Uploaded image for project: 'Minecraft: Java Edition'
  1. Minecraft: Java Edition
  2. MC-143854

Idle java server load 100% on snapshots

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Resolved
    • Resolution: Duplicate
    • Affects Version/s: Minecraft 19w05a, Minecraft 19w06a
    • Fix Version/s: None
    • Labels:
      None
    • Environment:
      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
    • Confirmation Status:
      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!

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                Unassigned
                Reporter:
                tcmsurfer Andreas Stahl
              • Votes:
                0 Vote for this issue
                Watchers:
                1 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: