Final answer:
The groovy.lang.MissingMethodException is fixed by ensuring that the invoked method exists, is correctly spelled, has the right parameters, and the class is properly imported and instantiated. It's also important to check the stack trace for debugging.
Step-by-step explanation:
The groovy.lang.MissingMethodException occurs in the Groovy programming language when the code attempts to invoke a method that does not exist. To fix this error, first, ensure that the method name and signature (the method's parameters) exactly match what is declared or that the method is defined. If you are working with Groovy within the context of another platform, such as a Jenkins pipeline, it could also be caused by required plugins not being installed or a script security exception. Additionally, if the method belongs to a class instance, confirm that the object is properly instantiated before calling its methods.
Some common reasons for this error include typos in the method name, incorrect or missing import statements for the class defining the method, or attempting to call a method with the wrong number or type of parameters. It could also be a scope issue where the method is not accessible from the context in which it's being called.
To identify and fix the issue, check the stack trace for hints on where the error occurred and verify each of the possible causes listed above.