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Francesco Chicchiriccò commented on OPENJPA-2791: ------------------------------------------------- {quote}It doesn't work here because the root of the problem is that the SAXParser cannot handle the HTTPS protocol (either directly or by redirection) {quote} The problem seems to be more following redirects rather than https; if you put [https://www.oracle.com/webfolder/technetwork/jsc/xml/ns/persistence/persistence_2_1.xsd] rather than [https://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd] it should work - at least, it works on some simple spike I've made locally: {code} SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI); Schema schema = schemaFactory.newSchema( new URL("https://www.oracle.com/webfolder/technetwork/jsc/xml/ns/persistence/persistence_2_1.xsd")); SAXSource source = new SAXSource(new InputSource(App.class.getResourceAsStream("/persistence.xml"))); Validator validator = schema.newValidator(); validator.validate(source); {code} works fine, while putting {code} https://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd {code} raises the "premature end of file" exception as reported above. > Parsing persistence.xml throws premature end of file error > ---------------------------------------------------------- > > Key: OPENJPA-2791 > URL: https://issues.apache.org/jira/browse/OPENJPA-2791 > Project: OpenJPA > Issue Type: Bug > Components: build / infrastructure, jpa > Affects Versions: 2.4.3 > Environment: Linux Ubuntu 18.04 > Reporter: Robert F. Peake > Priority: Major > Labels: build > > 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: > {quote}org.xml.sax.SAXException: > [file:/home/robert/git/sccdata/target/classes/META-INF/persistence.xml|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. > {quote} > 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: > {color:#000000}[article|[https://knowledgebase.progress.com/articles/Article/Unsupported-protocol-in-URL-reading-XML-from-a-URI].]{color} > {color:#000000} {color} > {color:#000000}The problem has been reported elsewhere [Stack > Overflow|https://stackoverflow.com/questions/56728487/org-xml-sax-saxparseexceptionpublicid-http-xmlns-jcp-org-xml-ns-persistence-p/56741356#56741356].{color} > -- This message was sent by Atlassian JIRA (v7.6.3#76005)