Failed to run a Java app with Git Bash

Question

I downloaded SymmetricDS, a tool for Database replication and tried to run it on my Windows7 machine. The program can be launched from command line and it works with Windows Terminal. However I always prefer Git Bash for command line stuff. When I run command sym though, I got error:

Error: Could not find or load main class org.jumpmind.symmetric.SymmetricLauncher

This tool is written in Java. I have JDK 1.8 installed. Git Bash inherits all environmental variables including $PATH and $JAVA_HOME from Windows. But why is it complaining about not finding the class?

The sym command is really running the following command:

exec "$SYM_JAVA" $SYM_OPTIONS -cp "$CLASSPATH" org.jumpmind.symmetric.SymmetricLauncher "$@"

All the jars are located in lib under the root directory of the application. The classpath is defined in a sym.service.conf inside conf directory:

# Java Classpath
wrapper.java.classpath.1=patches
wrapper.java.classpath.2=patches/*
wrapper.java.classpath.3=lib/*.jar
wrapper.java.classpath.4=web/WEB-INF/lib/*.jar

# Application main class and arguments
wrapper.app.parameter.1=org.jumpmind.symmetric.SymmetricLauncher

I added echo $CLASSPATH right before the exec to print out the class path and it did seem to get all of them right:

/c/Users/dnj0109/Apps/symmetric-server-3.8.29/patches:
/c/Users/dnj0109/Apps/symmetric-server-3.8.29/patches/*:
/c/Users/dnj0109/Apps/symmetric-server-3.8.29/lib/*:
/c/Users/dnj0109/Apps/symmetric-server-3.8.29/web/WEB-INF/lib/*

VonC · Accepted Answer · 2017-09-06 05:28:51Z

16

That could be related to this thread:

On Windows, the path separator is a semicolon (';' instead of ':').
Don't ask why. Traditionally, the semicolon is interpreted by the Bash as the command separator, so you'll have to escape it:

$ java -cp lib/clojure-1.1.0.jar\;lib/clojure-contrib-1.1.0.jar

If you wonder why it works with PATH: MSys has special handling routines for that.

answered Sep 6, 2017 at 5:28

VonC

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Comments

Joman68 · Accepted Answer · 2022-12-31 20:18:36Z

2

Another reason that a java app may run in a Windows CMD shell but not in a Windows git bash shell is that the classpath used to run the app contains one of the following:

relative paths (e.g. ../foo)
network drives (e.g. //servername/bah

See: https://github.com/git-for-windows/git/issues/1028

edited Dec 31, 2022 at 20:18

answered Aug 17, 2018 at 5:01

Joman68

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