Java Edition Classic 0.0.21a_01

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Missing Texture Block JE3 BE2.png
This version is currently missing.
While this version is known to exist it is missing from the launcher and has not been archived elsewhere, meaning that it is currently lost.
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Classic 0.0.21a 01.png

Java Edition

Server version


Release date

June 23, 2009


Client not archived

Protocol version


0.0.21a_01[1][2] was a version of Classic released on June 23, 2009, at 16:17 UTC.[3][4]


  • Attempted to fix a "hang bug" by adding a max iterations to the clipping.[3][5]
    • However, the game will still hang.[6]



  • IRC logs on; #minecraft.20090623.log. June 23, 2009 (UTC−5).
  1. "MineCraft house tour"– Chantaru413 on YouTube, June 26, 2009
  3. a b "Is the hang bug fixed in 0.0.21a_01?" – The Word of Notch, June 23, 2009
  4. IRC logs: "A11:17:11 <08Notch> client 0.0.21a_01 is up, fixing the hang bug" (16:17:11 UTC)
  5. IRC logs: "A11:40:57 <08Notch> the only difference between 0.0.21a and _01 is that I added a max iterations on the clipping" (16:40:57 UTC)
  6. IRC logs: "A11:24:10 <08Notch> so it still hangs? :-O [...] A11:24:14 <akuryo> yeah notch" (16:24 UTC)