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  1. Minecraft: Java Edition
  2. MC-79868

Minecraft does not free ram

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    Details

    • Type: Bug
    • Status: Resolved
    • Resolution: Invalid
    • Affects Version/s: Minecraft 1.8.4
    • Fix Version/s: None
    • Labels:
    • Confirmation Status:
      Unconfirmed

      Description

      I hope this report is valid because I am not so familiar with how a program should use the ram and under which circumstances it should free it.

      When I open a world, my ram usage goes up to about 550.000K. When I summon now entities and kill them again, it will still stay up that high.

      A good way to reproduce it is first using this command
      and then run:

      /entitydata @e[type=ArmorStand,name=Test] {CustomName:Test}
      

      For me it freezes (ram usage goes up to 1.310.000K) and then gives this error:

      [17:36:54] [Client thread/FATAL]: Error executing task
      java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space
      	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_25]
      	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_25]
      	at g.a(SourceFile:61) [1.8.4.jar:?]
      	at ave.av(SourceFile:880) [1.8.4.jar:?]
      	at ave.a(SourceFile:325) [1.8.4.jar:?]
      	at net.minecraft.client.main.Main.main(SourceFile:124) [1.8.4.jar:?]
      Caused by: java.lang.OutOfMemoryError: Java heap space
      	at java.util.Arrays.copyOfRange(Arrays.java:3664) ~[?:1.8.0_25]
      	at java.lang.String.<init>(String.java:201) ~[?:1.8.0_25]
      	at java.lang.StringBuilder.toString(StringBuilder.java:407) ~[?:1.8.0_25]
      	at avu.a(SourceFile:40) ~[1.8.4.jar:?]
      	at avt.a(SourceFile:139) ~[1.8.4.jar:?]
      	at avt.a(SourceFile:129) ~[1.8.4.jar:?]
      	at avt.a(SourceFile:125) ~[1.8.4.jar:?]
      	at bcy.a(SourceFile:527) ~[1.8.4.jar:?]
      	at fy.a(SourceFile:44) ~[1.8.4.jar:?]
      	at fy.a(SourceFile:9) ~[1.8.4.jar:?]
      	at fh$1.run(SourceFile:13) ~[1.8.4.jar:?]
      	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_25]
      	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_25]
      	at g.a(SourceFile:60) ~[1.8.4.jar:?]
      	... 3 more
      

      But the ram usage stays that high and doesn't decrease anymore until you close Minecraft

      This means Minecraft neither frees ram when closing a world nor when killing entities (or when running commands). In some way the ram usage decreases, but it doesn't go back to about 550.000K.

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            Assignee:
            Unassigned Unassigned
            Reporter:
            marcono1234 [Mod] Marcono1234
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              Dates

              Created:
              Updated:
              Resolved: