Fail fast when systemic error occurs in poll (#8749)

Most of the ae.c backends didn't explicitly handle errors, and instead
ignored all errors and did an implicit retry.
This is desired for EAGAIN and EINTER, but in case of other systematic
errors, we prefer to fail and log the error we got rather than get into a busy loop.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/ae_kqueue.c b/src/ae_kqueue.c
index b146f2519..8666b03cf 100644
--- a/src/ae_kqueue.c
+++ b/src/ae_kqueue.c
@@ -130,7 +130,10 @@ static int aeApiPoll(aeEventLoop *eventLoop, struct timeval *tvp) {
             eventLoop->fired[j].fd = e->ident;
             eventLoop->fired[j].mask = mask;
         }
+    } else if (retval == -1 && errno != EINTR) {
+        panic("aeApiPoll: kevent, %s", strerror(errno));
     }
+
     return numevents;
 }