COBOL programs are called remotely as services, they are entered from a C-main program (slave) that has been duplicated with fork() by a controlling master process. The COBOL runtime is already loaded dynamically when the master is started, so it is part of both the master and slave processes. Sometimes, processes get stuck (deadlock), due to the signal handlers.
Full article: https://portal.microfocus.com/s/article/KM000013931
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