I am running merlin 3.2.5 with java 1.3.1. At the end of the merlin
INSTALL.TXT file, there is a note for java 1.3.1 users, saying you need
to install the xml parsers that 1.3.1 lacks. (BTW, I think there is a
deadly typo in that section: "java.ext.dir" seems incorrect;
"java.ext.dirs" instead.) I have correctly installed the three xml jar
files to my jre/lib/ext directory. I also wrote a short java program to
prove that java is happy about the jars being "findable" in that
location.
However, when I try to execute the merlin "hello" tutorial (as below) I
get an error with merlin being unable to find a class, which I know is
correctly installed in the jre/lib/ext directory.
I can't figure out why merlin would see /ext differently than java. Any
ideas?
-broc
<merlin_fails_to_find_jars>
/home/pulsar/bseib/merlin/tutorial/hello$ merlin target/classes -execute
Starting Default Unix script
Starting Merlin 3.2.4.
====================
Platform: FreeBSD
Java Home: /usr/local/jdk
Merlin Home: /opt/merlin
Security policy: /opt/merlin/bin/security.policy
JVM Options:
Bootstrap JAR: /opt/merlin/bin/lib/merlin-cli-3.2.4.jar
Merlin Arguments: target/classes -execute
---- exception report
----------------------------------------------------------
Exception: org.apache.avalon.merlin.KernelException
Message: Could not load the kernel directive:
file:/opt/merlin/config/kernel.xml
---- cause
---------------------------------------------------------------------
Exception: javax.xml.parsers.FactoryConfigurationError
Message: Provider org.apache.xerces.jaxp.SAXParserFactoryImpl not found
---- stack trace
---------------------------------------------------------------
javax.xml.parsers.FactoryConfigurationError: Provider
org.apache.xerces.jaxp.SAXParserFactoryImpl not found
javax.xml.parsers.SAXParserFactory.newInstance(SAXParserFactory.java:141
)
org.apache.avalon.framework.configuration.DefaultConfigurationBuilder.<i
nit>(DefaultConfigurationBuilder.java:135)
org.apache.avalon.framework.configuration.DefaultConfigurationBuilder.<i
nit>(DefaultConfigurationBuilder.java:118)
org.apache.avalon.merlin.impl.DefaultFactory.getKernelConfiguration(Defa
ultFactory.java:834)
org.apache.avalon.merlin.impl.DefaultFactory.create(DefaultFactory.java:
241)
org.apache.avalon.merlin.cli.Main.<init>(Main.java:329)
org.apache.avalon.merlin.cli.Main.main(Main.java:281)
------------------------------------------------------------------------
--------
</merlin_fails_to_find_jars>
<excerpt_from_INSTALL>
Special Note for JRE 1.3 and earlier.
-------------------------------------
Some applications assume that XML parsing classes are available withing
the JRE. This is not the case with JDK 1.3 and earlier. To resolve
this
you can copy the following files to the JAVAHOME/lib/ext directory or
declare an alternative directory as a JVM argument under the
MERLIN_JVM_OPTS environment variable, i.e. -Djava.ext.dir=someDirectory
system/xml-apis/jars/xml-apis-2.0.2.jar
system/xml-apis/jars/xmlParserAPIs-2.0.2.jar
system/xerces/jars/xerces-2.4.0.jar
</excerpt_from_INSTALL>
<test_code_to_prove_install_is_correct>
// Foo.java
// prove that this import statement does not fail
import org.apache.xerces.jaxp.SAXParserFactoryImpl;
class Foo {
public static void main(String[] args) {
// i just want to see what java thinks where its ext dir
is
String key = "java.ext.dirs";
String extDirs =
System.getProperties().getProperty(key);
System.out.println(key+"="+extDirs);
// see if we can actually use something from
SAXParserFactoryImpl
// to prove it can be loaded from the ext dir
SAXParserFactoryImpl testObj = new
SAXParserFactoryImpl();
System.out.println("success creating object="+testObj);
}
}
</test_code_to_prove_install_is_correct>
<running_the_test_code>
$ javac Foo.java
$ java Foo
java.ext.dirs=/usr/local/jdk1.3.1/jre/lib/ext
success creating
[EMAIL PROTECTED]
Then I moved the three jar files out of my /ext directory and reran and
got the errors I was expecting.
$ java Foo
java.ext.dirs=/usr/local/jdk1.3.1/jre/lib/ext
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/xerces/jaxp/SAXParserFactoryImpl
at Foo.main(Foo.java:11)
</running_the_test_code>
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