Module: kamailio Branch: master Commit: 6af11bf9858921deb74cce351013b734e1b29a6f URL: https://github.com/kamailio/kamailio/commit/6af11bf9858921deb74cce351013b73… Author: Daniel-Constantin Mierla <miconda(a)gmail.com> Committer: GitHub <noreply(a)github.com> Date: 2017-04-28T08:35:55+02:00 Merge pull request #1101 from codyherzog/master core: Don't terminate on harmless SIGCHLD. --- Modified: src/main.c --- Diff: https://github.com/kamailio/kamailio/commit/6af11bf9858921deb74cce351013b73… Patch: https://github.com/kamailio/kamailio/commit/6af11bf9858921deb74cce351013b73… --- diff --git a/src/main.c b/src/main.c index 7781901..3fdf070 100644 --- a/src/main.c +++ b/src/main.c @@ -675,6 +675,7 @@ void handle_sigs(void) { pid_t chld; int chld_status; + int any_chld_stopped; int memlog; switch(sig_flag){ @@ -730,7 +731,9 @@ void handle_sigs(void) break; case SIGCHLD: + any_chld_stopped=0; while ((chld=waitpid( -1, &chld_status, WNOHANG ))>0) { + any_chld_stopped=1; if (WIFEXITED(chld_status)) LM_ALERT("child process %ld exited normally," " status=%d\n", (long)chld, @@ -747,6 +750,16 @@ void handle_sigs(void) " signal %d\n", (long)chld, WSTOPSIG(chld_status)); } + + /* If it appears that no child process has stopped, then do not terminate on SIGCHLD. + Certain modules like app_python can run external scripts which cause child processes to be started and + stopped. That can result in SIGCHLD being received here even though there is no real problem. Therefore, + we do not terminate Kamailio unless we can find the child process which has stopped. */ + if (!any_chld_stopped) { + LM_INFO("SIGCHLD received, but no child has stopped, ignoring it\n"); + break; + } + #ifndef STOP_JIRIS_CHANGES if (dont_fork) { LM_INFO("dont_fork turned on, living on\n");