[CRITICAL] fix server state tracking: it was O(n!) instead of O(n)
Using the wrong operator (&& instead of &) causes DOWN->UP
transition to take longer than it should and to produce a lot of
redundant logs. With typical "track" usage (1-6 tracking servers) it
shouldn't make a big difference but for heavily tracked servers
this bug leads to hang with 100% CPU usage and extremely big
log spam.
diff --git a/src/checks.c b/src/checks.c
index eb316cb..1acff0d 100644
--- a/src/checks.c
+++ b/src/checks.c
@@ -161,7 +161,7 @@
s->down_trans++;
- if (s->state && SRV_CHECKED)
+ if (s->state & SRV_CHECKED)
for(srv = s->tracknext; srv; srv = srv->tracknext)
set_server_down(srv);
}
@@ -226,7 +226,7 @@
Warning("%s", trash);
send_log(s->proxy, LOG_NOTICE, "%s", trash);
- if (s->state && SRV_CHECKED)
+ if (s->state & SRV_CHECKED)
for(srv = s->tracknext; srv; srv = srv->tracknext)
set_server_up(srv);
}
@@ -277,7 +277,7 @@
if (!s->proxy->srv_bck && !s->proxy->srv_act)
set_backend_down(s->proxy);
- if (s->state && SRV_CHECKED)
+ if (s->state & SRV_CHECKED)
for(srv = s->tracknext; srv; srv = srv->tracknext)
set_server_disabled(srv);
}
@@ -317,7 +317,7 @@
Warning("%s", trash);
send_log(s->proxy, LOG_NOTICE, "%s", trash);
- if (s->state && SRV_CHECKED)
+ if (s->state & SRV_CHECKED)
for(srv = s->tracknext; srv; srv = srv->tracknext)
set_server_enabled(srv);
}