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  1. Minecraft: Java Edition
  2. MC-168596

Chunks outside of render distance are not consistently unloaded

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    Details

    • Type: Bug
    • Status: Reopened
    • Resolution: Unresolved
    • Affects Version/s: 1.15.1
    • Fix Version/s: None
    • Labels:
      None
    • Environment:
      Max OSX 10.11.6
    • Confirmation Status:
      Unconfirmed
    • Category:
      (Unassigned)

      Description

      This issue was introduced in 1.15, and persists in 1.15.1. I'm not sure how to reliably reproduce it, except on my unreleased custom map, so here's what I know.

      Sometimes when moving away from loaded chunks such that they fall outside of render distance, they stay loaded. That means you can still set blocks in them with commands, and you can still target the entities in them with @e. These are not spawn chunks. Save/Quit and re-entering the world will cause the chunks to become unloaded.

      This seems to consistently happen for some chunks in my world, and inconsistently happen for others.

      This causes huge performance problems, particularly on higher render distances and on maps with data packs running many @e commands.

      The easiest way to test it is to summon an entity with a unique name or tag outside of spawn chunks and fly away. Then run "/say @e[name=<uniquename>]" and see if their names pop up. You can also execute at them to set blocks to prove that the chunks themselves are loaded, and not just the entities within.

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            Assignee:
            Unassigned Unassigned
            Reporter:
            avantir_yihn Avantir_Yihn
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              Dates

              Created:
              Updated: