1.9.3 is a minor update to Minecraft (Java Edition) released on May 10, 2016,^[1] which adds the /stopsound command, limits the y-value of /tp, and improves Minecraft 's networking libraries. It is not compatible with 1.9.2 servers. However, due to an incorrect snapshot warning when loading a world saved in an older version, 1.9.3 was replaced by 1.9.4 the same day.

Additions

Commands

/stopsound

• Permits the player to choose which specific sounds should be stopped from playing.
  • Syntax: /stopsound <targets> [<source>] <sound>.

Changes

Commands

/tp

• No longer teleports the player to a y-coordinate outside the range −512 to 512.

General

Networking

• As of the release of this version, the Netty networking library that Minecraft uses, now checks sessionserver.mojang.com/blockedservers when connecting to a multiplayer server, and if the server is on the blocked server list, it reports to the user that the server is unavailable.
  • The blocklist consists of servers in violation of the Minecraft EULA (End User License Agreement).
  • This affects all versions that depend on the Netty library, back to version 1.7.2 snapshot 13w41a.
• Better memory use of pathfinding and biome caching.
  • This prevents memory leaking.

Fixes

12 issues fixed

From released versions before 1.9

• MC-17630 – Zombie pathfinding to unreachable targets causes server lag.
• MC-82464 – Colored 'dead' skin template parts cause in-game issues.

From 1.9

• MC-87907 – Endermen do not become aggressive when players look at their head/feet.
• MC-88357 – Crash when going outside height limit or into the void with F3.
• MC-89760 – Skin's jacket parts do not show up under specific conditions.
• MC-94438 – Server: Mob pathfinding induced massive lag in any versions 15w49a and later.
• MC-96526 – Crash caused by StackOverflowError when trading too many items at once.
• MC-98994 – Chunk generation performance regressed by 20–30%.

From 1.9.1

• MC-100692 – Collisions cause extreme lag.

From 1.9.2

• MC-100382 – Pathfinding memory leak.
• MC-100410 – Corrupting world by teleporting to y=±infinity.
• MC-100442 – DEV – navigation listener very slow code.

Video

Video made by slicedlime:

References