jgit jar mystery NoClassDefFoundError

[maxandersen]

I can't explain this one so recording it for posperity:

this fails:
jbang org.eclipse.jgit:org.eclipse.jgit.pgm:5.9.0.202009080501-r

but doing this works:

///usr/bin/env jbang "$0" "$@" ; exit $?
//DEPS org.eclipse.jgit:org.eclipse.jgit.pgm:5.9.0.202009080501-r

import static java.lang.System.*;

public class jgit {

    public static void main(String... args) throws Exception {

        try {
            org.eclipse.jgit.pgm.Main.main(args);
        } catch(Exception e) {
            e.printStackTrace();
            throw e;
        }
    }
}
$ jbang jgit

that should technically work the exact same....

When run with verbose you see the only difference is that the first one launch via --jar where as second one is with main class specified.

but otherwise exact same classpath.

I tried removing the duplicate presence of pgm.jgit jar but gave same result.

[maxandersen]

The output from jbang incl. full command line:

 jbang --verbose org.eclipse.jgit:org.eclipse.jgit.pgm:5.9.0.202009080501-r
[jbang] Resolving dependencies...
[jbang]     Resolving org.eclipse.jgit:org.eclipse.jgit.pgm:5.9.0.202009080501-r...Done
[jbang] Dependencies resolved
[jbang] System Java version detected as 11
[jbang] System Java version matches requested version 11
[jbang] run: /Users/max/.sdkman/candidates/java/current/bin/java -classpath /Users/max/.m2/repository/args4j/args4j/2.33/args4j-2.33.jar:/Users/max/.m2/repository/org/apache/commons/commons-compress/1.19/commons-compress-1.19.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.archive/5.9.0.202009080501-r/org.eclipse.jgit.archive-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/osgi/org.osgi.core/4.3.1/org.osgi.core-4.3.1.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit/5.9.0.202009080501-r/org.eclipse.jgit-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/com/googlecode/javaewah/JavaEWAH/1.1.7/JavaEWAH-1.1.7.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.ui/5.9.0.202009080501-r/org.eclipse.jgit.ui-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.gpg.bc/5.9.0.202009080501-r/org.eclipse.jgit.gpg.bc-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/bouncycastle/bcpg-jdk15on/1.65/bcpg-jdk15on-1.65.jar:/Users/max/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.65.01/bcprov-jdk15on-1.65.01.jar:/Users/max/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.65/bcpkix-jdk15on-1.65.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.http.apache/5.9.0.202009080501-r/org.eclipse.jgit.http.apache-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/apache/httpcomponents/httpcore/4.4.12/httpcore-4.4.12.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.ssh.apache/5.9.0.202009080501-r/org.eclipse.jgit.ssh.apache-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-osgi/2.4.0/sshd-osgi-2.4.0.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-sftp/2.4.0/sshd-sftp-2.4.0.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-core/2.4.0/sshd-core-2.4.0.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-common/2.4.0/sshd-common-2.4.0.jar:/Users/max/.m2/repository/net/i2p/crypto/eddsa/0.3.0/eddsa-0.3.0.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.ssh.jsch/5.9.0.202009080501-r/org.eclipse.jgit.ssh.jsch-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/com/jcraft/jsch/0.1.55/jsch-0.1.55.jar:/Users/max/.m2/repository/com/jcraft/jzlib/1.1.1/jzlib-1.1.1.jar:/Users/max/.m2/repository/org/apache/httpcomponents/httpclient/4.5.10/httpclient-4.5.10.jar:/Users/max/.m2/repository/commons-logging/commons-logging/1.2/commons-logging-1.2.jar:/Users/max/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/max/.m2/repository/org/slf4j/slf4j-api/1.7.2/slf4j-api-1.7.2.jar:/Users/max/.m2/repository/org/slf4j/slf4j-log4j12/1.7.2/slf4j-log4j12-1.7.2.jar:/Users/max/.m2/repository/log4j/log4j/1.2.15/log4j-1.2.15.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-servlet/9.4.30.v20200611/jetty-servlet-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-security/9.4.30.v20200611/jetty-security-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-server/9.4.30.v20200611/jetty-server-9.4.30.v20200611.jar:/Users/max/.m2/repository/javax/servlet/javax.servlet-api/3.1.0/javax.servlet-api-3.1.0.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-http/9.4.30.v20200611/jetty-http-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-util/9.4.30.v20200611/jetty-util-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-io/9.4.30.v20200611/jetty-io-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.lfs/5.9.0.202009080501-r/org.eclipse.jgit.lfs-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.lfs.server/5.9.0.202009080501-r/org.eclipse.jgit.lfs.server-5.9.0.202009080501-r.jar -jar /Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.pgm/5.9.0.202009080501-r/org.eclipse.jgit.pgm-5.9.0.202009080501-r.jar
Error: Unable to initialize main class org.eclipse.jgit.pgm.Main
Caused by: java.lang.NoClassDefFoundError: org/eclipse/jgit/transport/http/HttpConnectionFactory

jbang --verbose jgit.java
[jbang] System Java version detected as 11
[jbang] System Java version matches requested version 11
[jbang] run: /Users/max/.sdkman/candidates/java/current/bin/java -classpath /Users/max/.jbang/cache/jars/jgit.java.061d3c9c950bc38a317143e90b806c87ac95de7e7c01fd0ff16633385698cd32.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.pgm/5.9.0.202009080501-r/org.eclipse.jgit.pgm-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/args4j/args4j/2.33/args4j-2.33.jar:/Users/max/.m2/repository/org/apache/commons/commons-compress/1.19/commons-compress-1.19.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.archive/5.9.0.202009080501-r/org.eclipse.jgit.archive-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/osgi/org.osgi.core/4.3.1/org.osgi.core-4.3.1.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit/5.9.0.202009080501-r/org.eclipse.jgit-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/com/googlecode/javaewah/JavaEWAH/1.1.7/JavaEWAH-1.1.7.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.ui/5.9.0.202009080501-r/org.eclipse.jgit.ui-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.gpg.bc/5.9.0.202009080501-r/org.eclipse.jgit.gpg.bc-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/bouncycastle/bcpg-jdk15on/1.65/bcpg-jdk15on-1.65.jar:/Users/max/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.65.01/bcprov-jdk15on-1.65.01.jar:/Users/max/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.65/bcpkix-jdk15on-1.65.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.http.apache/5.9.0.202009080501-r/org.eclipse.jgit.http.apache-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/apache/httpcomponents/httpcore/4.4.12/httpcore-4.4.12.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.ssh.apache/5.9.0.202009080501-r/org.eclipse.jgit.ssh.apache-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-osgi/2.4.0/sshd-osgi-2.4.0.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-sftp/2.4.0/sshd-sftp-2.4.0.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-core/2.4.0/sshd-core-2.4.0.jar:/Users/max/.m2/repository/org/apache/sshd/sshd-common/2.4.0/sshd-common-2.4.0.jar:/Users/max/.m2/repository/net/i2p/crypto/eddsa/0.3.0/eddsa-0.3.0.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.ssh.jsch/5.9.0.202009080501-r/org.eclipse.jgit.ssh.jsch-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/com/jcraft/jsch/0.1.55/jsch-0.1.55.jar:/Users/max/.m2/repository/com/jcraft/jzlib/1.1.1/jzlib-1.1.1.jar:/Users/max/.m2/repository/org/apache/httpcomponents/httpclient/4.5.10/httpclient-4.5.10.jar:/Users/max/.m2/repository/commons-logging/commons-logging/1.2/commons-logging-1.2.jar:/Users/max/.m2/repository/commons-codec/commons-codec/1.11/commons-codec-1.11.jar:/Users/max/.m2/repository/org/slf4j/slf4j-api/1.7.2/slf4j-api-1.7.2.jar:/Users/max/.m2/repository/org/slf4j/slf4j-log4j12/1.7.2/slf4j-log4j12-1.7.2.jar:/Users/max/.m2/repository/log4j/log4j/1.2.15/log4j-1.2.15.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-servlet/9.4.30.v20200611/jetty-servlet-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-security/9.4.30.v20200611/jetty-security-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-server/9.4.30.v20200611/jetty-server-9.4.30.v20200611.jar:/Users/max/.m2/repository/javax/servlet/javax.servlet-api/3.1.0/javax.servlet-api-3.1.0.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-http/9.4.30.v20200611/jetty-http-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-util/9.4.30.v20200611/jetty-util-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jetty/jetty-io/9.4.30.v20200611/jetty-io-9.4.30.v20200611.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.lfs/5.9.0.202009080501-r/org.eclipse.jgit.lfs-5.9.0.202009080501-r.jar:/Users/max/.m2/repository/com/google/code/gson/gson/2.8.2/gson-2.8.2.jar:/Users/max/.m2/repository/org/eclipse/jgit/org.eclipse.jgit.lfs.server/5.9.0.202009080501-r/org.eclipse.jgit.lfs.server-5.9.0.202009080501-r.jar jgit
jgit --git-dir GIT_DIR --help (-h) --show-stack-trace --version command [ARG ...]

The most commonly used commands are:
 add                  Add file contents to the index
 archive              Zip up files from the named tree
...
...

[maxandersen]

https://twitter.com/alblue/status/1314350114736148480 reminded me of why this fails -jar and -cp are mutual exclusive. java prints no warning or error but when using -jar then -cp are ignored - no matter what.

[maxandersen]

this was fixed in recent releases. no longer uses -jar as it behaves as an island not extendable.