Java Edition 1.15.1

Minecraft 1.15.1
Edition	Java Edition
Release date	December 17, 2019
Downloads	Client (.json) Server
Obfuscation maps	Client Server
Protocol version	575
Data version	2227
See also other instances of 1.15.1	Minecraft Dungeons

1.15.1 is a minor update to Java Edition released on December 17, 2019, which improves performance and fixes a few bugs in 1.15. This was the final version to be released in 2019 and 2010s decade overall.

Changes

Mobs

Dolphin

• Now can not spawn in bubble columns.

General

Performance

• Optimized chunk rendering performance, especially for chunks with many different block states.

Network handling

• Improved network handling of invalid biome IDs.

Fixes

10 issues fixed

From released versions before 1.15

• MC-96174 – Highlighted slot darkening.
• MC-126856 – When auto-jump is enabled, the game checks an incorrect block to decide whether the player should jump or not.
• MC-135050 – NullPointerException while tessellating block model.
• MC-150508 – Resource pack format was not incremented to 5.
• MC-152516 – Dolphins can spawn in soul sand bubble columns.
• MC-163571 – Walls are lit too dark when connecting to ice.

From 1.15

• MC-167482 – Corrupt chunk causes force upgrading a world to fail.
• MC-167530 – Anvils causing java.lang.StackOverflowError.

Other

• Fixed an error that was spammed to the game's log files caused by custom spawner blocks spawning villagers.
• Fixed a crash that occurred in the Realms screen.

Video

Video made by slicedlime:

Trivia

• 1.15.1 was the last full version to be released in 2019 and the 2010s decade.