I don't know why it does that. If you wait for 1 or 2 seconds, it simply ignores the wait. That's because the server uses "MinBPELWait" as the threshhold, the default is 2 sec.
Asych: works without any problem.
If you are too deep into your "synch" BPEL process, and doesn't want to start allover, just go to your WSDL, take out the "output" in your operation. Then go to your BPEL, take out the last reply. That converts your synch into "one-way", essentially it's almost the same as "asynch", you just don't have the callback operation.
Additionally, you can go clean out the synch response message etc. Or you can add callback in the WSDL to make it asynch.
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