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<title>rsyslog bugs and annoyances</title>
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<h1>rsyslog bugs and annoyances</h1>
<p><b>This page lists the known bugs rsyslog has to offer.</b> Please note that
we also have a
<a href="http://sourceforge.net/tracker/?atid=696552&group_id=123448&func=browse">
bug tracker at sourceforge.net</a>. This list here contains more architectural
things while the bug tracker most often lists things that you will actually
experience. Please be sure to visit the bug tracker in addition to this list
here.</p>
<p>This list has last been updated on 2007-06-28 by
<a href="http://www.adiscon.com/en/people/rainer-gerhards.php">Rainer Gerhards</a>.</p>
<h1>rsyslogd</h1>
<h2>AllowedSender and IPv6</h2>
<p>AllowedSenders currently can be used with IPv4, only. IPv6 senders are always
allowed. If you need access control for IPv6, use iptables. AllowedSender
support for IPv6 will most probably be added. Please note that you can also
disable IPv6 support by specifying -4 on the command line.</p>
<h2>REPEATED LOG LINES</h2>
<p>If multiple log lines with the exact same content are received,
the duplicates are NOT suppressed. This is done by sysklogd
in all cases. We plan to add this as an optional feature,
but as of now every line is logged.</p>
<h2>EQUALLY-NAMED TEMPLATES</h2>
<p>If multiple templates with the SAME name are created, all but the
first definition is IGNORED. So you can NOT (yet) replace a
template definition. I also strongly doubt I will ever support this, because
it does not make an awful lot of sense (after all, why not use two template
names...).</p>
<h2>MEMORY LEAK ON HUPING</h2>
<p>Currently, the template memory is NOT freed when SIGHUP is received.
This causes a small memory leak on each HUP. Will be fixed soon and
should not cause real trouble unless you HUP syslogd quite frequently.</p>
<h2>WALLMSG FORMAT (* selector)
</h2>
<p>This format is actually not 100% compatible with stock syslogd - the
date is missing. Will be fixed soon and can also be fixed just via
the proper template. Anyone up for this? ;)</p>
<h2>SIGPIPE HANDLING</h2>
<p>Currently, SIGPIPE is ignored. This is necessary to handle broken TCP
connections. We should further look into this issue and see which other
ways exist to handle the situation.</p>
<h2>MULTIPLE INSTANCES</h2>
<p>If multiple instances are running on a single machine, the one with
the -r switch must start first. Also, UDP-based syslog forwarding between the
instances does not work. Use TCP instead.</p>
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