Redis 2.8.22.

00-RELEASENOTES

@@ -14,6 +14,54 @@ HIGH:     There is a critical bug that may affect a subset of users. Upgrade!
 CRITICAL: There is a critical bug affecting MOST USERS. Upgrade ASAP.
 --------------------------------------------------------------------------------
 
+--[ Redis 2.8.22 ] Release date: 8 Sep 2015
+
+Upgrade urgency: HIGH for Redis and Sentinel. However note that in order to
+                 fix certain replication bugs, the replication internals were
+                 modified in a very heavy way. So while this release is
+                 conceptually saner, it may contain regressions. For this
+                 reason, before the release, QA activities were performed by
+                 me (antirez) and Redis Labs and no evident bug was found.
+
+* [FIX] A number of bugs related to replication PSYNC and the (yet experimental)
+        diskless replication feature were fixed. The bugs could lead to
+        inconsistency between masters and slaves. (Salvatore Sanfilippo, Oran
+        Agra fixed the issue found by Yuval Inbar)
+* [FIX] A replication bug in the context of PSYNC partial resynchonization was
+        found and fixed. This bug happens even when diskless replication is off
+        in the case different slaves connect at different times while the master
+        is creating an RDB file, and later a partial resynchronization is
+        attempted by a slave that connected not as the first one. (Salvatore
+        Sanfilippo, Oran Agra)
+* [FIX] Chained replication and PSYNC interactions leading to potential stale
+        chained slaves data set, see issue #2694. (Salvatore Sanfilippo fixed
+        an issue reported by "GeorgeBJ" user at Github)
+* [FIX] redis-cli --scan iteration fixed when returned cursor overflows
+        32 bit signed integer. (Ofir Luzon, Yuval Inbar)
+* [FIX] Sentinel: fixed a bug during the master switch process, where for a
+        failed conditional check, the new configuration is rewritten, during
+        a small window of time, in a corrupted way where the master is
+        also reported to be one of the slaves. This bug is rare to trigger
+        but apparently it happens in the wild, and the effect is to see
+        a replication loop where the master will try to replicate with itself.
+        A detailed explanation of the bug and its effects can be found in
+        the commit message here: https://github.com/antirez/redis/commit/c20218eb5770b2cafb12bc7092313b8358fedc0a.
+        The bug was found by Jan-Erik Rediger using a static analyzer and
+        fixed by Salvatore Sanfilippo.
+* [FIX] Sentinel lack of arity checks for certain commands.
+        (Rogerio Goncalves, Salvatore Sanfilippo)
+
+* [NEW] Replication internals rewritten in order to be more resistant to bugs.
+        The replication handshake in the slave side was rewritten as a non
+        blocking state machine. (Salvatore Sanfilippo, Oran Agra)
+* [NEW] New "replication capabilities" feature introduced in order to signal
+        from the master to the slave what are the features supported, so that
+        the master can choose the kind of replication to start (diskless or
+        not) when master and slave are of different versions. (Oran Agra,
+        Salvatore Sanfilippo)
+* [NEW] Log clients details when SLAVEOF command is received. (Salvatore
+        Sanfilippo with inputs from Nick Craver and Marc Gravell).
+
 --[ Redis 2.8.21 ] Release date: 4 Jun 2015
 
 Upgrade urgency: HIGH for Redis because of a security issue.

src/version.h

@@ -1 +1 @@
-#define REDIS_VERSION "2.8.21"
+#define REDIS_VERSION "2.8.22"