How to handle a Findbugs “Non-transient non-serializable instance field in serializable class”?

Question

Consider the class below. If I run Findbugs against it it will give me an error (\"Non-transient non-serializable instance field in serializable class\") on line 5 but not o

Answer 1

In case you are using findbugs-maven-plugin and have to persist a field, and that field is a class not implementing Serializable interface, for example, a field that has a class defined in a 3rd party. You can manually configure exclude file for findbugs,

If this is the only case, add it in an exclude file: pom:

    org.codehaus.mojo
    findbugs-maven-plugin
    3.0.3
    
          true
          target/findbugs/
          findbugs-exclude.xml
          findbugs-include.xml
          true
    
...

exclude.xml:

Entity:

@Entity
public class Foo extends Boo {
    StateMachineContext stateMachineContext;

Although I don't understand why adding would not work. Besides, I don't agree with the solution of adding annotation on the field like @edu.umd.cs.findbugs.annotations.SuppressWarnings(justification="No bug", values="SE_BAD_FIELD"), because building tools better not penetrate business code.maven plugin usage & findbugs filters both include and exclude

About SE_BAD_FIELD: Non-transient non-serializable instance field in serializable class, I think it should not check on entities. Because, javax.persistence.AttributeConverter offers methods to serialize a field out side (implements Serializable is an inside method to serialize).