The HomeTracer is my btrace script:
import com.sun.btrace.annotations.*;
import static com.sun.btrace.BTraceUtils.*;
@BTrace
public class HomeTracer {
@TLS
static long indexStartTime;
@OnMethod(clazz = "com.test.HomeController", method = "index", location
= @Location(value = Kind.ENTRY)) public static void onEntryIndex() {
indexStartTime = timeNanos();
}
@OnMethod(clazz = "com.test.HomeController", method = "index", location
= @Location(value = Kind.RETURN))
public static void onExitIndex() {
print(strcat("home.index ns", str((timeNanos() - indexStartTime))));
}
}
After the btrace attched to the jvm ,resin will output the following
exception stacktrace when I visi http://localhost:8080/home.
The same btrace script runs well at the Resin 4.0.
Maybe the classloader of resin has different behavior between 3.1.8 and
4.0?
org.springframework.web.util.NestedServletException: Handler processing
failed; nested exception is java.lang.NoClassDefFoundError: HomeTracer$0
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:839)
at
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:114)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
at
com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
Caused by: java.lang.NoClassDefFoundError: HomeTracer$0
at
com.test.HomeController.$btrace$HomeTracer$0$onEntryIndex(HomeController.java)
at com.test.HomeController.index(HomeController.java)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)
at
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
... 18 more
Caused by: java.lang.ClassNotFoundException: HomeTracer$0 in
EnvironmentClassLoader[web-app:http://localhost:8080]
at
com.caucho.loader.DynamicClassLoader.loadClass(DynamicClassLoader.java:1224)
at
com.caucho.loader.DynamicClassLoader.loadClass(DynamicClassLoader.java:1203)
On Wed, Mar 30, 2011 at 12:32 PM, Kirk <[email protected]> wrote:
>
> On Mar 29, 2011, at 10:52 PM, Jaroslav Bachorik wrote:
>
> > Which class can not be found? A BTrace internal class or a custom type
> > you use in the BTrace script?
>
> I suspect that BTrace is picking up the system classloader instead of the
> context classloader but I need to see the stacktrace to confirm.
>
> Kirk
>
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