[ptp-dev] Problem with SDM debugger master process startup

[Dave Wootton <dwootton@xxxxxxxxxx>]

I found a problem with startup of the SDM master process that appears to 
be timing related. My PE proxy code waits for the PE attach.cfg file to be 
created, which means all PE application processes have started, before 
attempting to start the SDM master process. Debug startup hangs at this 
point, and if I look at the console log, I see a message 'No port found 
for the sdm child. hostname: k17sf2p03'
If I call 'sleep(5) after the attach.cfg file is cretaed but just before 
invoking the SDM master process, then the debugger starts reliably.

This acts as if there is enough of a delay between when the SDM child 
processes are invoked and when they open a port for the sdm master to 
connect to them. Should the SDM master code that is trying to connect to 
the child SDM processes have some retry logic with an eventual timeout if 
it cannot connect to the child SDM processes?

Right now, I have kept the 5 second sleep() invocation in the code in the 
patch I just submitted for bug 251853 so that my proxy can start the 
debugger.
Dave