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@mreiferson mreiferson released this 02 Jul 19:40
· 1539 commits to master since this release
v0.2.20
871baaf

Upgrading from 0.2.19: there are no backward incompatible changes in this release.

This release adds a couple of convenient features (such as adding the ability to empty a topic) and continues our work to reduce garbage produced at runtime to relieve GC pressure in the Go runtime.

nsqd now has two new flags to control the max value clients can use to set their heartbeat interval as well as adjust a clients maximum RDY count. This is all set/communicated via IDENTIFY.

nsqadmin now displays nsqd -> nsqlookupd connections in the "nodes" view. This is useful for visualizing how the topology is connected as well as situations where --broadcast-address is being used incorrectly.

nsq_to_http now has a "host pool" mode where upstream state will be adjusted based on successful/failed requests and for failures, upstreams will be exponentially backed off. This is an incredibly useful routing mode.

As for bugs, we fixed an issue where "fatal" client errors were not actually being treated as fatal. Under certain conditions deleting a topic would not clean up all of its files on disk. There was a reported issue where the --data-path was not writable by the process and this was only discovered after message flow began. We added a writability check at startup to improve feedback. Finally. deferred_count was being sent as a counter value to statsd, it should be a gauge.

New Features / Enhancements:

  • #197 - nsqadmin nodes list improvements (show nsqd -> lookupd conns)
  • #192 - add golang runtime version to daemon version output
  • #183 - ability to empty a topic
  • #176 - optimizations to reduce garbage, copying, locking
  • #184 - add table headers to nsqadmin channel view (thanks @elubow)
  • #174/#186 - nsq_to_http hostpool mode and backoff control
  • #173/#187 - nsq_stat utility for command line introspection
  • #175 - add nsqd --max-rdy-count configuration option
  • #178 - add nsqd --max-heartbeat-interval configuration option

Bug Fixes:

  • #198 - fix fatal errors not actually being fatal
  • #195 - fix delete topic does not delete all diskqueue files
  • #193 - fix data race in channel requeue
  • #185 - ensure that --data-path is writable on startup
  • #182 - fix topic deletion ordering to prevent race conditions with lookupd/diskqueue
  • #179 - deferred_count as gauge for statsd
  • #173/#188/#191 - fix nsqadmin counter template error; fix nsqadmin displaying negative rates
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