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  1. Minecraft: Java Edition
  2. MC-143854

Idle java server load 100% on snapshots

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Details

    • Bug
    • Status: Resolved
    • Resolution: Duplicate
    • Minecraft 19w05a, Minecraft 19w06a
    • None
    • None
    • Ubuntu 16.04.5 LTS / Ubuntu 18.04.1 LTS [64 bit]

      java version "1.8.0_202" / "11.0.2" 2019-01-15 LTS

      Pentium 2.7 Ghz Dual Core

      16GB RAM
    • Unconfirmed

    Description

      Starting a fresh minecraft server running it with:

      /opt/jdk1.8.0_202/bin/java -d64 -Xmx4g -jar server.jar

      or

      /opt/jdk-11.0.2/bin/java -Xmx4g -jar server.jar

      ...where server.jar is one of the following versions:

      • 18w43a
      • 19w04a
      • 19w05a
      • 19w06a

      ...yields in a server starting up, generating and loading the world and then waiting for somebody to connect. One of the CPU cores remains on 100% at all times, even after quite some runtime, when somebody is connected or nobody is connected anymore. I had a server running over night and it was still on 100% cpu usage.

       

      I've tested the same scenario with v1.13.2 server.jar and after the initial generation and loading phase, the cpu usage drops first to like 16% and then below 3% and remains there.

      I am able to run jvisualvm, if necessary. Since I have not much experience with the tool (and which probings you would need), I could supply you with the necessary data.

      However if you'd just test this setup, you should get the same result and analyse this yourself.

      Please fix for the next snapshot!

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              Unassigned Unassigned
              tcmsurfer Andreas Stahl
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                Updated:
                Resolved: