Hot deploy and fast reload not working

[ManojTauro]

Hi,
I wrote a gradle script to build my project which is multi-module project.
One is service layer which will be packaged into a jar and copied into WEB-INF/lib directory.
I tried to add Hot deploy feature through Gretty plugin which is not working as expected.

When I change source code in my action classes I am getting following error.
Gretty is not able to access file change event.

Please help.
Thanks.

org.akhikhl.gretty.JettyScannerManager$1@73ddf71a failed on '[D:\Manoj\Workspaces\GradleDealPro\DealPro\web\src\com\aurionpro\dealpro\web\transactions\action\RETPreStageListAction.java]
java.lang.IllegalAccessError: tried to access method org.akhikhl.gretty.scanner.BaseScannerManager.scanFilesChanged(Ljava/util/Collection;)V from class org.akhikhl.gretty.JettyScannerManager$1
at org.akhikhl.gretty.JettyScannerManager$1.filesChanged(JettyScannerManager.groovy:33)
at org.eclipse.jetty.util.Scanner.reportBulkChanges(Scanner.java:691)
at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:551)
at org.eclipse.jetty.util.Scanner.scan(Scanner.java:403)
at org.eclipse.jetty.util.Scanner$1.run(Scanner.java:353)
at java.util.TimerThread.mainLoop(Timer.java:555)
at java.util.TimerThread.run(Timer.java:505)