Interruptible I/O has been purged from the JVM - see JDK-4385444 and most recently JDK-8036128.

However we just spotted this lurking fragment in os_solaris.cpp os::Solaris::set_signal_handler:

  } else if (sig == os::Solaris::SIGinterrupt()) {
    // Interruptible i/o requires SA_RESTART cleared so EINTR
    // is returned instead of restarting system calls
    sigemptyset(&sigAct.sa_mask);
    sigAct.sa_handler = NULL;
    sigAct.sa_flags = SA_SIGINFO;
    sigAct.sa_sigaction = sigINTRHandler;
}

There is no reason to not specify SA_RESTART - particularly as we never even generate a signal for "interruption" any more. It may be that the whole use of SIGinterrupt can be removed.