rethinkdb/rethinkdb v2.2.0

2.2.0 — Modern Times

on GitHub

RethinkDB 2.2 introduces atomic changefeeds. Atomic changefeeds include existing values
from the database into the changefeed result, and then atomically transition to streaming
updates.

Atomic changefeeds make building realtime apps dramatically easier: you can use
a single code path to populate your application with initial data, and continue receiving
realtime data updates.

This release also includes numerous performance and scalability improvements designed to
help RethinkDB clusters scale to larger sizes while using fewer resources.

Read the blog post for more details.

Compatibility

Data files from RethinkDB version 1.16 onward will be automatically migrated.
As with any major release, back up your data files before performing the upgrade.

If you're upgrading from RethinkDB 1.14.x or 1.15.x, you need to migrate your secondary
indexes first. You can do this by following these steps:

• Install RethinkDB 2.0.5.
• Update the RethinkDB Python driver (sudo pip install 'rethinkdb<2.1.0').
• Rebuild your indexes with rethinkdb index-rebuild.

Afterwards, you can install RethinkDB 2.2 and start it on the existing data files.

If you're upgrading directly from RethinkDB 1.13 or earlier, you will need to manually
upgrade using rethinkdb dump.

API-breaking changes

• Changefeeds on .orderBy.limit as well as .get queries previously provided
  initial results by default. You now need to include the optional argument
  includeInitial: true to .changes to achieve the same behavior.
• The deprecated protocol buffer driver protocol is no longer supported. The newer JSON
  protocol is now the only supported driver protocol. Older drivers using the deprecated
  protocol no longer work with RethinkDB 2.2.0. See the drivers list for
  up-to-date drivers.
  • If you're using Java, please note that at the time of writing, existing community
    drivers have not been updated to use the newer JSON protocol. However, an
    official Java driver is in active development and will be available
    soon.
• Certain argument errors that used to throw ReqlDriverError exceptions now throw
  ReqlCompileError exceptions. See #4669 for a full list of changes.

Supported distributions

RethinkDB 2.2.0 now comes with official packages for Ubuntu 15.10 (Wily Werewolf) and
CentOS 7.

We no longer provide packages for Ubuntu 10.04 (Lucid Lynx), which has reached end of
life.

New features

• Added full support for atomic changefeeds through the include_initial optarg (#3579)
• Added a values command to obtain the values of an object as an array (#2945)
• Added a conn.server command to identify the server for a given connection (#3934)
• Extended r.uuid to accept a string and work as a hash function (#4636)

Improvements

• Server
  • Improved the scalability of range queries on sharded tables (#4343)
  • Improved the performance of between queries on secondary indexes (#4862)
  • Reduced the memory overhead for large data sets (#1951)
  • Redesigned the internal representation of queries to improve efficiency (#4601)
  • Removed the deprecated protocol buffer driver protocol (#4601)
  • Improved the construction of secondary indexes to make them resumable and to reduce
    their impact on any production workload (#4959)
  • Improved the performance when using getAll with a secondary index in some edge cases
    (#4948)
  • Removed the limit of 1024 concurrent changefeeds on a single connection (#4732)
  • Implemented automatically growing coroutine stacks to avoid stack overflows (#4462)
  • Optimized the deserialization of network messages to avoid an extra copy (#3734)
  • Added a raft_leader field to a table's status to expose its current Raft leader
    (#4902)
  • Made the handling of invalid lines in the 'logs' system table more robust (#4929)
• ReQL
  • indexStatus now exposes the secondary index function (#3231)
  • Added an optarg called changefeed_queue_size to specify how many changes the server
    should buffer on a changefeed before generating an error (#3607)
  • Extended branch to accept an arbitrary number of conditions and values (#3199)
  • Strings can now contain null characters (except in primary keys) (#3163)
  • Streams can now be coerced directly to an object (#2802)
  • Made coerceTo('BOOL') consistent with branch (#3133)
  • Changefeeds on filter and map queries involving geospatial terms are now allowed
    (#4063)
  • Extended or and and to accept zero arguments (#4132)
• Web UI
  • The Data Explorer now allows executing only parts of a query be selecting them (#4814)
• All drivers
  • Improved the consistency of ReQL error types by throwing ReqlCompileError rather
    than ReqlDriverError for certain errors (#4669)
• JavaScript driver
  • Added an eachAsync method on cursors that behaves like each but also returns a
    promise (#4784)
• Python driver
  • Implemented an API to override the default JSON encoder and decoder (#4825, #4818)

Bug fixes

• Server
  • Fixed a segmentation fault that could happen when disconnecting a server while
    having open changefeeds (#4972)
  • Updated the description of the --server-name parameter in rethinkdb --help (#4739)
  • Fixed a crash with the message "Guarantee failed: [ts->tv_nsec >= 0 &&
    ts->tv_nsec < (1000LL * (1000LL * 1000LL))] " (#4931)
  • Fixed a problem where backfill jobs didn't get removed from the 'jobs' table (#4923)
  • Fixed a memory corruption that could trigger a segmentation fault during
    getIntersecting queries (#4937)
  • Fixed an issue that could stop data files from RethinkDB 1.13 from migrating properly
    (#4991)
  • Fixed a "Guarantee failed: [pair.second] key for entry_t already exists" crash when
    rapidly reconnecting servers (#4968)
  • Fixed an "Uncaught exception of type interrupted_exc_t" crash (#4977)
  • Added a check to catch r.minval and r.maxval values when writing to the
    '_debug_scratch' system table (#4032)
• ReQL
  • Fixed the error message that's generated when passing in a function with the wrong
    arity (#4189)
  • Fixed a regression that caused r.asc("test") to not fail as it should (#4951)
• JavaScript driver
  • Object keys in toString are now properly quoted (#4997)

Contributors

Many thanks to external contributors from the RethinkDB community for helping
us ship RethinkDB 2.2. In no particular order:

• Peter Hollows (@captainpete)
• Zhenchao Li (@fantasticsid)
• Marshall Cottrell (@marshall007)
• Adam Grandquist (@grandquista)
• Ville Immonen (@fson)
• Matt Broadstone (@mbroadst)
• Pritam Baral (@pritambaral)
• Elian Gidoni (@eliangidoni)
• Mike Mintz (@mikemintz)
• Daniel Compton (@danielcompton)
• Vinh Quốc Nguyễn (@kureikain)
• Shayne Hodge (@schodge)
• Alexander Zeillinger (@alexanderzeillinger)
• Ben Gesoff (@bengesoff)
• Dmitriy Lazarev (@wKich)
• Chris Gaudreau (@clessg)
• Paweł Świątkowski (@katafrakt)
• Wang Zuo (@wangzuo)
• Chris Goller (@goller)
• Mateus Craveiro (@mccraveiro)