Android : java.lang.UnsatisfiedLinkError: findLibrary returned null - happens RARELY

* Please don't answer about basic JNI and shared library tutorial. It happens RARELY!!

I have the similar issue with findLibrary returned null happened sometimes. But it happens rarely.

java.lang.UnsatisfiedLinkError: Couldn't load xxxx: findLibrary returned null

I've never seen it on my devices - 12 devices with various android versions. It shows up only on crash report.

I think it could be a fault of package installer on Android because I've even seen some crash reports saying FileNotFoundException on a xml file contained in apk obviously!

But I'm not sure. Is there anyone who have correct answer?