Red Hat NETSCAPE ENTERPRISE SERVER 6.0 - NSAPI PROGRAMMER GUIDE Manual do Utilizador descarregar pdf (Página 51)

Generating a Stack Trace for Debugging

Chapter 5 Debugging Servlets and JSPs 51

3. To send exceptions to the client in addition to the log file, set the following

parameter. If the client is a browser, exceptions are displayed in the browser.

jvm.trace=7

Setting java.compiler=NONE includes line numbers of the Java source code in the

verbose output of the log files. Setting

jvm.trace=6 or jvm.trace=7 enables

verbose output from the JSP compiler and the servlet engine. Setting

nes.jsp.enabledebug=1 makes iPlanet Web Server 6.0 generate debuggable Java

servlets from the JSPs.

Generating a Stack Trace for Debugging

You can generate a Java stack trace for debugging as described here:

http://developer.java.sun.com/developer/technicalArticles/Programming/Stacktrace/

Comment out the jvm.option=-Xrs flag (for reduced signal usage) in the

jvm12.conf file before generating the stack trace. If the -Xrs flag is used, the server

may simply dump core and restart when you send the signal to generate the trace.

For more about the

jvm12.conf file and using jvm.option, see Appendix C, “JVM

Configuration.”

Using Forte for Java to Debug Servlets and JSPs

To set up iPlanet Web Server so you can use the Forte for Java debugger, follow

these steps:

1. If you have not already done so, install the JDK version 1.2.x that iPlanet Web

Server requires as described in “What Does the Server Need to Run JSP?,” on

page 37. The specific version you need depends on your platform.

2. Install the JDK version 1.3, available here:

http://java.sun.com/j2se/1.3/

Although iPlanet Web Server uses the JDK version 1.2.x, Forte for Java requires

version 1.3.

3. Install Forte for Java, Community Edition 1.0, available here:

http://www.sun.com/forte/ffj/ce/

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Red Hat NETSCAPE ENTERPRISE SERVER 6.0 - NSAPI PROGRAMMER GUIDE Manual do Utilizador Página 51