On 2015-05-15 AM 05:01, Pavel Stehule wrote: > > I am trying to start bgworker from bgworker and create communication > between these process. I have a code based on test_shm_mq. This code fails > because BackendPidGetProc doesn't find related bgworker process, although > the registrant process is living >
One reason for this may be that the worker was not started with the flag BGWORKER_SHMEM_ACCESS which is necessary to perform InitProcess() that would initialize a PGPROC entry for it. But if you'd used the same method for initializing workers as test_shm_mq_setup(), then it should have.