How to Fix an Izakji's New Beginnings Server That Keeps Crashing
Izakji's New Beginnings is a medium-sized Vanilla+ pack on Forge 1.20.1, built around Serene Seasons, expanded biomes, and quality-of-life tweaks rather than heavy automation or combat systems. Most crash reports for packs like this trace back to a handful of environmental and state-tracking issues rather than deep mod conflicts — this guide walks through them in the order you should actually check them.
See the Izakji's New Beginnings pack page for the full RAM and setup breakdown before you chase anything else.
1. Confirm you're running Java 17
Forge 1.20.1 requires Java 17, and this is the first thing to rule out on any boot failure or early crash. Running Java 8 or Java 11 against a 1.20.1 Forge server typically produces an UnsupportedClassVersionError or a silent failure to start, which can look like a generic 'crash' if you're not reading the startup log closely.
- Check the Java version your server process is actually launching with, not just what's installed system-wide
- A mismatched Java version is a boot-time failure, not a mid-session crash — if the server runs fine for hours before crashing, look elsewhere first
2. Serene Seasons state tracking under load
Serene Seasons keeps ongoing per-world state for season progression, temperature, and weather, layered on top of normal survival-world simulation. This is similar to other environment-simulation mods: it's rarely the direct cause of a crash, but it adds steady background load that can tip a server that's already marginal on RAM or CPU into instability.
If crashes cluster around season transitions or worldgen in new chunks (where seasonal biome data gets calculated for the first time), that's a reasonable signal to start there.
3. Chunk loading and new-area exploration
Like most Vanilla+ packs with expanded biomes, a large share of crash reports on packs in this category come from players exploring into freshly generated terrain rather than from steady-state gameplay in already-loaded chunks. Generating new chunks with additional biome data is more CPU- and memory-intensive than ticking existing ones, so a server that's stable with a handful of players in explored territory can still choke when someone pushes into new terrain.
4. Corrupted config or world data after a bad shutdown
An ungraceful shutdown (power loss, OOM kill, forced process termination) can leave world or config files in a partially-written state. On the next boot this often shows up as a crash loop rather than a one-off error, since the server fails the same way every time it reads the damaged file. If crashes started suddenly after an unrelated outage or forced restart, check for this before assuming a mod is at fault — and always have a recent backup before testing fixes, since you don't want to compound the problem by editing world files blind.
5. RAM under the pack's realistic floor
The real floor for Izakji's New Beginnings is 4 GB. Because this pack has no heavy automation or combat-overhaul systems, it needs noticeably less than a large tech or combat pack — but under-provisioning below that floor still won't fail cleanly. What you'll actually see is cascading lag and longer garbage-collection pauses as available memory shrinks, which eventually trips a tick timeout and crashes the server, rather than an immediate, obvious out-of-memory error.
FAQ
What's the single most common cause of crashes on an Izakji's New Beginnings server?+
Running the wrong Java version. This pack is built on Forge 1.20.1, which requires Java 17 — Java 8 or Java 11 will either refuse to boot or fail partway through loading with obscure class-loading errors. Before digging into mods or logs, confirm the server is actually running on Java 17.
Does Serene Seasons cause crashes on its own?+
Rarely by itself, but it adds continuous per-world state tracking (season progression, temperature, weather) on top of normal survival simulation. On a server that's already tight on RAM or CPU, that extra ongoing state update is often the straw that turns a slow server into a crashed one — it's more of a contributing load than a direct cause.
How much RAM does an Izakji's New Beginnings server actually need?+
4 GB is the real floor for this pack. It's a medium-sized Vanilla+ pack without heavy automation or combat-overhaul mods, so it doesn't need the 8-12 GB you'd give a large tech or combat pack — but going below 4 GB will still produce the same symptoms: rising GC pauses, lag spikes, and eventual tick timeouts, not a clean error message.
Host Izakji's New Beginnings on hardware sized for its real floor
Izakji's New Beginnings runs reliably at its real 4 GB RAM floor — pair that with a backup before any risky config change so a bad shutdown never turns into a permanent crash loop.
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