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b73a278df4
In the new master-worker architecture, when a worker process is forked and successfully initialized it needs somehow to communicate its "READY" state to the master, in order to terminate the previous worker and workers, that might exceeded max_reloads counter. So, let's implement for this a new master CLI _send_status command. A new worker can send its status string "READY" to the master, when it's about entering to the run poll loop, thus it can start to receive data. In _send_status() in the master context we update the status of the new worker: PROC_O_INIT flag is withdrawn. When TERM signal is sent to a worker, worker terminates and this triggers the mworker_catch_sigchld() handler in master. This handler deletes the exiting process entry from the processes list. In _send_status() we loop over the processes list twice. At the first time, in order to stop workers that exceeded the max_reloads counter. At the second time, in order to stop the worker forked before the last reload. In the corner case, when max_reloads=1, we avoid to send SIGTERM twice to the same worker by setting sigterm_sent flag during the first loop. |
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