built image with openj9 jvm with tiny builder fails to run

[cmdjulian]

What happened?

I'm trying to use the buildpack in combination with the tiny stack. unfortunately it doesn't work quite right. Build succeeds but running the image fails.

• What were you attempting to do?
  Run the build image

• What did you expect to happen?
  Building AND running does work without a problem.

• What was the actual behavior? Please provide log output, if possible.

Attaching to application
application  | Setting Active Processor Count to 8
application  | WARNING: Unable to convert memory limit "max" from path "/sys/fs/cgroup/memory.max" as int: memory size "max" does not match pattern "^([\\d]+)([kmgtKMGT]?)$"
application  | Calculating JVM memory based on 10985408K available memory
application  | Calculated JVM Memory Configuration: -XX:MaxDirectMemorySize=10M -Xmx10572041K -XX:MaxMetaspaceSize=106166K -XX:ReservedCodeCacheSize=240M -Xss1M (Total Memory: 10985408K, Thread Count: 50, Loaded Class Count: 16330, Headroom: 0%)
application  | Enabling Java Native Memory Tracking
application  | Adding 128 container CA certificates to JVM truststore
application  | Spring Cloud Bindings Enabled
application  | Failed to find VM - aborting
application  | failed to open </layers/paketo-buildpacks_eclipse-openj9/jre/lib/default/libjvm.so> - reason: <libstdc++.so.6: cannot open shared object file: No such file or directory>
application exited with code 255

When using the following command, without openj9 jvm, it works to build and to run without an issue:

pack build image:test \
  --path build/libs/application.jar \
  --env BP_JVM_VERSION=11 \
  --env BPE_SPRING_PROFILES_ACTIVE=prod \
  --env BPL_SPRING_CLOUD_BINDINGS_ENABLED=true \
  --builder paketobuildpacks/builder:tiny \
  --buildpack paketo-buildpacks/java

Build Configuration

pack build image:test \
  --path build/libs/application.jar \
  --env BP_JVM_VERSION=11 \
  --env BPE_SPRING_PROFILES_ACTIVE=prod \
  --env BPL_SPRING_CLOUD_BINDINGS_ENABLED=true \
  --builder paketobuildpacks/builder:tiny \
  --buildpack paketo-buildpacks/eclipse-openj9 \
  --buildpack paketo-buildpacks/java

• What platform (pack, kpack, tekton buildpacks plugin, etc.) are you
  using? Please include a version.
  pack in version v0.22.0+git-7698938

• What buildpacks are you using? Please include versions.

  • paketo-buildpacks/[email protected]
  • paketo-buildpacks/[email protected]

• What builder are you using? If custom, can you provide the output from pack inspect-builder <builder>?
  Default tiny builder: paketobuildpacks/builder:tiny

Checklist

• I have included log output.
• The log output includes an error message.
• I have included steps for reproduction.

[dmikusa]

The tiny stack is very limited in what shared libraries are included. It appears that OpenJ9 needs some additional libraries beyond the other JVMs that we ship.

<libstdc++.so.6: cannot open shared object file: No such file or directory>

Short term, there's not a lot you could do besides make your own custom build/run images based on Tiny that includes the missing shared libraries.

The contents of that image are here. It's not that difficult to create a stack and a builder from that stack. It's more work to keep them up-to-date though, which typically requires automation.

Long term, you could open an issue against the tiny stack and request the libraries you need to be added. I can help with that process, but it can be difficult to get stuff into tiny as the intent is to keep it very small/minimal, so adding anything is typically difficult. You'd want to make a case as to why it's needed & call out how much it impacts the size of the image in the issue you open.

Hope that helps!