JNDI 查找失败 websphere JRE1.8

Question

I am migrating a legacy java/websphere application to JRE1.8

JNDI lookup code (below) works fine in websphere8.5.5(JRE1.7) but throws Exception in websphere8.5.5(JRE1.8)

[Root exception is com.ibm.websphere.naming.CannotInstantiateObjectException: Exception occurred while the JNDI NamingManager was processing a javax.naming.Reference object. [Root exception is javax.xml.parsers.FactoryConfigurationError: Provider javax.xml.parsers.DocumentBuilderFactory could not be instantiated: java.util.ServiceConfigurationError: javax.xml.parsers.DocumentBuilderFactory: Provider org.apache.xerces.jaxp.DocumentBuilderFactoryImpl not a subtype]]

        javax.naming.InitialContext ctx = new javax.naming.InitialContext();
        ds = (javax.sql.DataSource) ctx.lookup("java:comp/env/" + dsJNDIname);

I am sure, JNDI exists and valid. I tried looking up "java:comp/env/" with below code, still fails with Exception " Name not found in context "java:". "

        javax.naming.InitialContext ctx = new javax.naming.InitialContext();
        javax.naming.Context cxt = (javax.naming.Context) ctx.lookup("java:/comp/env/");

For the upgrade all I did was just rebuilding the source code in new workspace with JRE1.8. No code or config changes. Not sure, if I would require changes to web.xml or ejb-jar.xml etc

Any suggestions appreciated.

Answer 1

As suggested by F Rowe, the issue is because of some of the jars within source code which also came with websphere. I was able to overcome the issue by changing the application classpath.

Answer 2

See IBM support doc https://www.ibm.com/support/pages/apar/PI79037 . You've likely got one or more jar files on the classpath that have versions of xerces that are conflicting with the IBM xml parser.