I have configured a connection pool in JBoss to talk to MySQL DB (using a *-ds.xml in deploy directory) The datasource is bound to JNDI and is used by applications running in a different VM Basic query/update has always been fine :) Recently I had to store a java object in MySQL DB I used preparedstatement.readobject and writeobject(). This seems to be throwing JbossLazyUnmarshallingException I used the same code in a normal Java program (using DriverManager rather than the JNDI to get the SQL connection) This ran fine (both for reading and writing objects) How to avoid the Unmarshallingexception? Do I need to use Streams to write and read data? Or is there is a config to disable Lazy Unmarshalling?: Configuration: ---------------- Jboss 4.2.3 GA Mysql 5.0.46 enterprise Mysql connector : 5.1.7 thanks in advance :) Venu View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4205989#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...