[jbosstools-issues] [JBoss JIRA] (JBDS-4180) ClassNotFoundException thrown on devstudio start up

[Rob Stryker (JIRA)]

    [ https://issues.jboss.org/browse/JBDS-4180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13324504#comment-13324504 ] 

Rob Stryker commented on JBDS-4180:
-----------------------------------

I think the situation here is more complex than on first sight. 

I can't replicate it, but, looking at Tools.java (in org.jboss.tools.common.jdt.debug) will try to load a jdk's tools.jar from either the currently running java, or, an appropriate IVMInstall which are declared in the eclipse preferences. 

So if the workspace environment was kinda wonky, it could have us trying to load a tools.jar from a jre (i don't think so?) or it could have added tools.jar to the currently running classpath again despite it already being on the cp... or some other weird wonky stuff. 

I've traced through and analyzed the code, and also tried to replicate, but nothing obvious sticks out and no replication.  :( 

> ClassNotFoundException thrown on devstudio start up
> ---------------------------------------------------
>
>                 Key: JBDS-4180
>                 URL: https://issues.jboss.org/browse/JBDS-4180
>             Project: Red Hat JBoss Developer Studio (devstudio)
>          Issue Type: Bug
>          Components: foundation, upstream
>    Affects Versions: 10.2.0.GA
>         Environment: Fedora 24,
> openjdk version "1.8.0_102"
> OpenJDK Runtime Environment (build 1.8.0_102-b14)
>            Reporter: Marián Labuda
>            Assignee: Rob Stryker
>             Fix For: 10.x
>
>
> When starting latest DevStudio 10.2.0.GA (build ID GA-v20161116-0039-B6472) I get following error in console output
> {code}
> SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
> Noop constructor
> java.lang.ClassNotFoundException: sun.jvmstat.monitor.MonitoredHost
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> 	at org.eclipse.osgi.internal.framework.ContextFinder.loadClass(ContextFinder.java:132)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.invokeGetMonitoredHost(Tools.java:513)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.validateClassPathAndLibraryPath(Tools.java:365)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.reset(Tools.java:115)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.<init>(Tools.java:82)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.getInstance(Tools.java:73)
> 	at org.jboss.tools.common.jdt.debug.tools.ToolsCore.getActiveProcessIds(ToolsCore.java:179)
> 	at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler.updatesActiveJvms(JvmAttachHandler.java:100)
> 	at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler$1.run(JvmAttachHandler.java:78)
> 	at java.util.TimerThread.mainLoop(Timer.java:555)
> 	at java.util.TimerThread.run(Timer.java:505)
> java.lang.ClassNotFoundException: sun.jvmstat.monitor.MonitoredHost
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> 	at org.eclipse.osgi.internal.framework.ContextFinder.loadClass(ContextFinder.java:132)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.invokeGetMonitoredHost(Tools.java:513)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.invokeActiveVms(Tools.java:525)
> 	at org.jboss.tools.common.jdt.debug.tools.ToolsCore.getActiveProcessIds(ToolsCore.java:179)
> 	at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler.updatesActiveJvms(JvmAttachHandler.java:100)
> 	at org.jboss.tools.jmx.jvmmonitor.internal.tools.JvmAttachHandler$1.run(JvmAttachHandler.java:78)
> 	at java.util.TimerThread.mainLoop(Timer.java:555)
> 	at java.util.TimerThread.run(Timer.java:505)
> {code}
> problem is with openjdk version. With the lates 1.8.0_111 it works.



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