Changelog

ChangeLog for 4.0.1 (devel)

Version 4.1.0 [DEVEL] (rgerhards), 2008-11-18

********************************* WARNING *********************************
This version has a slightly different on-disk format for message entries.
As a consequence, old queue files being read by this version may have
an invalid output timestamp, which could result to some malfunction inside
the output driver. It is recommended to drain queues with the previous
version before switching to this one.
********************************* WARNING *********************************
  • greatly enhanced performance when compared to v3.
  • added configuration directive “HUPisRestart” which enables to configure
    HUP to be either a full restart or “just” a leightweight way to
    close open files.

  • enhanced legacy syslog parser to detect year if part of the timestamp
    the format is based on what Cisco devices seem to emit.

  • added a setting “$OptimizeForUniprocessor” to enable users to turn off
    pthread_yield calls which are counter-productive on multiprocessor
    machines (but have been shown to be useful on uniprocessors)

  • reordered imudp processing. Message parsing is now done as part of main
    message queue worker processing (was part of the input thread)
    This should also improve performance, as potentially more work is
    done in parallel.

  • bugfix: compressed syslog messages could be slightly mis-uncompressed
    if the last byte of the compressed record was a NUL

  • added $UDPServerTimeRequery option which enables to work with
    less acurate timestamps in favor of performance. This enables querying
    of the time only every n-th time if imudp is running in the tight
    receive loop (aka receiving messsages at a high rate)

  • doc bugfix: queue doc had wrong parameter name for setting controlling
    worker thread shutdown period

  • restructured rsyslog.conf documentation
  • bugfix: memory leak in ompgsql
    Thanks to Ken for providing the patch

ChangeLog for 4.1.1 (devel)

Version 4.1.1 [DEVEL] (rgerhards), 2008-11-26

  • added $PrivDropToGroup, $PrivDropToUser, $PrivDropToGroupID,
    $PrivDropToUserID config directives to enable dropping privileges.
    This is an effort to provide a security enhancement. For the limits of this
    approach, see http://wiki.rsyslog.com/index.php/Security

  • re-enabled imklog to compile on FreeBSD (brought in from beta)

ChangeLog for 3.21.6 (devel)

Version 3.21.6 [DEVEL] (rgerhards), 2008-10-22

  • consolidated time calls during msg object creation, improves performance
    and consistency

  • bugfix: solved a segfault condition
  • bugfix: subsecond time properties generated by imfile, imklog and
    internal messages could be slightly inconsistent

  • added capability to support multiple module search pathes. Thank
    to Marius Tomaschewski for providing the patch.

  • bugfix: im3195 did no longer compile
  • merged-in fixes from stable and beta releases

ChangeLog for 3.19.12 (beta)

Version 3.19.12 [BETA] (rgerhards), 2008-10-16

  • bugfix: subseconds where not correctly extracted from a timestamp
    if that timestamp did not contain any subsecond information (the
    resulting string was garbagge but should have been “0”, what it
    now is).

  • increased maximum size of a configuration statement to 4K (was 1K)
  • imported all fixes from the stable branch (quite a lot)

ChangeLog for 3.18.5 (v3-stable)

Version 3.18.5 (rgerhards), 2008-10-09

  • bugfix: imudp input module could cause segfault on HUP
    It did not properly de-init a variable acting as a linked list head.
    That resulted in trying to access freed memory blocks after the HUP.

  • bugfix: rsyslogd could hang on HUP
    because getnameinfo() is not cancel-safe, but was not guarded against
    being cancelled. pthread_cancel() is routinely being called during
    HUP processing.

  • bugfix[minor]: if queue size reached light_delay mark, enqueuing
    could potentially be blocked for a longer period of time, which
    was not the behaviour desired.

  • doc bugfix: $ActionExecOnlyWhenPreviousIsSuspended was still misspelled
    as $…OnlyIfPrev… in some parts of the documentation. Thanks to
    Lorenzo M. Catucci for reporting this bug.

  • added doc on malformed messages, cause and how to work-around, to the
    doc set

  • added doc on how to build from source repository

ChangeLog for 3.21.5 (devel)

Version 3.21.5 [DEVEL] (rgerhards), 2008-09-30

  • performance optimization: unnecessary time() calls during message
    parsing removed – thanks to David Lang for his excellent performance
    analysis

  • added new capability to property replacer: multiple immediately
    successive field delimiters are treated as a single one.
    Thanks to Zhuang Yuyao for the patch.

  • added message property “inputname”, which contains the name of the
    input (module) that generated it. Presence is depending on suport in
    each input module (else it is blank).

  • added system property “$myhostname”, which contains the name of the
    local host as it knows itself.

  • imported a number of fixes and enhancements from the stable and
    devel branches, including a fix to a potential segfault on HUP
    when using UDP listners

  • re-enabled gcc builtin atomic operations and added a proper
    ./configure check

  • bugfix: potential race condition when adding messages to queue
    There was a wrong order of mutex lock operations. It is hard to
    believe that really caused problems, but in theory it could and with
    threading we often see that theory becomes practice if something is only
    used long enough on a fast enough machine with enough CPUs ;)

  • cleaned up internal debug system code and made it behave better
    in regard to multi-threading

ChangeLog for 3.18.4 (v3-stable)

Version 3.18.4 (rgerhards), 2008-09-18

  • bugfix: order-of magnitude issue with base-10 size definitions
    in config file parser. Could lead to invalid sizes, constraints
    etc for e.g. queue files and any other object whose size was specified
    in base-10 entities. Did not apply to binary entities. Thanks to
    RB for finding this bug and providing a patch.

  • bugfix: action was not called when system time was set backwards
    (until the previous time was reached again). There are still some
    side-effects when time is rolled back (A time rollback is really a bad
    thing to do, ideally the OS should issue pseudo time (like NetWare did)
    when the user tries to roll back time). Thanks to varmojfekoj for this
    patch.

  • doc bugfix: rsyslog.conf man page improved and minor nit fixed
    thanks to Lukas Kuklinek for the patch.

  • bugfix: error code -2025 was used for two different errors. queue full
    is now -2074 and -2025 is unique again. (did cause no real problem
    except for troubleshooting)

  • bugfix: default discard severity was incorrectly set to 4, which lead
    to discard-on-queue-full to be enabled by default. That could cause
    message loss where non was expected. The default has now been changed
    to the correct value of 8, which disables the functionality. This
    problem applied both to the main message queue and the action queues.
    Thanks to Raoul Bhatia for pointing out this problem.

  • bugfix: option value for legacy -a option could not be specified,
    resulting in strange operations. Thanks to Marius Tomaschewski
    for the patch.

  • bugfix: colon after date should be ignored, but was not. This has
    now been corrected. Required change to the internal ParseTIMESTAMP3164()
    interface.

Changelog for 3.21.4 (devel)

Version 3.21.4 [DEVEL] (rgerhards), 2008-09-04

  • removed compile time fixed message size limit (was 2K), limit can now
    be set via $MaxMessageSize global config directive (finally gotten rid
    of MAXLINE ;))

  • enhanced doc for $ActionExecOnlyEveryNthTimeTimeout
  • integrated a number of patches from 3.18.4, namely
    • bugfix: order-of magnitude issue with base-10 size definitions
      in config file parser. Could lead to invalid sizes, constraints
      etc for e.g. queue files and any other object whose size was specified
      in base-10 entities. Did not apply to binary entities. Thanks to
      RB for finding this bug and providing a patch.

    • bugfix: action was not called when system time was set backwards
      (until the previous time was reached again). There are still some
      side-effects when time is rolled back (A time rollback is really a bad
      thing to do, ideally the OS should issue pseudo time (like NetWare did)
      when the user tries to roll back time). Thanks to varmojfekoj for this
      patch.

    • doc bugfix: rsyslog.conf man page improved and minor nit fixed
      thanks to Lukas Kuklinek for the patch.
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