[OPENJPA-2791] Parsing persistence.xml throws premature end of file error

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.3
• Fix Version/s: 2.4.4, 3.1.0
• Component/s: build / infrastructure, jpa
• Labels: build
• Environment: Linux Ubuntu 18.04
• Flags: Important

Docs Text

Exception in thread "main" javax.persistence.PersistenceException: Explicit persistence provider error(s) occurred for "sccPU" after trying the following discovered implementations: org.apache.openjpa.persistence.PersistenceProviderImpl from provider: org.apache.openjpa.persistence.PersistenceProviderImpl
at javax.persistence.Persistence.createPersistenceException(Persistence.java:241)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:183)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:72)
at rfpeake.sccdata.app.Main.createEntityManagerFactory(Main.java:72)
at rfpeake.sccdata.app.Main.main(Main.java:46)
Caused by: <openjpa-2.4.3-r422266:1833086 nonfatal general error> org.apache.openjpa.util.GeneralException: org.xml.sax.SAXException: file:/home/robert/git/sccdata/target/classes/META-INF/persistence.xml [Location: Line: 5, C: 64]: org.xml.sax.SAXParseException; systemId: http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd; lineNumber: 1; columnNumber: 1; Premature end of file.
at org.apache.openjpa.lib.meta.XMLMetaDataParser.parseNewResource(XMLMetaDataParser.java:426)
at org.apache.openjpa.lib.meta.XMLMetaDataParser.parse(XMLMetaDataParser.java:346)
at org.apache.openjpa.lib.meta.XMLMetaDataParser.parse(XMLMetaDataParser.java:323)
at org.apache.openjpa.lib.meta.XMLMetaDataParser.parse(XMLMetaDataParser.java:296)
at org.apache.openjpa.persistence.PersistenceProductDerivation$ConfigurationParser.parse(PersistenceProductDerivation.java:811)
at org.apache.openjpa.persistence.PersistenceProductDerivation.parseResources(PersistenceProductDerivation.java:576)
at org.apache.openjpa.persistence.PersistenceProductDerivation.load(PersistenceProductDerivation.java:528)
at org.apache.openjpa.persistence.PersistenceProductDerivation.load(PersistenceProductDerivation.java:339)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:87)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:155)
at org.apache.openjpa.persistence.PersistenceProviderImpl.createEntityManagerFactory(PersistenceProviderImpl.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:149)
... 3 more

• Assignee: Unassigned
• Reporter: Robert F. Peake
• Created: 24/Jun/19 17:58
• Updated: 26/Jun/19 15:30
• Resolved: 26/Jun/19 08:11

Description

XMLMetaDataParser in org.apache.openjpa.lib.meta uses the SaxParser to read persistence.xml. Just within the last few days, it has begun to throw this error:

org.xml.sax.SAXException: file:/home/robert/git/sccdata/target/classes/META-INF/persistence.xml [Location: Line: 5, C: 64]: org.xml.sax.SAXParseException; systemId: http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd; lineNumber: 1; columnNumber: 1; Premature end of file.

Resorting to XML Copy Editor to validate the schema shows the error actually involved: Fatal Error at line 0, column 0: unsupported protocol in URL. It seems that Oracle's web site has switched from HTTP to HTTPS, which is a protocol that parser cannot handle, as explained in this post:

[article|https://knowledgebase.progress.com/articles/Article/Unsupported-protocol-in-URL-reading-XML-from-a-URI.]

 

The problem has been reported elsewhere Stack Overflow.

 

Issue Links

• is broken by: OPENJPA-2781 OpenJPA need internet connection to read the persistence.xml