May 12, 2016 12:24:18 AM hudson.init.impl.InstallUncaughtExceptionHandler$DefaultUncaughtExceptionHandler uncaughtException
SEVERE: A thread (Download metadata thread/57) died unexpectedly due to an uncaught exception, this may leave your Jenkins in a bad way and is usually indicative of a bug in the code.
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
	at java.util.ArrayList.get(ArrayList.java:429)
	at jenkins.util.JSONSignatureValidator.verifySignature(JSONSignatureValidator.java:85)
	at hudson.model.UpdateSite.verifySignature(UpdateSite.java:224)
	at hudson.model.UpdateSite.updateData(UpdateSite.java:203)
	at hudson.model.UpdateSite.updateDirectlyNow(UpdateSite.java:175)
	at hudson.PluginManager.doCheckUpdatesServer(PluginManager.java:1408)
	at jenkins.model.DownloadSettings$DailyCheck.execute(DownloadSettings.java:121)
	at hudson.model.AsyncPeriodicWork$1.run(AsyncPeriodicWork.java:99)
	at java.lang.Thread.run(Thread.java:745)