java.lang.ClassNotFoundException: org.eclipse.mylyn.internal.jira.core.model.JiraFilter
   at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:315)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:330)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:250)
Caused: java.lang.ClassNotFoundException: org.eclipse.mylyn.internal.jira.core.model.JiraFilter starting from ModuleCL@1241647f[org.netbeans.modules.jira] with possible defining loaders null and declared parents [ModuleCL@3b46ad8b[org.netbeans.modules.autoupdate.services], ModuleCL@12910b0b[org.netbeans.libs.osgi], ModuleCL@1d3c66d8[org.netbeans.libs.bugtracking], ModuleCL@7c82a13a[org.jdesktop.layout], ModuleCL@7d627b8b[org.netbeans.libs.commons_logging], ModuleCL@7593c366[org.openide.windows], ModuleCL@b6e1782[org.netbeans.api.progress], ModuleCL@72b398da[org.netbeans.modules.bugtracking], ModuleCL@3a2cd728[org.openide.awt], ModuleCL@6e05b24c[org.netbeans.modules.options.api], ModuleCL@314585[org.netbeans.modules.spellchecker.apimodule], ModuleCL@2cbc9673[org.openide.loaders], org.netbeans.MainImpl$BootClassLoader@61b383e9, ModuleCL@7c2479a4[org.openide.dialogs], ModuleCL@215200be[org.openide.nodes], ModuleCL@450f8ee4[org.netbeans.modules.diff], ModuleCL@622209db[org.netbeans.libs.jira]]
   at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:261)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:250)
   at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:398)
Caused: java.lang.NoClassDefFoundError: org/eclipse/mylyn/internal/jira/core/model/JiraFilter
   at org.netbeans.modules.jira.issue.JiraIssueProvider.initializeIssues(JiraIssueProvider.java:375)
   at org.netbeans.modules.jira.issue.JiraIssueProvider.access$300(JiraIssueProvider.java:93)
   at org.netbeans.modules.jira.issue.JiraIssueProvider$1.run(JiraIssueProvider.java:310)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NoClassDefFoundError: org/eclipse/mylyn/internal/jira/core/model/JiraFilter
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:368)
   at org.netbeans.modules.jira.issue.JiraIssueProvider.reloadAsync(JiraIssueProvider.java:307)
   at org.netbeans.modules.jira.issue.JiraIssueProvider.<init>(JiraIssueProvider.java:119)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance0(NativeConstructorAccessorImpl.java:0)
   at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
   at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
   at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
   at java.lang.Class.newInstance0(Class.java:355)
   at java.lang.Class.newInstance(Class.java:308)
   at org.openide.util.lookup.implspi.SharedClassObjectBridge.newInstance(SharedClassObjectBridge.java:61)
   at org.openide.util.lookup.MetaInfServicesLookup$P.getInstance(MetaInfServicesLookup.java:469)
   at org.openide.util.lookup.AbstractLookup$R.allInstances(AbstractLookup.java:999)
   at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:548)
   at org.openide.util.lookup.ProxyLookup$R.allInstances(ProxyLookup.java:488)
   at org.openide.util.Lookup.lookupAll(Lookup.java:260)
   at org.netbeans.modules.bugtracking.tasklist.TaskListProvider.setScope(TaskListProvider.java:130)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl.attachPushScanners(TaskManagerImpl.java:205)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl.doObserve(TaskManagerImpl.java:162)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl.access$000(TaskManagerImpl.java:73)
   at org.netbeans.modules.tasklist.impl.TaskManagerImpl$1.run(TaskManagerImpl.java:106)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1369)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1907)