[news.eclipse.tptp] Re: Profiling application plug-ins that use Log4j

[Robert Enyedi <renyedi@xxxxxxxxx>]

Just for the record, I reported the bug and it does not show up in the 
latest TPTP 4.4.1 development builds. See this bug report: 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=201406

Robert Enyedi wrote:
> Sorry, I forgot to specify my system setup:
> - Eclipse 3.3
> - TPTP 4.4 (latest from the Europa discovery site)
> - both JDK 1.6.0_02 and JDK 1.5.0_12
>
> Regards,
> Robert
>
> Robert Enyedi wrote:
> > Hi,
> >
> > I'm trying to profile an Eclipse command line application plug-in that 
> > uses Log4j for logging. I encountered the following issue first in a 
> > larger application but I narrowed it down to a small plugin (see the 
> > attachment).
> >
> > The attached plugin does the following:
> > - extends the org.eclipse.core.runtime.applications extension point 
> > and provides an application implementation 
> > (tptptestplugin.TptpTestApplication class);
> > - declares a dependency to the org.apache.log4j plugin (the results 
> > are also the same if the log4j JAR is bundled inside the plugin);
> > - the application implementation instantiates a Log4j logger and tries 
> > to log a message.
> >
> > The application executes as expected. However, when trying to profile 
> > it, the following stack trace is dumped:
> >
> > <code>
> > log4j:ERROR Could not instantiate class 
> > [org.eclipse.hyades.logging.log4j.XmlLayout].
> > java.lang.ClassNotFoundException: 
> > org.eclipse.hyades.logging.log4j.XmlLayout
> >     at java.lang.ClassLoader.findClass(Unknown Source)
> >     at java.lang.ClassLoader.loadClass(Unknown Source)
> >     at java.lang.ClassLoader.loadClass(Unknown Source)
> >     at 
> > org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:429) 
> >
> >     at 
> > org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:369) 
> >
> >     at 
> > org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:357) 
> >
> >     at 
> > org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83) 
> >
> >     at java.lang.ClassLoader.loadClass(Unknown Source)
> >     at java.lang.ClassLoader.loadClassInternal(Unknown Source)
> >     at java.lang.Class.forName0(Native Method)
> >     at java.lang.Class.forName(Unknown Source)
> >     at org.apache.log4j.helpers.Loader.loadClass(Loader.java:178)
> >     at 
> > org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:317) 
> >
> >     at 
> > org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:120) 
> >
> >     at 
> > org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:641) 
> >
> >     at 
> > org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612) 
> >
> >     at 
> > org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:509) 
> >
> >     at 
> > org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:415) 
> >
> >     at 
> > org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:441) 
> >
> >     at 
> > org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:468) 
> >
> >     at org.apache.log4j.LogManager.<clinit>(LogManager.java:122)
> >     at org.apache.log4j.Logger.getLogger(Logger.java:117)
> >     at 
> > tptptestplugin.TptpTestApplication.<clinit>(TptpTestApplication.java:17)
> > </code>
> >
> > Does anyone have an idea about what I am doing wrong? Could this be a 
> > TPTP profiler bug?
> >
> > Thanks,
> > Robert