NoClassDefFoundError... which .jar?

I see /usr/lib/jvm/java-1.5.0-sun-1.5.0.14/jre/lib/ext/sunjce_provider.jar

It is Sun 1.5

10:08:53,096 INFO  [ServerInfo] Java version: 1.5.0_10,Sun Microsystems Inc.
10:08:53,096 INFO  [ServerInfo] Java VM: Java HotSpot(TM) Server VM 1.5.0_10-b03,Sun Microsystems Inc.
10:08:53,096 INFO  [ServerInfo] OS-System: Linux 2.6.18-3-k7,i386
10:08:53,100 DEBUG [ServerInfo]     java.home:
/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre
10:08:53,100 DEBUG [ServerInfo]     java.specification.vendor: Sun
Microsystems Inc.
10:08:53,100 DEBUG [ServerInfo]     user.language: en
10:08:53,100 DEBUG [ServerInfo]     java.vm.info: mixed mode
10:08:53,100 DEBUG [ServerInfo]     java.version: 1.5.0_10
10:08:53,100 DEBUG [ServerInfo]     java.ext.dirs:
/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/lib/ext

10:08:53,100 DEBUG [ServerInfo]     sun.boot.class.path:
/usr/local/jboss/lib/endorsed/serializer.jar:/usr/local/jboss/lib/endorsed/xalan.jar:/usr/local/jboss/lib/endorsed/xercesImpl.jar:/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/lib/rt.jar:/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/lib/i18n.jar:/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/lib/sunrsasign.jar:/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/lib/jsse.jar:/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/lib/jce.jar:/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/lib/charsets.jar:/usr/lib/jvm/java-1.5.0-sun-1.5.0.10/jre/classes

The following beanshell script worked fine on the server, using the same JRE, proving that listAllBuckets works OK with the server's JRE, when not in JBoss. My guess is that JBoss loads something that puts the spanner in the works. I wonder how to work around this??

#!/usr/lib/jvm/java-1.5.0-sun/jre/bin/java bsh.Interpreter
 
/*
 
These are the .jars in the WEB-INF/lib directory:
 
bcprov-jdk15-136.jar        commons-logging-1.1.1.jar  junit-3.8.1.jar        
lucene-lucli-2.3.1.jar      tar-2.5.jar                commons-codec-1.3.jar       
jets3t-0.6.1.jar            log4j-1.2.14.jar           spring-2.0.5.jar        
typica-1.3.jar              commons-httpclient-3.1.jar jline-0.9.91.jar           
lucene-core-2.3.1.jar       tagsoup-1.1.3.jar
*/
 
// Add .jars from the deployed .war
String webLib = "/usr/share/java/jboss-4.2.2.GA/server/default/tmp/deploy/tmpxxxxxxx-exp.war/WEB-INF/lib/";
 
// Minimum set of .jars required for the jets3t test
addClassPath(webLib+"jets3t-0.6.1.jar");
addClassPath(webLib+"commons-logging-1.1.1.jar");
addClassPath(webLib+"commons-httpclient-3.1.jar");
addClassPath(webLib+"commons-codec-1.3.jar");
 
print("BeanShell test");
 
import org.jets3t.service.security.AWSCredentials;
import org.jets3t.service.S3Service;
import org.jets3t.service.impl.rest.httpclient.RestS3Service;
import org.jets3t.service.model.S3Bucket;
//import org.jets3t.service.model.S3Object;
import org.jets3t.service.S3ServiceException;
 
/* S3 service */
S3Service getS3Service() throws S3ServiceException {
        String awsAccessKey = "xxxxxxxxxxxx";
        String awsSecretKey = "xxxxxxxxxxxx";
        AWSCredentials awsCredentials = new AWSCredentials(awsAccessKey, awsSecretKey);
        return new RestS3Service(awsCredentials);
}
 
// Amazon S3 service
S3Service s3Service = getS3Service();
 
String bucketName = "lucy-services";
boolean gotBucket = false;
 
S3Bucket[] buckets = s3Service.listAllBuckets();
print("Found "+buckets.length+" buckets in S3");
S3Bucket lucyBucket = null;
for (S3Bucket bucket : buckets) {
        print("S3 bucket: "+bucket.getName());
        if (bucket.getName().equals(bucketName)) {
                gotBucket = true;
                lucyBucket = bucket;
        }
}
 
print(gotBucket?"Bucket located OK":"Bucket not found :-(");

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It looks like JBoss isn't loading javax.crypto.Mac, itself.

The test in the snippet gets...

Mac: javax.crypto.Mac
Provider: com.sun.crypto.provider.SunJCE - SunJCE Provider (implements RSA, DES, Triple DES, AES, Blowfish, ARCFOUR, RC2, PBE, Diffie-Hellman, HMAC)
Algorithm: HmacSHA1

...from the JRE, but putting the equivalent code into the web app gets:

2008-08-15 07:10:24,475 ERROR [STDERR] Exception in thread "Timer-13"
2008-08-15 07:10:24,475 ERROR [STDERR] java.lang.NoClassDefFoundError
2008-08-15 07:10:24,476 ERROR [STDERR]  at javax.crypto.Mac.getInstance(DashoA12275)

(in JBoss only - it is fine with Jetty).

I can confirm that jce.jar is in the JRE lib directory, but unless my understanding of the error message it wrong, the class is somehow not on the classpath??

#!/usr/lib/jvm/java-1.5.0-sun/jre/bin/java bsh.Interpreter
 
import javax.crypto.Mac;
import java.security.Provider;
 
try {
        Mac mac = Mac.getInstance("HmacSHA1");
        if (mac == null) {
                print("No Mac found");
                exit();
        }
        Provider provider = mac.getProvider();
        print("Mac: "+mac.getClass().getName());
        print("Provider: "+provider.getClass().getName()+" - "+provider.getInfo());
        print("Algorithm: "+mac.getAlgorithm());
        exit();
}
catch (Exception e) {
        e.printStackTrace();
}

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The problem appears to have been the JBoss class loader. I appear to have fixed it, by following the advice at http://jaitechwriteups.blogspot.com/, using an isolated class loader for the web application, by setting up jboss-web.xml as indicated in that blog.

Thanks!