[jbosstools-issues] [JBoss JIRA] (JBIDE-20217) JDT Debug can not connect/list VM started with suspend=y

[Rob Stryker (JIRA)]

    [ https://issues.jboss.org/browse/JBIDE-20217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13110230#comment-13110230 ] 

Rob Stryker commented on JBIDE-20217:
-------------------------------------

I've made 2 commits to fix the npe on isDebugxxx

https://github.com/jbosstools/jbosstools-server/pull/374
https://github.com/jbosstools/jbosstools-base/pull/451

One is a safety precaution in base, the other is the jvm connection in jmx view being a bit smarter and saying if the vm we're looking for no longer exists or isn't in the cache, we won't ask base if its debugable (because it doesn't exist).  

Hopefully these fix the issues, though I can't replicate at this time. I'll resolve this for now, but please re-open if its still present after respin-a. 

> JDT Debug can not connect/list VM started with suspend=y
> --------------------------------------------------------
>
>                 Key: JBIDE-20217
>                 URL: https://issues.jboss.org/browse/JBIDE-20217
>             Project: Tools (JBoss Tools)
>          Issue Type: Bug
>          Components: common/jst/core
>    Affects Versions: 4.3.0.Beta1
>            Reporter: Aslak Knutsen
>            Assignee: Rob Stryker
>            Priority: Critical
>              Labels: new_and_noteworthy
>             Fix For: 4.3.0.CR1
>
>
> Having a VM started with suspend=y cause the following error to be logged from https://github.com/jbosstools/jbosstools-base/blob/master/common/plugins/org.jboss.tools.common.jdt.debug/src/org/jboss/tools/common/jdt/debug/RemoteDebugActivator.java#L171 due to Exception thrown in ToolsCore.getJvmArgs
> Seemingly JVMStat can not connect to a suspended VM. 
> {code}
> eclipse.buildId=4.5.0.I20150603-2000
> java.version=1.8.0_45
> java.vendor=Oracle Corporation
> BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
> Command-line arguments:  -os linux -ws gtk -arch x86_64
> org.jboss.tools.common.jdt.debug
> Error
> Wed Jul 08 17:16:00 CEST 2015
> {code}
> {code}
> java.lang.reflect.InvocationTargetException
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:497)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.getJvmArgs(Tools.java:780)
> 	at org.jboss.tools.common.jdt.debug.tools.ToolsCore.getJvmArgs(ToolsCore.java:98)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getVmModelsUsingTools(RemoteDebugActivator.java:166)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getVmModel(RemoteDebugActivator.java:145)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getVmModels(RemoteDebugActivator.java:132)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getDebugModels(RemoteDebugActivator.java:193)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getDebugModels(RemoteDebugActivator.java:227)
> 	at org.jboss.tools.common.jdt.debug.ui.RemoteDebugUIActivator.discoverRemoteApplication(RemoteDebugUIActivator.java:137)
> 	at org.jboss.tools.common.jdt.debug.ui.RemoteDebugUIActivator$1.run(RemoteDebugUIActivator.java:93)
> 	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
> Caused by: sun.jvmstat.monitor.MonitorException: Could not synchronize with target
> 	at sun.jvmstat.perfdata.monitor.v2_0.PerfDataBuffer.synchWithTarget(PerfDataBuffer.java:277)
> 	at sun.jvmstat.perfdata.monitor.v2_0.PerfDataBuffer.buildMonitorMap(PerfDataBuffer.java:131)
> 	at sun.jvmstat.perfdata.monitor.PerfDataBufferImpl.findByName(PerfDataBufferImpl.java:241)
> 	at sun.jvmstat.perfdata.monitor.AbstractPerfDataBuffer.findByName(AbstractPerfDataBuffer.java:100)
> 	at sun.jvmstat.perfdata.monitor.AbstractMonitoredVm.findByName(AbstractMonitoredVm.java:85)
> 	at sun.jvmstat.monitor.MonitoredVmUtil.jvmArgs(MonitoredVmUtil.java:145)
> 	... 14 more
> Root exception:
> sun.jvmstat.monitor.MonitorException: Could not synchronize with target
> 	at sun.jvmstat.perfdata.monitor.v2_0.PerfDataBuffer.synchWithTarget(PerfDataBuffer.java:277)
> 	at sun.jvmstat.perfdata.monitor.v2_0.PerfDataBuffer.buildMonitorMap(PerfDataBuffer.java:131)
> 	at sun.jvmstat.perfdata.monitor.PerfDataBufferImpl.findByName(PerfDataBufferImpl.java:241)
> 	at sun.jvmstat.perfdata.monitor.AbstractPerfDataBuffer.findByName(AbstractPerfDataBuffer.java:100)
> 	at sun.jvmstat.perfdata.monitor.AbstractMonitoredVm.findByName(AbstractMonitoredVm.java:85)
> 	at sun.jvmstat.monitor.MonitoredVmUtil.jvmArgs(MonitoredVmUtil.java:145)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:497)
> 	at org.jboss.tools.common.jdt.debug.tools.internal.Tools.getJvmArgs(Tools.java:780)
> 	at org.jboss.tools.common.jdt.debug.tools.ToolsCore.getJvmArgs(ToolsCore.java:98)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getVmModelsUsingTools(RemoteDebugActivator.java:166)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getVmModel(RemoteDebugActivator.java:145)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getVmModels(RemoteDebugActivator.java:132)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getDebugModels(RemoteDebugActivator.java:193)
> 	at org.jboss.tools.common.jdt.debug.RemoteDebugActivator.getDebugModels(RemoteDebugActivator.java:227)
> 	at org.jboss.tools.common.jdt.debug.ui.RemoteDebugUIActivator.discoverRemoteApplication(RemoteDebugUIActivator.java:137)
> 	at org.jboss.tools.common.jdt.debug.ui.RemoteDebugUIActivator$1.run(RemoteDebugUIActivator.java:93)
> 	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
> {code}



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