Bug 62719 - MPm Event Error scoreboard is full, not at MaxRequestWorkers
Summary: MPm Event Error scoreboard is full, not at MaxRequestWorkers
Status: RESOLVED WONTFIX
Alias: None
Product: Apache httpd-2
Classification: Unclassified
Component: mpm_event (show other bugs)
Version: 2.4.18
Hardware: PC Linux
: P2 critical (vote)
Target Milestone: ---
Assignee: Apache HTTPD Bugs Mailing List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-09-14 06:00 UTC by Nirav Gandhi
Modified: 2018-09-14 14:27 UTC (History)
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Description Nirav Gandhi 2018-09-14 06:00:55 UTC
Error in Apache log:

[Thu Sep 13 20:41:21.623616 2018] [mpm_event:error] [pid 20210:tid 139885312763776] AH00485: scoreboard is full, not at MaxRequestWorkers


Current Config File : 

Server version: Apache/2.4.18 (Ubuntu)
Server built:   2018-06-07T19:43:03
Server's Module Magic Number: 20120211:52
Server loaded:  APR 1.6.2, APR-UTIL 1.5.4
Compiled using: APR 1.5.2, APR-UTIL 1.5.4
Architecture:   64-bit
Server MPM:     event
  threaded:     yes (fixed thread count)
    forked:     yes (variable process count)
Server compiled with....
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_SYSVSEM_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=256
 -D HTTPD_ROOT="/etc/apache2"
 -D SUEXEC_BIN="/usr/lib/apache2/suexec"
 -D DEFAULT_PIDLOG="/var/run/apache2.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="mime.types"
 -D SERVER_CONFIG_FILE="apache2.conf"

Current Mpm Config :

<IfModule mpm_event_module>
        StartServers                     2
        MinSpareThreads          75
        MaxSpareThreads          225
        ThreadLimit                      64
        ThreadsPerChild          25
        MaxRequestWorkers         300
        MaxConnectionsPerChild   0
</IfModule>

After going over https this issue is occured. Can you please guide me over that. It's very critical for me Because issue occurred in Live Environment.
Comment 1 Eric Covener 2018-09-14 14:27:57 UTC
What has changed here? What modules are used?

2.4.18 is ancient, but your server is recently rebuilt. Presumably someone is
pulling in patches. I would have whoever built this look at improvements related to e.g. bugzilla #61551