OK, I wasn't including jboss' jax-rpc implementation as a jdk-endorsed jar (I thought Jboss' implementation should be compatible with Sun's included one). But unfortunately when I include jboss-jaxrpc.jar in the endorsed lib claims that org.jboss.logging.Logger is not found and when that class is included in classpath to fullfill the requirement a long list of messages are thrown (this only means that I'm loosing log, not funtionality), but the problem (the exception at webservice invocation) remains unsolved: Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1f934ad, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1d05c81, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@26d4f1, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@82701e, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@8fce95, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@143c8b3, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@6e70c7, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@a6aeed, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@126804e, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@64f6cd, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@47393f, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1ff7a1e, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@763f5d, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@186768e, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@d19bc8, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1e8a1f6, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1e152c5, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1319c, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@6025e7, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@15b0afd, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@2e7820, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@14c1103, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@f11404, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1592174, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@a352a5, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@704baa, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@77a7f9, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@c7b00c, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@5329c5, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1db699b, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@10f11b8, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@18f6235, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1c282a1, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@10e3293, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@11a64ed, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1c9a690, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@13ad085, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@4fce71, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@698403, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@15a0305, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@7c4c51, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@765a16, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@148bd3, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@12bb7e0, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@12d15a9, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@1238bd2, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@a761fe, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@4f80d6, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@193722c, cause: org/apache/log4j/LogManager Failed to initalize plugin: org.jboss.logging.Log4jLoggerPlugin@12cc95d, cause: org/apache/log4j/LogManager Seems that JBoss is having serious issues with JDK 1.6, so going back to JDK 1.5 where all runs OK. I would offer my assistance to debug this issues if asked. I can provide several use cases that reproduce this kind of problems (all related to jbossws). Greets, Pedro View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4002150#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...