How to resolve “com.sun.deploy.net.JARSigningException: Found unsigned entry in resource:”

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  •   14/02/2014 3:35 PM
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If, in your .jnlp file you are referencing some signed jars, sometimes the verification fails miserably with the following stacktrace:

com.sun.deploy.net.JARSigningException:Foundunsigned entry in resource: 
	at com.sun.javaws.security.SigningInfo.getCommonCodeSignersForJar(UnknownSource)
	at com.sun.javaws.security.SigningInfo.check(UnknownSource)
	at com.sun.javaws.LaunchDownload.checkSignedResourcesHelper(UnknownSource)
	at com.sun.javaws.LaunchDownload.checkSignedResources(UnknownSource)
	at com.sun.javaws.Launcher.prepareResources(UnknownSource)
	at com.sun.javaws.Launcher.prepareAllResources(UnknownSource)
	at com.sun.javaws.Launcher.prepareToLaunch(UnknownSource)
	at com.sun.javaws.Launcher.prepareToLaunch(UnknownSource)
	at com.sun.javaws.Launcher.launch(UnknownSource)
	at com.sun.javaws.Main.launchApp(UnknownSource)
	at com.sun.javaws.Main.continueInSecureThread(UnknownSource)
	at com.sun.javaws.Main$1.run(UnknownSource)
	at java.lang.Thread.run(UnknownSource)

If you are 100% sure that your jars are correctly signed, check if your JRE setup have “Keep temporary files on my computer” option disabled.

So if you are on Windows/MacOS: Control Panel -> Java and then:

 

Please make sure "“Keep temporary files on my computer" are UNTICKED.

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