Box2D not working on 1.10.1-SNAPSHOT with Linux

[bergice]

Issue details

The latest gdx snapshot (1.10.1-SNAPSHOT) is not working with Box2D on my Amazon Linux 2 EC2 instance.

Unknown if this is isolated to just Amazon distros or not.

Context: https://discord.com/channels/348229412858101762/873537733430226964/936111896023695411

Reproduction steps/code

1. Create an Amazon Linux 2 EC2 instance
2. Dist a libGDX jar using 1.10.1-SNAPSHOT that creates a Box2D world.
3. Run the jar on the EC2 instance: java -jar mygame.jar
4. See error stack trace when creating Box2D world: Caused by: com.badlogic.gdx.utils.SharedLibraryLoadRuntimeException: Couldn't load shared library 'libgdx-box2d64.so' for target: Linux, 64-bit

Version of libGDX and/or relevant dependencies

• libGDX version: 1.10.1-SNAPSHOT
• gradlew server:dependencies output:

|    +--- project :core
|    |    +--- com.badlogicgames.gdx:gdx:1.10.1-SNAPSHOT
|    |    |    \--- com.badlogicgames.gdx:gdx-jnigen-loader:2.2.0
|    |    +--- com.badlogicgames.gdx:gdx-box2d:1.10.1-SNAPSHOT
|    |    |    \--- com.badlogicgames.gdx:gdx:1.10.1-SNAPSHOT (*)
|    |    +--- com.github.tommyettinger.gdx-utils:libgdx-utils:0.13.7
|    |    |    \--- com.badlogicgames.gdx:gdx:1.9.12 -> 1.10.1-SNAPSHOT (*)
|    |    +--- com.github.tommyettinger.gdx-utils:libgdx-utils-box2d:0.13.7
|    |    |    +--- com.github.tommyettinger.gdx-utils:libgdx-utils:0.13.7 (*)
|    |    |    \--- com.badlogicgames.gdx:gdx-box2d:1.9.12 -> 1.10.1-SNAPSHOT (*)
|    |    +--- com.github.czyzby:gdx-websocket:1.9.1.9.6
|    |    +--- com.github.czyzby:gdx-websocket-serialization:1.9.1.9.6
|    |    |    \--- com.github.czyzby:gdx-websocket:1.9.1.9.6
|    |    +--- de.golfgl.gdxgameanalytics:gdx-gameanalytics-core:1.0.0
|    |    |    \--- com.badlogicgames.gdx:gdx:1.9.5 -> 1.10.1-SNAPSHOT (*)
|    |    +--- com.github.tommyettinger:jagd:191bdd1ceb
|    |    |    \--- com.badlogicgames.gdx:gdx:1.9.10 -> 1.10.1-SNAPSHOT (*)
|    |    +--- space.earlygrey:shapedrawer:8e2a97479fb9ba7f07b842afa5512240e8bc3d41
|    |    |    \--- com.badlogicgames.gdx:gdx:1.9.10 -> 1.10.1-SNAPSHOT (*)
|    |    +--- com.kotcrab.vis:vis-ui:1.4.2
|    |    |    \--- com.badlogicgames.gdx:gdx:1.9.9 -> 1.10.1-SNAPSHOT (*)
|    |    +--- com.github.payne911:PieMenu:5.0.0
|    |    |    +--- com.badlogicgames.gdx:gdx:1.9.10 -> 1.10.1-SNAPSHOT (*)
|    |    |    \--- space.earlygrey:shapedrawer:2.3.0 -> 8e2a97479fb9ba7f07b842afa5512240e8bc3d41 (*)
|    |    +--- com.github.tommyettinger:formic:0.1.4
|    |    |    +--- com.google.jsinterop:base:1.0.0-RC1
|    |    |    |    \--- com.google.jsinterop:jsinterop-annotations:1.0.2
|    |    |    +--- com.google.elemental2:elemental2-core:1.0.0-RC1
|    |    |    |    +--- com.google.jsinterop:jsinterop-annotations:1.0.2
|    |    |    |    \--- com.google.jsinterop:base:1.0.0-RC1 (*)
|    |    |    \--- com.google.elemental2:elemental2-dom:1.0.0-RC1
|    |    |         +--- com.google.jsinterop:jsinterop-annotations:1.0.2
|    |    |         +--- com.google.jsinterop:base:1.0.0-RC1 (*)
|    |    |         +--- com.google.elemental2:elemental2-core:1.0.0-RC1 (*)
|    |    |         \--- com.google.elemental2:elemental2-promise:1.0.0-RC1
|    |    |              +--- com.google.jsinterop:jsinterop-annotations:1.0.2
|    |    |              \--- com.google.jsinterop:base:1.0.0-RC1 (*)
|    |    +--- org.slf4j:slf4j-simple:1.7.9
|    |    |    \--- org.slf4j:slf4j-api:1.7.9 -> 1.7.25
|    |    \--- com.google.gwt:gwt-user:2.8.0
|    |         +--- com.google.jsinterop:jsinterop-annotations:1.0.1 -> 1.0.2
|    |         +--- javax.validation:validation-api:1.0.0.GA
|    |         +--- javax.servlet:javax.servlet-api:3.1.0
|    |         \--- org.w3c.css:sac:1.3
|    +--- com.badlogicgames.gdx:gdx-backend-lwjgl:1.10.1-SNAPSHOT
|    |    +--- com.badlogicgames.gdx:gdx:1.10.1-SNAPSHOT (*)
|    |    +--- org.lwjgl.lwjgl:lwjgl:2.9.3
|    |    |    +--- org.lwjgl.lwjgl:lwjgl-platform:2.9.3
|    |    |    \--- net.java.jinput:jinput:2.0.5
|    |    |         +--- net.java.jutils:jutils:1.0.0
|    |    |         \--- net.java.jinput:jinput-platform:2.0.5
|    |    +--- com.badlogicgames.jlayer:jlayer:1.0.1-gdx
|    |    \--- org.jcraft:jorbis:0.0.17
|    +--- com.badlogicgames.gdx:gdx-platform:1.10.1-SNAPSHOT
|    +--- com.badlogicgames.gdx:gdx-box2d-platform:1.10.1-SNAPSHOT
|    +--- com.badlogicgames.gdx:gdx-backend-headless:1.10.1-SNAPSHOT
|    |    \--- com.badlogicgames.gdx:gdx:1.10.1-SNAPSHOT (*)
|    +--- com.badlogicgames.gdx:gdx-tools:1.10.1-SNAPSHOT
|    |    +--- com.badlogicgames.gdx:gdx-backend-lwjgl:1.10.1-SNAPSHOT (*)
|    |    +--- com.badlogicgames.gdx:gdx-freetype:1.10.1-SNAPSHOT
|    |    |    \--- com.badlogicgames.gdx:gdx:1.10.1-SNAPSHOT (*)
|    |    \--- com.badlogicgames.gdx:gdx-backend-headless:1.10.1-SNAPSHOT (*)
|    +--- org.mockito:mockito-all:1.9.5
|    \--- com.github.Anuken:GdxGifRecorder:1.3
|         \--- com.badlogicgames.gdx:gdx:1.9.5 -> 1.10.1-SNAPSHOT (*)
+--- project :core (*)
+--- org.java-websocket:Java-WebSocket:1.4.0
|    \--- org.slf4j:slf4j-api:1.7.25
+--- org.luaj:luaj-jse:3.0.1
+--- org.spongepowered:noise:2.0.0-SNAPSHOT
\--- com.sudoplay.joise:joise:1.1.0

Stacktrace

ec2 Amazon Linux 2 instance stack trace (when calling new World()):

ec2.internal bash[25188]: Exception in thread "HeadlessApplication" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.ExceptionInInitializerError
ec2.internal bash[25188]: at com.badlogic.gdx.backends.headless.HeadlessApplication$1.run(HeadlessApplication.java:98)
ec2.internal bash[25188]: Caused by: java.lang.ExceptionInInitializerError
ec2.internal bash[25188]: at io.lurkers.game.Level.create(Level.java:82)
ec2.internal bash[25188]: at io.lurkers.game.Game.loadLevel(Game.java:128)
ec2.internal bash[25188]: at io.lurkers.server.ListenerServer.event(ListenerServer.java:46)
ec2.internal bash[25188]: at io.lurkers.game.messagequeue.MessageQueue.notifyListeners(MessageQueue.java:144)
ec2.internal bash[25188]: at io.lurkers.game.messagequeue.MessageQueue.process(MessageQueue.java:55)
ec2.internal bash[25188]: at io.lurkers.game.messagequeue.MessageQueue.process(MessageQueue.java:38)
ec2.internal bash[25188]: at io.lurkers.game.Game.create(Game.java:82)
ec2.internal bash[25188]: at io.lurkers.server.GameServerHeadless.create(GameServerHeadless.java:169)
ec2.internal bash[25188]: at com.badlogic.gdx.backends.headless.HeadlessApplication.mainLoop(HeadlessApplication.java:108)
ec2.internal bash[25188]: at com.badlogic.gdx.backends.headless.HeadlessApplication$1.run(HeadlessApplication.java:93)
ec2.internal bash[25188]: Caused by: com.badlogic.gdx.utils.SharedLibraryLoadRuntimeException: Couldn't load shared library 'libgdx-box2d64.so' for target: Linux, 64-bit
ec2.internal bash[25188]: at com.badlogic.gdx.utils.SharedLibraryLoader.load(SharedLibraryLoader.java:128)
ec2.internal bash[25188]: at com.badlogic.gdx.physics.box2d.World.<clinit>(World.java:188)
ec2.internal bash[25188]: ... 10 more
ec2.internal bash[25188]: Caused by: com.badlogic.gdx.utils.SharedLibraryLoadRuntimeException: java.lang.UnsatisfiedLinkError: /tmp/libgdxec2-user/443f008d/libgdx-box2d64.so: /lib64/libm.so.6: version `GLIBC_2.27' not found (required by /tmp/libgdxec2-user/443f008d/libgdx-box2d64.so)
ec2.internal bash[25188]: at com.badlogic.gdx.utils.SharedLibraryLoader.loadFile(SharedLibraryLoader.java:324)
ec2.internal bash[25188]: at com.badlogic.gdx.utils.SharedLibraryLoader.load(SharedLibraryLoader.java:124)
ec2.internal bash[25188]: ... 11 more
ec2.internal bash[25188]: Caused by: java.lang.UnsatisfiedLinkError: /tmp/libgdxec2-user/443f008d/libgdx-box2d64.so: /lib64/libm.so.6: version `GLIBC_2.27' not found (required by /tmp/libgdxec2-user/443f008d/libgdx-box2d64.so)
ec2.internal bash[25188]: at java.lang.ClassLoader$NativeLibrary.load(Native Method)
ec2.internal bash[25188]: at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1934)
ec2.internal bash[25188]: at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1817)
ec2.internal bash[25188]: at java.lang.Runtime.load0(Runtime.java:810)
ec2.internal bash[25188]: at java.lang.System.load(System.java:1088)
ec2.internal bash[25188]: at com.badlogic.gdx.utils.SharedLibraryLoader.loadFile(SharedLibraryLoader.java:330)
ec2.internal bash[25188]: at com.badlogic.gdx.utils.SharedLibraryLoader.loadFile(SharedLibraryLoader.java:299)
ec2.internal bash[25188]: ... 12 more

Please select the affected platforms

• [ ] Android
• [ ] iOS
• [ ] HTML/GWT
• [ ] Windows
• [X] Linux
• [ ] macOS

[tommyettinger]

I was debugging some of this with bergice on Discord, and wow this is a strange one. GLIBC_2.27 being missing seems to be the main root cause, and I don't know how it relates to box2d and libm. Could this be related to the change we made to the Linux build system, required by GH Actions to move to a newer Ubuntu version? Another remote possibility is that the dependencies on both LWJGL 2 and Headless backends conflict in some way in the newer snapshot, though I believe only Headless is used here.

[fgnm]

I had a similar problem with another Linux distro, and yes the problem was the GLIBC version.. Since libGDX is now built with Ubuntu 18.04 you need at least glibc 2.27 and probably in your AWS instance is installed an older version.. Looking at Amazon Linux 2 release notes looks like they're stuck at glibc 2.26 https://aws.amazon.com/amazon-linux-2/release-notes/

[bergice]

More info:

the fix would be to statically link the box2d natives to the glibc version of it's host compilation environment https://discord.com/channels/348229412858101762/873537733430226964/936212923360112680

Maybe add a patch note regarding this? Other than that feel free to close this issue.

[MobiDevelop]

I assume that you tried updating glibc on the instance? I think that would be something like yum update glibc.

[bergice]

yum update glibc

Looks like it's not available for the AMI.

[MobiDevelop]

That's a bummer.