[PSA] Redis 6.2 RC2 is out

[re...@redis.io]

Dear everybody,

The 2nd release candidate of Redis 6.2 is out. This should be the
penultimate RC and here're its notes:

Upgrade urgency LOW: This is the second Release Candidate of Redis 6.2.

IMPORTANT: If you're running Redis on ARM64 or a big-endian system,
upgrade may
have significant implications. Please be sure to read the notes below.

Here is a comprehensive list of changes in this release compared to 6.2
RC1,
each one includes the PR number that added it, so you can get more
details
at https://github.com/redis/redis/pull/<number>

New commands / args:
* Add the REV, BYLEX and BYSCORE arguments to ZRANGE, and the
ZRANGESTORE command (#7844)
* Add the XAUTOCLAIM command (#7973)
* Add the MINID trimming strategy and the LIMIT argument to XADD and
XTRIM (#8169)
* Add the ANY argument to GEOSEARCH and GEORADIUS (#8259)
* Add the CH, NX, XX arguments to GEOADD (#8227)
* Add the COUNT argument to LPOP and RPOP (#8179)
* Add the WRITE argument to CLIENT PAUSE for pausing write commands
exclusively (#8170)
* Change the proto-ver argument of HELLO to optional (#7377)
* Add the CLIENT TRACKINGINFO subcommand (#7309)

Command behavior changes:
* CLIENT TRACKING yields an error when given overlapping BCAST prefixes
(#8176)
* SWAPDB invalidates WATCHed keys (#8239)
* SORT command behaves differently when used on a writable replica
(#8283)

Other behavior changes:
* Avoid propagating MULTI/EXEC for read-only transactions (#8216)
* Remove the read-only flag from TIME, ECHO, ROLE, LASTSAVE (#8216)
* Fix the command flags of PFDEBUG (#8222)
* Tracking clients will no longer receive unnecessary key invalidation
messages after FLUSHDB (#8039)
* Sentinel: Fix missing updates to the config file after SENTINEL SET
command (#8229)

Bug fixes with compatibility implications (bugs introduced in Redis
6.0):
* Fix RDB CRC64 checksum on big-endian systems (#8270)
If you're using big-endian please consider the compatibility
implications with
RESTORE, replication and persistence.
* Fix wrong order of key/value in Lua's map response (#8266)
If your scripts use redis.setresp() or return a map (new in Redis
6.0), please
consider the implications.

Bug fixes that are only applicable to previous releases of Redis 6.2:
* Resolve rare assertions in active defragmentation while loading
(#8284, #8281)

Bug fixes:
* Fix the selection of a random element from large hash tables (#8133)
* Fix an issue where a forked process deletes the parent's pidfile
(#8231)
* Fix crashes when enabling io-threads-do-reads (#8230)
* Fix a crash in redis-cli after executing cluster backup (#8267)
* Fix redis-benchmark to use an IP address for the first cluster node
(#8154)
* Fix saving of strings larger than 2GB into RDB files (#8306)

Additional improvements:
* Improve replication handshake time (#8214)
* Release client tracking table memory asynchronously in cases where the
DB is also freed asynchronously (#8039)
* Avoid wasteful transient memory allocation in certain cases (#8286,
#5954)
* Handle binary string values by the 'requirepass' and 'masterauth'
configs (#8200)

Platform and deployment-related changes:
* Install redis-check-rdb and redis-check-aof as symlinks to
redis-server (#5745)
* Add a check for an ARM64 Linux kernel bug (#8224)
Due to the potential severity of this issue, Redis will refuse to run
on
affected platforms by default.

Info fields and introspection changes:
* Add the errorstats section to the INFO command (#8217)
* Add the failed_calls and rejected_calls fields INFO's commandstats
section (#8217)
* Report child copy-on-write metrics continuously (#8264)

Module API changes:
* Add the RedisModule_SendChildCOWInfo API (#8264)
* Add the may-replicate command flag (#8170)

Cheers,
The Redis team