GAE - Standard Env - java.lang.UnsatisfiedLinkError even after specifying java.library.path

[Praveenkumar Venkatesan]

I'm trying to use opencv in my app. opencv has native libraries that need to be loaded.

I have set java.library.path in order to load them using System.loadLibrary. So the app picks up the library i want to load from the java.library.path specified but the native library has internal dependencies and they are not getting picked.

java.library.path is set to /tmp/dependencies

Error from the logs:

Caused by: java.lang.UnsatisfiedLinkError: /tmp/dependencies/libopencv_java440.so: libopencv_ml.so.4.4: cannot open shared object file: No such file or directory 

libopencv_ml is present under /tmp/dependencies. even tho java.library.path is specified, its not picking it up. I think I need to set LD_LIBRARY_PATH but not sure if I can do this in the standard environment.

Is this something GAE supports? Can I load native libraries in GAE?

Thanks,

Praveen

[Praveenkumar Venkatesan]

i was able to resolve this issue by running in the flex env.

[Katayoon (Cloud Platform Support)]

Hi Praveenkumar,

Happy to hear that the issue is resolved. As you clearly denoted and explained in this documentation, using the standard environment, your application runs inside of a sandbox. Hence, your application can not write to disk or use non-whitelisted binary libraries.