[javac] import sun.misc.Signal;
    [javac]                ^
    [javac] import sun.misc.SignalHandler;
    [javac]                ^
    [javac] public class ShutdownSignalHandler implements SignalHandler {
    [javac]                                               ^
    [javac]     private SignalHandler oldHandler = null;
    [javac]             ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:62: warning: Signal is internal proprietary API and may be removed in a future release
    [javac]             Signal sigTerm = new Signal(SIGTERM);
    [javac]             ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:62: warning: Signal is internal proprietary API and may be removed in a future release
    [javac]             Signal sigTerm = new Signal(SIGTERM);
    [javac]                                  ^
    [javac]             termInstance.oldHandler = Signal.handle(sigTerm, termInstance);
    [javac]                                       ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:70: warning: Signal is internal proprietary API and may be removed in a future release
    [javac]             Signal sigInt = new Signal(SIGINT);
    [javac]             ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:70: warning: Signal is internal proprietary API and may be removed in a future release
    [javac]             Signal sigInt = new Signal(SIGINT);
    [javac]                                 ^
    [javac]             intInstance.oldHandler = Signal.handle(sigInt, intInstance);
    [javac]                                      ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:78: warning: Signal is internal proprietary API and may be removed in a future release
    [javac]             Signal sigHup = new Signal(SIGHUP);
    [javac]             ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:78: warning: Signal is internal proprietary API and may be removed in a future release
    [javac]             Signal sigHup = new Signal(SIGHUP);
    [javac]                                 ^
    [javac]             hupInstance.oldHandler = Signal.handle(sigHup, hupInstance);
    [javac]                                      ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:88: warning: Signal is internal proprietary API and may be removed in a future release
    [javac]     public void handle(Signal signal) {
    [javac]                        ^
    [javac] /jenkins/jenkins/workspaces/Active_Dev_Integration_20-3/134/sw/syssw/smc/java/NodeHealthCalculations/src/gov/nasa/lcs/smc/nodehealthcalculations/ShutdownSignalHandler.java:100: warning: SignalHandler is internal proprietary API and may be removed in a future release