How to Fix a Chosen's Modded Adventure: Chunk by Chunk Server That Keeps Crashing

1. Check Java 17 first — the most common Forge 1.20.1 boot failure

Forge 1.20.1 requires Java 17 to run. If your server fails to boot at all, or crashes within the first few seconds before the world finishes loading, this is the first thing to rule out — it's a far more common cause than anything mod-related, and it's the fastest to check.

• Confirm the server is actually launching under Java 17, not an older default runtime
• Check your panel's Java version setting or start script, not just what's installed system-wide

2. Chunk-unlock lag spikes that look like crashes

Each new chunk-unlock event generates and loads terrain on demand, which is noticeably heavier than normal ambient chunk loading and can produce a brief lag spike right at the moment a chunk unlocks. On a server running close to its limits, that spike is enough to push tick times past the timeout threshold, which reads in the console and to players as a hard crash even though it's really a resource spike.

If crashes cluster specifically around unlock moments rather than happening randomly during normal play, this is the most likely explanation — and it points to provisioning headroom, not a bug in the pack.

3. Mod conflicts in a dense kitchen-sink modlist

The chunk-by-chunk constraint sits on top of a full kitchen-sink modlist spanning tech, magic, and exploration content, and that breadth raises the odds of a specific mod-interaction conflict compared to a narrower-scope pack. When a crash isn't tied to an unlock event or an obvious resource spike, check the crash log for the mod that actually threw the exception rather than assuming it's the chunk-gating system itself — the gating mechanic is usually not the mod at fault.

4. A crash exactly at an unlock boundary is worth treating differently

Because the chunk-by-chunk mechanic writes new chunk data in direct response to a custom unlock event, a crash that happens precisely during that transition deserves a different response than a generic in-game crash. Repeatedly retrying the same unlock into a server that just crashed on it risks writing further into an already-stressed region. Restoring from a backup taken before the unlock and re-triggering it fresh is the safer path if a retry or two doesn't resolve it cleanly.

5. RAM under the pack's realistic floor

7 GB is the real floor for Chosen's Modded Adventure: Chunk by Chunk, not a generic guess based on the chunk-gating gimmick alone — the underlying kitchen-sink modlist is what actually drives memory use. Under-provisioning rarely shows up as one clean, instant crash. More often it looks like lag building up over a session, garbage-collection pauses getting longer and more frequent, and then eventually a tick timeout that takes the server down — which is easy to misdiagnose as a mod bug when the real cause is simply not enough headroom.