Fix player autosave#459
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This PR fixes a critical bug in the game that can cause a rollback (very important) after a crash (I've already experienced this). I strongly advise merging it as soon as possible |
javividev
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…#463, PaperMC#465 - PaperMC#465: Cleanup startup thread (remove regionizedServer field, return instead of sleep loop) - PaperMC#463: Generate crash reports on region/scheduler crash - PaperMC#461: Fix chat during shutdown via IS_SHUTDOWN flag in RegionShutdownThread - PaperMC#391: Expand TPS API with getRegionAverageTickTimes() methods - PaperMC#459: Fix player autosave by setting lastSave on join and checking LAST_SAVE_ABSENT Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
javividev
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Jun 16, 2026
…#463, PaperMC#465 - PaperMC#465: Cleanup startup thread (remove regionizedServer field, return instead of sleep loop) - PaperMC#463: Generate crash reports on region/scheduler crash - PaperMC#461: Fix chat during shutdown via IS_SHUTDOWN flag in RegionShutdownThread - PaperMC#391: Expand TPS API with getRegionAverageTickTimes() methods - PaperMC#459: Fix player autosave by setting lastSave on join and checking LAST_SAVE_ABSENT
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Folia forgets to set the
lastSavelongfield on join of a player, making it so that Folia doesn't ever run autosave on players unless saved manually, of which after a manual save, autosave starts because inPlayerlist#save(Lnet/minecraft/server/level/ServerPlayer;), thelongfield,lastSaveis set. By setting this on join toSystem.nanoTime()and checking for theLAST_SAVE_ABSENTvalue during autosave, this fixes players not being autosavedOriginal:
https://github.com/CraftCanvasMC/Canvas/blob/00b4aed9f9a2c17300a9603827075b761962787d/canvas-server/minecraft-patches/base/0008-Fixup-Region-Threading.patch#L3954
CraftCanvasMC/Canvas#210