Bug 969210
Summary: | make listen backlog size configurable | |||
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Product: | Red Hat Enterprise Linux 6 | Reporter: | Nathan Kinder <nkinder> | |
Component: | 389-ds-base | Assignee: | Rich Megginson <rmeggins> | |
Status: | CLOSED ERRATA | QA Contact: | Sankar Ramalingam <sramling> | |
Severity: | unspecified | Docs Contact: | ||
Priority: | unspecified | |||
Version: | 6.4 | CC: | jgalipea, lnovich, mkubik, nhosoi | |
Target Milestone: | rc | |||
Target Release: | --- | |||
Hardware: | Unspecified | |||
OS: | Unspecified | |||
Whiteboard: | ||||
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.
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Story Points: | --- | |
Clone Of: | ||||
: | 974251 (view as bug list) | Environment: | ||
Last Closed: | 2013-11-21 21:08:25 UTC | Type: | --- | |
Regression: | --- | Mount Type: | --- | |
Documentation: | --- | CRM: | ||
Verified Versions: | Category: | --- | ||
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
Cloudforms Team: | --- | Target Upstream Version: | ||
Embargoed: | ||||
Bug Depends On: | 995507 | |||
Bug Blocks: | 974251 |
Description
Nathan Kinder
2013-05-30 22:02:53 UTC
I don't see any information about this configuration parameter either DS admin guide or in the upstream ticket. (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. 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 |