A watchdog notification may be handled after the watchdog timer was stopped
while stopping the service. As a result the timer is restarted and the
service may be restarted as well.
The watchdog timestamp is initially set during startup in
service_enter_start_post() and cleared when the timer is stopped. Therefore
it can be used as an indication if the timer should be reset.
---
src/core/service.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/core/service.c b/src/core/service.c
index 593946e..baddc5a 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -3400,7 +3400,8 @@ static void service_notify_message(Unit *u, pid_t pid,
char **tags) {
if (strv_find(tags, "WATCHDOG=1")) {
log_debug_unit(u->id,
"%s: got WATCHDOG=1", u->id);
- service_reset_watchdog(s);
+ if (dual_timestamp_is_set(&s->watchdog_timestamp))
+ service_reset_watchdog(s);
}
/* Notify clients about changed status or main pid */
--
1.7.10.4
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