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0MQ version 2.1.3 (Stable), released on 2011/03/21
Bug fixes
* Fix to PUSH sockets, which would sometimes deliver tail frames of a
multipart message to new subscribers (Martin Sustrik).
* Fix to PUB sockets, which would sometimes deliver tail frames of a
multipart message to new subscribers (Martin Sustrik).
* Re-add PGM_TXW_MAX_RTE in order to have rate limiting on pgm transport
over OpenPGM (Steven McCoy).
* Windows build was broken due to EPROTONOSUPPORT not being defined. This
has now been fixed (Martin Sustrik).
* Various fixes to make OpenVMS port work (Brett Cameron).
* Corrected Reference Manual to note that ZMQ_LINGER socket option may be
set at any time, not just before connecting/binding (Pieter Hintjens).
* Fix to C++ binding to properly close sockets (Guido Goldstein).
* Removed obsolete assert from pgm_socket.cpp (Martin Sustrik).
* Removed stand-alone devices (/devices subdirectory) from distribution.
These undocumented programs remain available in older packages (Pieter
* OpenPGM default rate raised to 40mbps by default (Steven McCoy).
* ZMQ_DEALER and ZMQ_ROUTER macros provided to ease upgrade to 0MQ/3.0.
These are scheduled to replace ZMQ_XREQ and ZMQ_XREP (Pieter Hintjens).
* Added man page for zmq_device(3) which was hereto undocumented (Pieter
* Removed zmq_queue(3), zmq_forwarder(3), zmq_streamer(3) man pages
(Pieter Hintjens).
OpenPGM Integration
* Upgraded OpenPGM to version 5.1.114 (Steven McCoy, Mikko Koppanen).
* Build system now calls OpenPGM build process directly, allowing easier
future upgrades of OpenPGM (Mikko Koppanen).
* Build system allows configuration with arbitrary versions of OpenPGM
(./configure --with-pgm=libpgm-x.y.z) (Mikko Koppanen).
* OpenPGM uses new PGM_ODATA_MAX_RTE controlling original data instead of
PGM_TXW_MAX_RTE covering entire channel (Steven McCoy).
* 0MQ builds properly on FreeBSD (Mikko Koppanen).
0MQ version 2.1.2 (rc2), released on 2011/03/06
Bug fixes
* 0MQ now correctly handles durable inproc sockets; previously it ignored
explicit identities on inproc sockets.
* Various memory leaks were fixed.
* OpenPGM sender/receiver creation fixed.
0MQ version 2.1.1 (rc1), released on 2011/02/23
New functionality
* New socket option ZMQ_RECONNECT_IVL_MAX added, allows for exponential
back-off strategy when reconnecting.
* New socket option ZMQ_RECOVERY_IVL_MSEC added, as a fine-grained
counterpart to ZMQ_RECOVERY_IVL (for multicast transports).
* If memory is exhausted, 0MQ warns with an explicit message before
aborting the process.
Bug fixes
* 0MQ no longer asserts in mailbox.cpp when multiple peers connect with
the same identity.
* 0MQ no longer asserts when rejecting an oversized message.
* 0MQ no longer asserts in pipe.cpp when the swap fills up.
* zmq_poll now works correctly with an empty poll set.
* Many more.
* 0MQ now builds correctly on CentOS, Debian 6, and SunOS/gcc3.
* Added WithOpenPGM configuration into MSVC builds.
Known issues
* OpenPGM integration is still not fully stable.
0MQ version 2.1.0 (Beta), released on 2010/12/01
New functionality
* New semantics for zmq_close () and zmq_term () ensure that all messages
are sent before the application terminates. This behaviour may be
modified using the new ZMQ_LINGER socket option; for further details
refer to the reference manual.
* The new socket options ZMQ_FD and ZMQ_EVENTS provide a way to integrate
0MQ sockets into existing poll/event loops.
* Sockets may now be migrated between OS threads, as long as the
application ensures that a full memory barrier is issued.
* The 0MQ ABI exported by has been formalised; DSO symbol
visibility is used on supported platforms to ensure that only public ABI
symbols are exported. The library ABI version has been set to 1.0.0 for
this release.
* OpenPGM has been updated to version 5.0.92. This version no longer
depends on GLIB, and integration with 0MQ should be much improved.
* zmq_poll() now honors timeouts precisely, and no longer returns if no
events are signaled.
* Blocking calls now return EINTR if interrupted by the delivery of a
signal; this also means that language bindings which previously had
problems with handling SIGINT/^C should now work correctly.
* The ZMQ_TYPE socket option was added; this allows retrieval of the socket
type after creation.
* Added a ZMQ_VERSION macro to zmq.h for compile-time API version
* The ZMQ_RECONNECT_IVL and ZMQ_BACKLOG socket options have been added.
Bug fixes
* Forwarder and streamer devices now handle multi-part messages correctly.
* 0MQ no longer asserts when malformed data is received on the wire.
* 0MQ internal timers now work correctly if the TSC jumps backwards.
* The internal signalling functionality (mailbox) has been improved
to automatically resize socket buffers on POSIX systems.
* Many more.
* 0MQ now builds correctly with many more non-GCC compilers (Sun Studio,
Intel ICC, CLang).
* AIX and HP-UX builds should work now.
* FD_SETSIZE has been set to 1024 by default for MSVC builds.
* Windows builds using GCC (MinGW) now work out of the box.
* A simple framework for regression tests has been added, along with a few
basic self-tests. The tests can be run using "make check".