Java. Lang. illegalargumentexception: unknown entity Solution

Environment

Myeclipse 8.6 + JBoss 6.0 + JDK 1.6.13 + EJB 3.0

 

Problem

The following exception occurs in the entitybean test:

Java. Lang. illegalargumentexception: unknownentity user.

 

Solution

Place persistence. xml under the SRC \ META-INF directory, if the src directory does not have a META-INF folder, you can create a new one.

Error: do not place persistence. xml under \ webroot \ META-INF.

 

References

Http://ningnian169.blog.51cto.com/2417825/450042

Http://stackoverflow.com/questions/7887481/how-to-get-rid-of-java-lang-illegalargumentexception-unknown-entity-while-run

Http://tieba.baidu.com/p/1076303186

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