NoClassDefFoundError using sun.misc.Unsafe

Asked Jul 21 '14 at 23:10

Active Jul 22 '14 at 00:07

Viewed 952 times

I get the following exception when calling Unsafe.putInt:

A needed class was not found. This could be due to an error in your runpath. Missing class: java/lang/InvalidClassException
java.lang.NoClassDefFoundError: java/lang/InvalidClassException

Unsafe lives in rt.jar, but I am unable to find java/lang/InvalidClassException, only java.io.InvalidClassException.

How do I resolve this exception? (if it matters, I'm using jdk 1.7u55)

Thank you for any help.

Update: this is caused by a call to the native method unsafe.arrayBaseOffset. I can work around it by using the static variables: ARRAY_?_BASE_OFFSET, but I don't know why.

edited Jul 22 '14 at 00:07

asked Jul 21 '14 at 23:10

kcwill2

Are you having this problem at compile time or runtime? – Brett Okken Jul 22 '14 at 00:13
Could this be your issue: http://stackoverflow.com/questions/4065401/using-internal-sun-classes-with-javac/4070685#4070685 – Brett Okken Jul 22 '14 at 00:19
Look at your error message. That's not the same class. – chrylis -cautiouslyoptimistic- Jul 22 '14 at 01:10

NoClassDefFoundError using sun.misc.Unsafe

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