Interruptible I/O on Solaris has been highly problematic and the long standing plan has been to remove it from the JDK.
In JDK6 the VM option UseVMInterruptibleIO was introduced to allow developers/customers experiment with disabling it.
In JDK7 the default value of UseVMInterruptibleIO was changed to be "false" so that it is disabled by default.
For JDK8 it is finally time to remove the feature. This bug tracks changing the native in src/share/native/java/io and src/solaris/native/java/io so that the system calls are used directly rather than going through the JVM_* functions. Updating of the networking code will be done via a different bug.