perfSONAR User Q&A and Other Discussion

[Jianan Wang <>]

Thanks for pointing out the issue, and I believe as well that it would 
be more convenient if more specific error could be displayed in log file!:-)


On 4/1/2014 3:33 PM, Andrew Lake wrote:
> Hi,
>
> At lines 329 and 330 make IntraPacketLatency and IntraPacketLatencyRev just 
> PacketLatency and PacketLatencyRev respectively. That should be the only 
> change you need after that. I have updated the code in the maddash trunk to 
> print a better error message in this case since a NullPointerException isn't 
> very helpful. This change will be included next time we cut an RPM. Thanks 
> for reporting it.
>
> Andy
>
>
>
> On Apr 1, 2014, at 2:44 PM, Andrew Lake 
> <>
>  wrote:
>
> > Hi,
> >
> > Can you send your maddash.yaml file? Likely some required field is missing.
> >
> > Thanks,
> > Andy
> >
> >
> >
> > On Apr 1, 2014, at 2:04 PM, Jianan Wang 
> > <>
> >  wrote:
> >
> > > Hi everyone,
> > >
> > > I have a question about maddash-webUI configuration. After I finished the 
> > > scripts of maddash.yaml and config.json and ran the service, maddash stopped 
> > > working and have the following output from the log file:
> > >
> > > /var/log/maddash/maddash-server.netlogger.log:
> > > level=INFO ts=2014-04-01T05:59:20.139708Z event=maddash.init.start 
> > > guid=0cbb946e-4bb1-47b9-9fa1-71482afaaa73
> > > level=ERROR ts=2014-04-01T05:59:22.725039Z event=maddash.init.end 
> > > guid=0cbb946e-4bb1-47b9-9fa1-71482afaaa73 status=-1
> > >
> > >
> > > /var/log/maddash/maddash-server.out:
> > > Initialization error: null
> > > java.lang.NullPointerException
> > >    at net.es.maddash.ConfigLoader.load(ConfigLoader.java:296)
> > >    at net.es.maddash.MaDDashGlobals.<init>(MaDDashGlobals.java:230)
> > >    at net.es.maddash.MaDDashGlobals.getInstance(MaDDashGlobals.java:462)
> > >    at net.es.maddash.Invoker.main(Invoker.java:55)
> > >    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> > >    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl
> > > .java:57)
> > >    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcce
> > > ssorImpl.java:43)
> > >    at java.lang.reflect.Method.invoke(Method.java:622)
> > >    at com.simontuffs.onejar.Boot.run(Boot.java:306)
> > >    at com.simontuffs.onejar.Boot.main(Boot.java:159)
> > >
> > >
> > > It seems the problem is in the MaDDashGlobals initialization and 
> > > getInstance() in the Invoker.java, but I'm not sure how to solve it.
> > >
> > >        ....
> > >         try {
> > >            netlogger.info(netLog.start("maddash.init"));
> > >            MaDDashGlobals.init(configFile);
> > >            globals = MaDDashGlobals.getInstance();
> > >            netlogger.info(netLog.end("maddash.init"));
> > >
> > >            ...
> > >
> > > Any suggestion is appreciated!
> > >
> > > Thanks.
> > >
> > > --
> > > Jianan Wang
> > > Department of Electrical and Computer Engineering, Duke University
> > > Department of Optical Engineering, ZJU  Information Engineering
> > > Qizhen Leadership School, ZJU
> > > Tel:(1) 919-937-4582
> > > Email: