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.
Bug 969210 - make listen backlog size configurable
Summary: make listen backlog size configurable
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: 389-ds-base
Version: 6.4
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Rich Megginson
QA Contact: Sankar Ramalingam
URL:
Whiteboard:
Depends On: 995507
Blocks: 974251
TreeView+ depends on / blocked
 
Reported: 2013-05-30 22:02 UTC by Nathan Kinder
Modified: 2020-09-13 20:34 UTC (History)
4 users (show)

Fixed In Version: 389-ds-base-1.2.11.15-22.el6
Doc Type: Bug Fix
Doc Text:
Cause: The listen backlog size (the backlog parameter to the listen(2) function) is hard coded to be 128. Consequence: Under certain conditions where the server may be processing hundreds of simultaneous connection requests, the server will drop connection requests due to the backlog being exceeded. Fix: Add a new configuration attribute - nsslapd-listen-backlog-size - that will allow the backlog size to be changed. Result: Server can queue up to the system maximum of tcp connections.
Clone Of:
: 974251 (view as bug list)
Environment:
Last Closed: 2013-11-21 21:08:25 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Github 389ds 389-ds-base issues 714 0 None closed make listen backlog size configurable 2020-10-14 22:59:03 UTC
Red Hat Product Errata RHBA-2013:1653 0 normal SHIPPED_LIVE 389-ds-base bug fix update 2013-11-20 21:53:19 UTC

Description Nathan Kinder 2013-05-30 22:02:53 UTC
This bug is created as a clone of upstream ticket:
https://fedorahosted.org/389/ticket/47377

The listen backlog size is hardcoded at 128 - it should be configurable

Comment 1 Sankar Ramalingam 2013-05-31 00:47:07 UTC
I don't see any information about this configuration parameter either DS admin guide or in the upstream ticket.

Comment 2 Nathan Kinder 2013-05-31 15:13:48 UTC
(In reply to Sankar Ramalingam from comment #1)
> I don't see any information about this configuration parameter either DS
> admin guide or in the upstream ticket.

A documentation bug will need to be opened for the Config/Command Guide.  Details on the listen queue backlog can be found in the manpage for listen (man 2 listen):

       int listen(int sockfd, int backlog);

  DESCRIPTION
       listen()  marks  the  socket referred to by sockfd as a passive socket,
       that is, as a socket that will be used to  accept  incoming  connection
       requests using accept(2).

       The  sockfd  argument  is  a file descriptor that refers to a socket of
       type SOCK_STREAM or SOCK_SEQPACKET.

       The backlog argument defines the maximum length to which the  queue  of
       pending  connections  for  sockfd  may  grow.   If a connection request
       arrives when the queue is full, the client may receive an error with an
       indication  of  ECONNREFUSED  or,  if  the underlying protocol supports
       retransmission, the request may be ignored so that a later reattempt at
       connection succeeds.

Comment 10 errata-xmlrpc 2013-11-21 21:08:25 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-1653.html


Note You need to log in before you can comment on or make changes to this bug.