JPA Error Provider

 JPA Error Provider

java.io.IOException: org.xml.sax.SAXParseException; lineNumber: 6; columnNumber: 15; Deployment descriptor file META-INF/persistence.xml in archive [classes].  cvc-complex-type.2.4.a: Invalid content was found starting with element 'provider'. One of '{"http://xmlns.jcp.org/xml/ns/persistence":non-jta-data-

source, "http://xmlns.jcp.org/xml/ns/persistence":mapping-file, "http://xmlns.jcp.org/xml/ns/persistence":jar-file, "http://xmlns.jcp.org/xml/ns/persistence":class, "http://xmlns.jcp.org/xml/ns/persistence":exclude-unlisted-classes, "http://xmlns.jcp.org/xml/ns/persistence":shared-cache-mode, "http://xmlns.jcp.org/xml/ns/persistence":validation-mode, "http://xmlns.jcp.org/xml/ns/persistence":properties}' is expected.

Order of elements inside <persistence-unit> is important, <jta-data-source> should go after <provider>:

Example:

 

<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>

<jta-data-source>JNDI_data_mysql</jta-data-source>