The following steps will help to pinpoint the problem: Step 1: Find Out Where the Class Comes Fromįirst, we need to find out where the class containing the method in question comes from. The compile time classpath differs from the runtime classpath. There are a lot of different flavors of NoSuchMethodErrors, but they all boil down to the fact that This indicates an error in our build pipeline since module B obviously has not been compiled against the new version In one module (A) and during runtime the code of another module (B) fails with a NoSuchMethodError. We have removed a certain method from the code The same can happen in multi-module builds, though this is less common. Resolve a version conflict like this by simply choosing one of the versions, opening the door for a NoSuchMethodError. Which also has a dependency on B, but on a different version.īuild systems like Gradle and Maven usually In this case, which is the most common cause for NoSuchMethodErrors in my experience, we probably have a version conflict in our build system. A is a transitive dependency to our project). Rather, it’s aĭependency of another 3rd party library (B) that we use (i.e. Imagine we’re using a 3rd party library (A) as described above, but we’re not calling it directly. This indicates a problem in our build process. That does not provide the method in question. The classpath must be different during compile time and runtime.Īt compile time we use the correct version of the library while at runtime we somehow included a different version However, since our own code calling the method in question has been successfully compiled, This breaking change removed a method from the Had a breaking change from one version to the next. The potential root cause for a NoSuchMethodError is that one of the libraries we use in our project Let’s discuss some common situations that cause a NoSuchMethodError. To compile the class calling that method with an error: cannot find symbol. The method must have existed at compile time, since otherwise the compiler would have refused When we’re calling a method that does not exist at runtime.
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