We are getting lots of strange error messages from Apache 2.4 with the event mpm under load. [mpm_event:crit] [pid 9685:tid 28] (81)File descriptor in bad state: apr_pollset_poll failed. Attempting to shutdown process gracefully It appears to come from these lines in /httpd/tags/2.4.4/server/mpm/event/event.c 1455 rc = apr_pollset_poll(event_pollset, timeout_interval, &num, &out_pfd); 1456 if (rc != APR_SUCCESS) { 1457 if (APR_STATUS_IS_EINTR(rc)) { 1458 continue; 1459 } 1460 if (!APR_STATUS_IS_TIMEUP(rc)) { 1461 ap_log_error(APLOG_MARK, APLOG_CRIT, rc, ap_server_conf, 1462 "apr_pollset_poll failed. Attempting to " 1463 "shutdown process gracefully"); 1464 signal_threads(ST_GRACEFUL); 1465 } 1466 } 1467 If I understand correctly, apr_pollset_poll() is returning EBADFD in this code (specific to pollsets using solaris event ports): /apr/tags/1.4.6/poll/unix/port.c 372 ret = port_associate(pollset->p->port_fd, PORT_SOURCE_FD, 373 fd, get_event(ep->pfd.reqevents), ep); 374 if (ret < 0) { 375 rv = apr_get_netos_error(); 376 APR_RING_INSERT_TAIL(&(pollset->p->free_ring), ep, pfd_elem_t, link); 377 break; 378 } According to the man page for port_associate: EBADFD The source argument is of type PORT_SOURCE_FD and the object argument is not a valid file descriptor. We are running SmartOS, a variant of OpenSolaris/Illumos
We're also seeing this problem on Apache 2.4.9 on Solaris 10_u11; under load we're seeing apr_pollset_poll failed messages and the server is very slow to respond. After 30 seconds or so it recovers. We use log_server_status to log the server status to a file, and when this happens we can actually see requests to /server-status failing: 110500:90:185:136912038:.722062 110600:93:182:136920497:.722775 110700:71:204:136926275:.723272 110800:105:170:136933289:.723871 110900:101:174:136941124:.724506 111000:-1:-1:-1:-1:IO::Socket::INET: connect: Connection timed out 111100:-1:-1:-1:-1:IO::Socket::INET: connect: Connection timed out 111200:43:207:136954348:.726364 111300:293:207:136960240:.725304 111400:87:213:136967664:.497808 111500:99:201:136974792:.49857