FULL PRODUCT VERSION :
JDK-8u45

ADDITIONAL OS VERSION INFORMATION :
$ uname -a
SunOS telling 5.11 11.2 i86pc i386 i86pc

but the problem is generic.

EXTRA RELEVANT SYSTEM CONFIGURATION :
Not applicable.

A DESCRIPTION OF THE PROBLEM :
Looking at

    http://hg.openjdk.java.net/jdk8u/jdk8u-dev/jdk/file/fddcb008fd1d/src/solaris/native/java/net/Inet6AddressImpl.c

the comment is

    /*
     * Class: java_net_Inet6AddressImpl
     * Method: getHostByAddr
     * Signature: (I)Ljava/lang/String;
     */
    JNIEXPORT jstring JNICALL
    Java_java_net_Inet6AddressImpl_getHostByAddr(JNIEnv *env, jobject this,
                                                jbyteArray addrArray)

and the "Signature" line is incorrect. The method takes a "byte[]" rather than a "int".

The method being implemented is in java.net.Inet6AddressImpl

  public native String getHostByAddr(byte[] addr) throws UnknownHostException;

which takes a "byte[]"..

Java_java_net_Inet4AddressImpl_getHostByAddr has the same problem. I have not looked at the comments on any of the other JNI implementations.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Use the source!


REPRODUCIBILITY :
This bug can be reproduced always.