How to Fix a Chosen's Modded Adventure Server That Keeps Crashing
Chosen's Modded Adventure fuses exploration-focused world content with Ars Nouveau's component-based custom spell system as its core progression loop, built on Forge 1.20.1. That combination — heavy spell/familiar tick activity plus large amounts of new terrain being generated on the fly — creates a specific, recognizable set of crash patterns. Here's what actually tends to go wrong, and in what order to check it.
See the Chosen's Modded Adventure pack page for the full RAM and setup breakdown before you chase anything else.
1. Wrong Java version on boot
Forge 1.20.1 requires Java 17, and this is the first thing worth ruling out on any boot failure. If the server process exits almost immediately with no mod-loading output at all, you're very likely looking at a Java version mismatch rather than a mod conflict — check what JDK the server is actually launching with before digging any further.
- Confirm the launch script or panel is pointed at Java 17, not Java 8/11/21
- A near-instant exit with no Forge mod list printed is the tell
2. Tick lag and timeouts during heavy spell-casting
Ars Nouveau's familiar entities and spell-particle effects carry a real, well-documented tick cost on any Ars Nouveau-centric pack, and Chosen's Modded Adventure leans on that system as its main progression path. When several players are casting at once — especially with summoned familiars active — the extra entity and particle processing per tick can push an already-stressed server over the edge.
A single spell going off rarely causes an issue on its own. It's sustained multi-player casting sessions, or several familiars active simultaneously, where the cumulative tick cost adds up and a watchdog timeout follows.
3. First-chunk-load lag spikes from exploration content
Exploration-focused world generation mods tend to produce a noticeable lag spike the first time a player walks into unexplored terrain, since that's when all the new structure and feature generation for that chunk happens at once. This is a generation-time cost, not a memory leak, so it shows up as a one-off freeze near new terrain rather than a recurring pattern in already-explored areas.
4. Compounding effect: exploration + spellcasting at the same time
The riskiest moment on this pack is when both load sources line up — a group pushing into fresh terrain while also fighting or casting spells. Chunk generation cost and spell/familiar tick cost stack on top of each other, and that combination is a more plausible trigger for a tick-timeout crash than either one alone. If crashes cluster around exploration pushes rather than base-building or quiet play, this overlap is worth checking first.
5. RAM under the pack's realistic floor
The real floor for Chosen's Modded Adventure is 6 GB. Running below that doesn't typically produce a clean, instant crash — it shows up first as climbing garbage-collection pauses and gradually increasing tick time under load, and the eventual crash is a tick timeout once that degradation has gone far enough. If you're seeing recurring freezes that correlate with spellcasting or exploration rather than a specific mod error, confirming the server is actually allocated at or above 6 GB is one of the cheapest checks you can do.
FAQ
My server won't even boot — where should I look first?+
Check the Java version before anything else. Forge 1.20.1 (what Chosen's Modded Adventure runs on) requires Java 17, and a server accidentally pointed at Java 8 or 11 will fail to start with a version-related error in the console, not a clean message about mods. This is the single most common reason a Forge 1.20.1 pack refuses to boot.
The server lags hard or freezes during big fights with spells flying everywhere — is that normal?+
To an extent, yes. Ars Nouveau's familiar entities and spell-particle effects add real per-tick cost, and that's a well-documented pattern on any Ars Nouveau-centric pack, not something unique to a broken install. A short TPS dip during a heavy multi-caster fight is expected; a full tick-timeout crash during the same moment usually means the server is already running too close to its RAM/CPU ceiling and the spell burst is just what tips it over.
How much RAM does Chosen's Modded Adventure actually need?+
The real floor is 6 GB. That's lower than what you'd guess from eyeballing a magic-plus-exploration pack's mod count, but it's what holds up under sustained play. Going below it doesn't usually crash the server outright — it shows up first as climbing GC pauses and creeping tick time, and the crash (a tick timeout / watchdog kill) is what happens after that's gone unnoticed for a while.
Host Chosen's Modded Adventure on hardware sized for its real floor
Chosen's Modded Adventure needs a genuine 6 GB floor to handle Ars Nouveau's spell/familiar tick load alongside exploration chunk generation — and taking a backup before any risky config change means a bad tweak costs you minutes, not your world.
View Minecraft Hosting →