RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Description of problem:

Scoreboard full error with Event MPM

Customer is seeing the following errors:
[Thu May 11 11:11:50.839899 2017] [mpm_event:error] [pid 45842:tid 140329112012928] AH00485: scoreboard is full, not at MaxRequestWorkers
[Thu May 11 11:11:51.841006 2017] [mpm_event:error] [pid 45842:tid 140329112012928] AH00485: scoreboard is full, not at MaxRequestWorkers

Backport:
https://bz.apache.org/bugzilla/show_bug.cgi?id=53555

Version-Release number of selected component (if applicable):

httpd-2.4.6-45.el7.x86_64  

   Customer does not see the issue when using Worker MPM

*** This bug has been marked as a duplicate of bug 1425505 ***

bug 1425505 is still not public. Is the recommended work-around still to switch from mpm event to mpm worker? Perhaps I don't understand the issue fully, but why isn't the fix from Apache backported?

We recommend switching to the worker MPM, or to use the httpd24 collection from Red Hat Software Collections (currently at version 2.4.27) if you are hitting this issue with event in RHEL7 httpd.