In a multithreaded program, POSIX signals are sent to an arbitrary
thread that hasn't blocked them via sigprocmask().  This means that
when it matters which thread gets the signal -- for instance, if
sigwait() is being used to serialize signals -- the program must ensure
that every other thread has blocked the signal in question.  Otherwise,
the signal might be delivered to the wrong thread and lost.

  liblog4cxx automatically starts threads sometimes, and it doesn't
adjust their thread masks.  It really should block out every signal
that it isn't interested in itself, so that programs using sigwait()
can also use log4cxx.

  See also #547212.

  Daniel

Upstream is currently in preparation for a new release (0.12.1) where this
problem is fixed.

This is the changeset to fix the problem:
https://github.com/apache/logging-log4cxx/pull/70

I'll package it once upstream has released 0.12.1.

Control: reassign -1 liblog4cxx11
Control: affects -1 liblog4cxx10
Control: affects -1 liblog4cxx12

We believe that the bug you reported is fixed in the latest version of
log4cxx, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 548074@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Tobias Frost <tobi@debian.org> (supplier of updated log4cxx package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Wed, 25 May 2022 12:37:54 +0200
Source: log4cxx
Binary: liblog4cxx-dev liblog4cxx-doc liblog4cxx13 liblog4cxx13-dbgsym
Architecture: source amd64 all
Version: 0.13.0-1
Distribution: experimental
Urgency: medium
Maintainer: Tobias Frost <tobi@debian.org>
Changed-By: Tobias Frost <tobi@debian.org>
Description:
 liblog4cxx-dev - Logging library for C++ (development files)
 liblog4cxx-doc - Documentation for log4cxx
 liblog4cxx13 - Logging library for C++
Closes: 548074
Changes:
 log4cxx (0.13.0-1) experimental; urgency=medium
 .
   * New upstream release, fixing an old threading/signal bug (Closes: #548074).
   * Upload to experimental for the library transition.
   * Adapt packaing for SONAME bump to 13.
   * Removing all patches, as they have been applied upstream.
   * Update d/copyright years.
   * Update patch required for autopkgtest.
   * Disable inetaddresstestcase -- needs network.
   * Update lintian overrides.
   * Disable flaky tests during build.
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