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nsq v0.3.0 Release Notes

Release Date: 2014-11-18 // over 9 years ago

  • ⬆️ Upgrading from 0.2.31: No backwards incompatible changes.

    🚀 This release includes a slew of bug fixes and few key feature additions.

    The biggest functional change is that nsqd no longer decrements its RDY count for clients. This means that client libraries no longer have to periodically re-send RDY. For some context, nsqd already provided back-pressure due to the fact that a client must respond to messages before receiving new ones. The decremented RDY count only made the implementation of the server and client more complex without additional benefit. Now the RDY command can be treated as an "on/off" 👀 switch. For details see #404 and the associated changes in nsqio/go-nsq#83 and nsqio/pynsq#98.

    The second biggest change (and oft-requested feature!) is #ephemeral topics. Their behavior mirrors that of channels. This feature is incredibly useful for situations where you're using topics to "route" messages to consumers (like RPC) or when a backlog of messages is undesirable.

    There are now scripts in the bench directory that automate the process of running a distributed benchmark. This is a work-in-progress, but it already provides a closer-to-production setup and therefore more accurate results. There's much work to do here!

    🛠 A whole bunch of bugs were fixed - notably all were 3rd-party contributions! Thanks!

    • #305 - #ephemeral topics
    • #404/#459 - don't decr RDY / send RDY before FIN/REQ
    • #472 - improve nsqd diskqueue sync strategies
    • #488 - ability to filter topics by regex in nsq_to_file (thanks @lxfontes)
    • #438 - distributed pub-sub benchmark scripts
    • #448 - better nsqd IOLoop logging (thanks @rexposadas)
    • #458 - switch to gpm for builds

    🐛 Bugs:

    • #493 - ensure all nsqd Notify() goroutines have exited prior to shutdown (thanks @allgeek)
    • #492 - ensure diskqueue syncs at end of benchmarks (thanks @Dieterbe)
    • #490 - de-flake TestPauseMetadata (thanks @allgeek)
    • #486 - require ports to be specified for daemons (thanks @jnewmano)
    • #482 - better bash in dist.sh (thanks @losinggeneration)
    • #480 - fix panic when nsqadmin checks stats for missing topic (thanks @jnewmano)
    • #469 - fix panic when misbehaving client sends corrupt command (thanks @prio)
    • #461 - fix panic when nsqd decodes corrupt message data (thanks @twmb)
    • #454/#455 - fix 32-bit atomic ops in nsq_to_nsq/nsq_to_http (thanks @leshik)
    • #451 - fix go get compatibility (thanks @adams-sarah)