Minecraft:Java Edition 13w39a

13w39a is the eighth Minecraft:snapshot for Minecraft:Java Edition 1.7.2, released on September 26, 2013.<ref>Template:Cite</ref> It adds Minecraft:red sand to mesa biomes and allows for more than one enchantment on a book.

The server was reuploaded just over an hour after release.Template:More info

Additions

Generated on the lowest surface levels of the mesa biome.
Behaves like normal sand.
Can be smelted into Minecraft:glass and crafted into Minecraft:TNT, but cannot be crafted into Minecraft:sandstone.

Can only be obtained using Template:Cmd, Template:Cmd or Template:Cmd.
Activated by Minecraft:activator rails.
- Run their command every so often as long as they are powered - a command block minecart going across a single powered activator rail at full speed runs its command thrice.
Can be success-tested while on a Minecraft:detector rail with a Minecraft:redstone comparator next to the rail (just like how the minecart with chest and minecart with hopper can be fill-checked).

Minecraft:Orange terracotta generates in place of sandstone, but not in the same type of formation.

Logging

Now done using Log4j 2.
- Default logging location is now in logs/latest.log, older logs are archived in logs/year-months-day-counter.log.gz with GZIP compress. The year is 4 digits, and the month and day are both 2 digits. The counter is the number of startups on the day. The counter is 1 when the first startup of the day and increasing each startup.
- The way logs are saved can be changed, examples: HTML page, database, errors only, no logging at all.
- As a result, this is the first version to be affected by the Log4Shell security vulnerability, although running the game through the current launcher will automatically apply a patch to fix it.

13w39a was previously removed from the Minecraft:launcher for some time, but was added back in September 2018.