twice termination delay only after SIGALRM, otherwise many separate SIGCHLD
and SIGIO signals quickly increase delay to the level when SIGKILL is sent
diff --git a/src/os/unix/ngx_process.c b/src/os/unix/ngx_process.c
index f163651..48ba9d4 100644
--- a/src/os/unix/ngx_process.c
+++ b/src/os/unix/ngx_process.c
@@ -373,6 +373,7 @@
break;
case SIGALRM:
+ ngx_sigalrm = 1;
break;
case SIGIO:
diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
index 9cf594d..21521ec 100644
--- a/src/os/unix/ngx_process_cycle.c
+++ b/src/os/unix/ngx_process_cycle.c
@@ -37,6 +37,7 @@
sig_atomic_t ngx_reap;
sig_atomic_t ngx_sigio;
+sig_atomic_t ngx_sigalrm;
sig_atomic_t ngx_terminate;
sig_atomic_t ngx_quit;
sig_atomic_t ngx_debug_quit;
@@ -142,7 +143,10 @@
for ( ;; ) {
if (delay) {
- delay *= 2;
+ if (ngx_sigalrm) {
+ delay *= 2;
+ ngx_sigalrm = 0;
+ }
ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
"termination cycle: %d", delay);
diff --git a/src/os/unix/ngx_process_cycle.h b/src/os/unix/ngx_process_cycle.h
index 8ef0c31..f46ad46 100644
--- a/src/os/unix/ngx_process_cycle.h
+++ b/src/os/unix/ngx_process_cycle.h
@@ -46,6 +46,7 @@
extern sig_atomic_t ngx_reap;
extern sig_atomic_t ngx_sigio;
+extern sig_atomic_t ngx_sigalrm;
extern sig_atomic_t ngx_quit;
extern sig_atomic_t ngx_debug_quit;
extern sig_atomic_t ngx_terminate;
