Minecraft 1.17.1-rc2
Release candidateLegacy 1.xMinecraft 1.17.1-rc2 is a Java Edition release candidate released on 5 Jul 2021 under the classic 1.x numbering. Mojang lists Java 16 as the required runtime. It speaks network protocol 1073741864.
Minecraft 1.17.1 Release Candidate 2
A second Release Candidate for Minecraft Java Edition 1.17.1 is now available in the launcher, fixing some critical issues. If nothing critical is found, we expect this to be released as the full version of 1.17.1 on Tuesday, July 6th. The Caves & Cli
- Released
- 5 Jul 2021
- Requires Java
- Java 16+
- Protocol version
- 1073741864
- Data version
- 2729
- Version group
- 1.17
- Numbering
- Legacy (1.x)
- Server software
- 1 with builds
- Position
- #585 of 903
Official downloads
Served by Mojang. Verify the checksum before running anything.
| File | Size | SHA-1 | Download |
|---|---|---|---|
| Server jar | 41.6 MB | dd9ca1bdc855… | piston-data.mojang.com ↗ |
| Client jar | 18.6 MB | 132b56af0236… | piston-data.mojang.com ↗ |
The catalogue on 1.17.1-rc2
Projects that name 1.17.1-rc2 in their own release metadata. Follow any of these to the full filtered list.
What runs on 1.17.1-rc2
Builds are counted from each project's own API; declared support comes from the loader's metadata.
| Software | Latest build | Published | Checksum | Download |
|---|---|---|---|---|
| Sponge | #2 | 28 Jul 2026 | Not published | jar ↗ |
| Sponge | 1.17.1-rc2-9.0.0-RC727 | Not build based | inferred | loader |
| Fabric Loader | 0.19.3 | Not build based | declared | loader |
| Quilt Loader | 0.30.1-beta.2 | Not build based | declared | loader |
Everything in 1.17
14 versions in this group.
| Version | Type | Protocol | Released |
|---|---|---|---|
| 1.17.1 | Release | 756 | 6 Jul 2021 |
| 1.17.1-rc2 | Release candidate | 1073741864 | 5 Jul 2021 |
| 1.17.1-rc1 | Release candidate | 1073741863 | 1 Jul 2021 |
| 1.17.1-pre3 | Pre-release | 1073741862 | 30 Jun 2021 |
| 1.17.1-pre2 | Pre-release | 1073741861 | 29 Jun 2021 |
| 1.17.1-pre1 | Pre-release | 1073741860 | 18 Jun 2021 |
| 1.17 | Release | 755 | 8 Jun 2021 |
| 1.17-rc2 | Release candidate | 1073741859 | 7 Jun 2021 |
| 1.17-rc1 | Release candidate | 1073741858 | 4 Jun 2021 |
| 1.17-pre5 | Pre-release | 1073741857 | 3 Jun 2021 |
| 1.17-pre4 | Pre-release | 1073741856 | 2 Jun 2021 |
| 1.17-pre3 | Pre-release | 1073741855 | 1 Jun 2021 |
| 1.17-pre2 | Pre-release | 1073741854 | 31 May 2021 |
| 1.17-pre1 | Pre-release | 1073741853 | 27 May 2021 |
Questions about Minecraft 1.17.1-rc2
What Java version does Minecraft 1.17.1-rc2 require?
Minecraft 1.17.1-rc2 requires Java 16 or newer. Mojang publishes this in the version metadata, so an older runtime refuses to start it.
What protocol version does Minecraft 1.17.1-rc2 use?
Minecraft 1.17.1-rc2 speaks protocol 1073741864. A client and a server can only connect when their protocol numbers match.
Where do I download the Minecraft 1.17.1-rc2 server jar?
Mojang hosts it directly. This page links to the official file with its SHA-1 checksum and size, so you can verify the download before you run it. We do not mirror or repackage it.
Which server software supports Minecraft 1.17.1-rc2?
Sponge publish builds for 1.17.1-rc2. Each one is listed with its build number and checksum.
Go deeper
Metadata from Mojang’s official version manifest. Protocol and data versions from the PrismarineJS minecraft-data project.