ClassNotFound Exception with classes of my own project 5.5.1

I am developing a project using playframework and when I try to use dozer for some mappings, I get a ClassNotFoundException with classes that are part of my own project. I suspect it has something to do with the class loader (as explained here) of play, which might not be compatible with this version (even though when using dozer 5.4.0 I have no problem at all)

[info] play.api.Play$ - Application started (Dev)
[info] o.d.DozerBeanMapper - Initializing a new instance of dozer bean mapper.
[info] o.d.DozerBeanMapper - Using the following xml files to load custom mappings for the bean mapper instance: [dozerMapping.xml]
[info] o.d.DozerBeanMapper - Trying to find xml mapping file: dozerMapping.xml
[info] o.d.DozerBeanMapper - Using URL [file:/Users/cdparra/Projects/appcivist/appcivist-platform/target/scala-2.11/classes/dozerMapping.xml] to load custom xml mappings
[error] o.d.l.x.MappingStreamReader - Error while loading dozer mapping InputStream: [java.io.BufferedInputStream@1fd14bad]
org.dozer.MappingException: java.lang.ClassNotFoundException: models.location.Location
    at org.dozer.util.MappingUtils.throwMappingException(MappingUtils.java:82) ~[dozer-5.5.1.jar:na]
    at org.dozer.util.DefaultClassLoader.loadClass(DefaultClassLoader.java:43) ~[dozer-5.5.1.jar:na]
    at org.dozer.util.MappingUtils.loadClass(MappingUtils.java:224) ~[dozer-5.5.1.jar:na]
    at org.dozer.loader.DozerBuilder$MappingBuilder.classA(DozerBuilder.java:129) ~[dozer-5.5.1.jar:na]
    at org.dozer.loader.xml.XMLParser.parseMapping(XMLParser.java:190) ~[dozer-5.5.1.jar:na]
    at org.dozer.loader.xml.XMLParser.read(XMLParser.java:137) ~[dozer-5.5.1.jar:na]
    at org.dozer.loader.xml.XMLParser.read(XMLParser.java:43) ~[dozer-5.5.1.jar:na]
    at org.dozer.loader.xml.MappingStreamReader.read(MappingStreamReader.java:51) ~[dozer-5.5.1.jar:na]
    at org.dozer.loader.xml.MappingFileReader.read(MappingFileReader.java:58) [dozer-5.5.1.jar:na]
    at org.dozer.DozerBeanMapper.loadFromFiles(DozerBeanMapper.java:227) [dozer-5.5.1.jar:na]
Caused by: java.lang.ClassNotFoundException: models.location.Location
    at java.net.URLClassLoader$1.run(URLClassLoader.java:372) ~[na:1.8.0_25]
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[na:1.8.0_25]
    at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_25]
    at java.net.URLClassLoader.findClass(URLClassLoader.java:360) ~[na:1.8.0_25]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_25]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_25]
    at java.lang.Class.forName0(Native Method) ~[na:1.8.0_25]
    at java.lang.Class.forName(Class.java:344) ~[na:1.8.0_25]
    at org.apache.commons.lang3.ClassUtils.getClass(ClassUtils.java:909) ~[commons-lang3-3.4.jar:3.4]
    at org.apache.commons.lang3.ClassUtils.getClass(ClassUtils.java:943) ~[commons-lang3-3.4.jar:3.4]

[christianmenz]

Took me quite a while to figure out what the problem was for me. I can’t tell for sure as I don’t know your exact setup, but maybe this helps other people searching for a solution. I’m using dozer in an enterprise application and dozer jar is loaded by the EARLibClassLoader (the app by the EARAppClassLoader).

Dozer does this:

DozerClassLoader classLoader = new DefaultClassLoader(getClass().getClassLoader());

Which imho is the wrong classloader for loading the classes in my dozer mapping file. I fixed this by adding this line of code before creating the mapper:

BeanContainer.getInstance().setClassLoader(new DefaultClassLoader(Thread.currentThread().getContextClassLoader()));

[garethahealy]

Duplicate of https://github.com/DozerMapper/dozer/issues/248