Red Hat ENTERPRISE LINUX 5.5 - S 2010, Руководство пользователя

Страница: 53 / 470

RHBA-2010:0223: bug fix update
43
A dhcp update that fixes one memory leak is now available.
The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP
network to get their own network configuration information, including an IP address, a subnet mask,
and a broadcast address. The dhcp package provides a relay agent and ISC DHCP service required
to enable and administer DHCP on a network.
This update applies the following updates:
* a memory leak in the load_balance_mine() function caused dhcpd, the dhcp server, to leak
approximately 20-30 octets per DHCPDISCOVER packet when the server was configured for
failover and failover was in a normal state. This particular leak has been closed with this update.
(
BZ#552211
297
)
Note: depending on the specific DHCP setup on a given system, other memory leaks may still present.
Please file a separate bug if DHCP appears to leak memory after applying this update.
All dhcp users should to apply this update which closes this memory leak.
1.37.2. RHBA-2010:0223: bug fix update
A dhcp update that fixes bugs is now available.
DHCP (Dynamic Host Configuration Protocol) is a protocol which allows individual devices on an
IP network to get their own network configuration information (IP address, subnetmask, broadcast
address, etc.) from a DHCP server.
These updated packages address the following issues:
* When a system running a dhclient received a very short lease (e.g a few seconds), it would
constantly have to request a renewal of its lease. The system would spend so much time running
the dhclient-script every time it made a request that it would become almost unresponsive. A patch
has been added to the code, setting the minimum lease time to 60 seconds. By preventing very short
lease times, the server no longer becomes unresponsive from an overload of renewal requests.
(
BZ#498658
298
)
* When the $localClockFudge variable was empty, the /sbin/dhclient-script added an empty line to
the /etc/ntp.conf file when renewing the DHCP lease. This caused the diff command to fail when
there was no meaningful difference between the old and new files, thus restarting the NTP daemon
unnecessarily. This put useless noise in the log files that get picked up by logwatch. This update
provides a slight code change that configures the NTP daemon differently. The /etc/ntp.conf file now
only runs if there is a useful value in the $localClockFudge variable. (
BZ#532136
299
)
* A memory leak in the load_balance_mine() function caused 20-30 octets per DHCPDISCOVER
packet to be leaked when failover was in use and was in its normal state. This caused the
performance of the server to be significantly diminished. This update fixes the memory leak in the
load_balance_mine() function, allowing the server to perform correctly. (
BZ#534117
300
)
Note: depending on the specific DHCP setup on a given system, other memory leaks may still present.
Please file a separate bug if DHCP appears to leak memory after applying this update.
297
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=552211
298
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=498658
299
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=532136
300
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=534117