How to Resolve \'CreateProcess Error 206\' in Eclipse When Executing Java Main Method?

Resolving "CreateProcess Error 206" When Executing Java Main Method in Eclipse

When encountering the error "CreateProcess error=206, The filename or extension is too long when running main() method" in Eclipse Helios, it often stems from an overly long file path.

Problem:

The original poster experienced this error when running a main() method in their Servlet 3.0 project. The error occurred when Hibernate and RESTEasy were used in conjunction with JBOSS 6.

Solution:

As there is no straightforward solution, consider the following workarounds:

• Reduce the Classpath: Inspect the project's classpath and remove unnecessary entries.
• Use Directories Instead of JAR Files: Store class files in directories rather than JAR files to shorten the file path.
• Create a Packed JAR File with Classpath: Build a single JAR file containing all other JAR files and use the manifest file's classpath variable to reference them.
• Utilize a Custom Class Loader: Implement a custom class loader that can load classes from a specified configuration file.
• Apply Eclipse Patches: Investigate the patches available in the Eclipse.org bug report (linked in the provided answer).
• Use a Wrapper (e.g., Ant): Create a wrapper script, such as an Ant build file, to execute the main() method.

Updated Solution (Post-July 2014):

• Specify "useexternalfile=yes" in Javadoc Task: If using a custom build file for Javadoc generation, add "useexternalfile=yes" to the Javadoc task. This explicitly specifies the use of an external file for the classpath.

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