FULL PRODUCT VERSION :
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) Client VM (build 25.91-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 10.0.10586]

A DESCRIPTION OF THE PROBLEM :
class loading via javaws JNLP is broken in javaws (irrespective of the selected JRE version by javaws!).
the broken javaws versions are not using locally cached files.

broken versions:
Java Web Start 11.91.2.14
Java Web Start 11.102.2.04 x86

working version:
Java Web Start 11.77.2.03

REGRESSION. Last worked in version 8u77

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) Client VM (build 25.77-b03, mixed mode, sharing)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
enable java console

launch
javaws http://kursweb.ch/webstart/kursweb.jnlp

hit v to dump stack trace, app spends 99% on com.sun.jnlp.JNLPClassLoader.loadClass


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
jar files are downloaded, app starts and classes are loaded directly from the jar cache
app starts with older version within 10 sec
ACTUAL -
extreme amount of requests towards the webserver to load each class

app starts only after more than 3 min

ERROR MESSAGES/STACK TRACES THAT OCCUR :
the following stack traces are just examples where the application spends most time

...
at com.sun.deploy.security.DeployURLClassPath$UrlLoader.findResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.findResource(Unknown Source)
at java.net.URLClassLoader$2.run(Unknown Source)
at java.net.URLClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.findResource(Unknown Source)
at java.lang.ClassLoader.getResource(Unknown Source)
...



"javawsApplicationMain" #35 prio=5 os_prio=0 tid=0x2883fc00 nid=0x1026c runnable [0x2a8ec000]
   java.lang.Thread.State: RUNNABLE
at java.util.zip.Inflater.reset(Native Method)
at java.util.zip.Inflater.reset(Unknown Source)
- locked <0x058e26e8> (a java.util.zip.ZStreamRef)
at java.util.zip.ZipFile.releaseInflater(Unknown Source)
at java.util.zip.ZipFile.access$100(Unknown Source)
at java.util.zip.ZipFile$ZipFileInflaterInputStream.close(Unknown Source)
at java.util.jar.JarVerifier$VerifierStream.close(Unknown Source)
at com.sun.deploy.security.JarVerifier.readAndMaybeSaveStreamTo(Unknown Source)
at com.sun.deploy.security.JarVerifier.authenticateJarEntry(Unknown Source)
at com.sun.deploy.security.EnhancedJarVerifier.validate(Unknown Source)
at com.sun.deploy.cache.CacheEntry$3.run(Unknown Source)
at com.sun.deploy.cache.CacheEntry$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.cache.CacheEntry.getJarSigningData(Unknown Source)
- locked <0x0f9b2360> (a com.sun.deploy.cache.CacheEntry)
at com.sun.deploy.cache.CachedJarFile.getSigningData(Unknown Source)
- locked <0x058e01b8> (a com.sun.deploy.cache.CachedJarFile)
at com.sun.deploy.cache.CachedJarFile.getCodeSources(Unknown Source)
- locked <0x058e01b8> (a com.sun.deploy.cache.CachedJarFile)
at com.sun.deploy.cache.DeployCacheJarAccessImpl.getCodeSources(Unknown Source)
at com.sun.deploy.security.CPCallbackHandler$ParentCallback.openClassPathElement(Unknown Source)
- locked <0x0f849850> (a com.sun.deploy.security.CPCallbackHandler$ParentCallback)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.getJarFile(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.access$800(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.ensureOpen(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$JarLoader.<init>(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getLoader(Unknown Source)
- locked <0x0f80c5e0> (a com.sun.deploy.security.DeployURLClassPath)
at com.sun.deploy.security.DeployURLClassPath.findResource(Unknown Source)
at java.net.URLClassLoader$2.run(Unknown Source)
at java.net.URLClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.findResource(Unknown Source)
at java.lang.ClassLoader.getResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.getResource(Unknown Source)
at java.lang.ClassLoader.getResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.getResource(Unknown Source)
at org.apache.log4j.helpers.Loader.getResource(Loader.java:87)
at org.apache.log4j.LogManager.<clinit>(LogManager.java:103)
at org.apache.log4j.Logger.getLogger(Logger.java:116)
at kurs.util.KursUtil.<clinit>(KursUtil.java:32)
at Main.<clinit>(Main.java:30)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)



"javawsApplicationMain" #35 prio=5 os_prio=0 tid=0x2883fc00 nid=0x1026c runnable [0x2a8eb000]
   java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at sun.security.ssl.InputRecord.readFully(Unknown Source)
at sun.security.ssl.InputRecord.read(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
- locked <0x04fba5b8> (a java.lang.Object)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
- locked <0x04fba588> (a java.lang.Object)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
- locked <0x04fad560> (a sun.net.www.protocol.https.DelegateHttpsURLConnection)
at sun.net.www.protocol.http.HttpURLConnection.access$200(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$9.run(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$9.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessController.doPrivilegedWithCombiner(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
- locked <0x04fad560> (a sun.net.www.protocol.https.DelegateHttpsURLConnection)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
- locked <0x04fad4e8> (a sun.net.www.protocol.https.HttpsURLConnectionImpl)
at com.sun.deploy.security.DeployURLClassPath$UrlLoader.getResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.getResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.getResourceAsResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.getResourceAsResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassLoader.getResourceAsStream(Unknown Source)
at java.util.ResourceBundle$Control$1.run(Unknown Source)
at java.util.ResourceBundle$Control$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.ResourceBundle$Control.newBundle(Unknown Source)
at java.util.ResourceBundle.loadBundle(Unknown Source)
at java.util.ResourceBundle.findBundle(Unknown Source)
at java.util.ResourceBundle.getBundleImpl(Unknown Source)
at java.util.ResourceBundle.getBundle(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getBundleWithEnDefault(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getBundleForLocale(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.getBundle(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.getBundle(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getBundle(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getTextMessage(Unknown Source)
at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.raw.RawStore$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.store.raw.RawStore.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.access.RAMAccessManager$5.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.store.access.RAMAccessManager.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
at org.apache.derby.impl.db.BasicDatabase$5.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.db.BasicDatabase.bootServiceModule(Unknown Source)
at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection$4.run(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.jdbc.EmbedConnection.startPersistentService(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
at org.apache.derby.jdbc.InternalDriver$1.run(Unknown Source)
at org.apache.derby.jdbc.InternalDriver$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
at org.apache.derby.jdbc.AutoloadedDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at kurs.db.DAO.initDb(DAO.java:804)
at Main._main(Main.java:172)
at Main.main(Main.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)


"javawsApplicationMain" #35 prio=5 os_prio=0 tid=0x2850a800 nid=0x1ec0c runnable [0x2a47a000]
   java.lang.Thread.State: RUNNABLE
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
- locked <0x055a1128> (a java.net.DualStackPlainSocketImpl)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
- locked <0x055a0be8> (a sun.net.www.protocol.https.HttpsClient)
at sun.net.www.protocol.https.HttpsClient.&lt;init&gt;(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessController.doPrivilegedWithCombiner(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
- locked <0x0559ee18> (a sun.net.www.protocol.https.DelegateHttpsURLConnection)
at sun.net.www.protocol.http.HttpURLConnection.access$200(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$9.run(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$9.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessController.doPrivilegedWithCombiner(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
- locked <0x0559ee18> (a sun.net.www.protocol.https.DelegateHttpsURLConnection)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath$UrlLoader.findResource(Unknown Source)
at com.sun.deploy.security.DeployURLClassPath.findResource(Unknown Source)
at java.net.URLClassLoader$2.run(Unknown Source)
at java.net.URLClassLoader$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.findResource(Unknown Source)
at java.lang.ClassLoader.getResource(Unknown Source)
at com.sun.jnlp.JNLPClassLoader.getResource(Unknown Source)
at java.net.URLClassLoader.getResourceAsStream(Unknown Source)
at com.sun.deploy.security.DeployURLClassLoader.getResourceAsStream(Unknown Source)
at java.util.ResourceBundle$Control$1.run(Unknown Source)
at java.util.ResourceBundle$Control$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.util.ResourceBundle$Control.newBundle(Unknown Source)
at java.util.ResourceBundle.loadBundle(Unknown Source)
at java.util.ResourceBundle.findBundle(Unknown Source)
at java.util.ResourceBundle.getBundleImpl(Unknown Source)
at java.util.ResourceBundle.getBundle(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getBundleWithEnDefault(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getBundleForLocale(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.getBundle(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.getBundle(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getBundle(Unknown Source)
at org.apache.derby.iapi.services.i18n.MessageService.getTextMessage(Unknown Source)
at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.raw.RawStore$6.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.store.raw.RawStore.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.raw.RawStore.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.access.RAMAccessManager$5.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.store.access.RAMAccessManager.bootServiceModule(Unknown Source)
at org.apache.derby.impl.store.access.RAMAccessManager.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(Unknown Source)
at org.apache.derby.impl.services.monitor.FileMonitor.startModule(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Unknown Source)
at org.apache.derby.impl.db.BasicDatabase$5.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.db.BasicDatabase.bootServiceModule(Unknown Source)
at org.apache.derby.impl.db.BasicDatabase.bootStore(Unknown Source)
at org.apache.derby.impl.db.BasicDatabase.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.boot(Unknown Source)
at org.apache.derby.impl.services.monitor.TopService.bootModule(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(Unknown Source)
at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(Unknown Source)
at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection$4.run(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.impl.jdbc.EmbedConnection.startPersistentService(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.<init>(Unknown Source)
at org.apache.derby.jdbc.InternalDriver$1.run(Unknown Source)
at org.apache.derby.jdbc.InternalDriver$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.derby.jdbc.InternalDriver.getNewEmbedConnection(Unknown Source)
at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
at org.apache.derby.jdbc.InternalDriver.connect(Unknown Source)
at org.apache.derby.jdbc.AutoloadedDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at kurs.db.DAO.initDb(DAO.java:804)
at Main._main(Main.java:172)
at Main.main(Main.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
create an application with many jar dependencies, sign all jars, upload to webserver, launch jnlp file, see how classes are loaded via a jar url instead of going to the local disk cache. sorry, can't be reproduced easier
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
using an older version javaws - even with the 1.8.0_91 JRE - solves the problem

not accepted by the customers