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I have a hibernate and JSF2 application going to the deployment server and suddenly throwing an org.hibernate.AssertionFailure: null id in exception. I will provide the stack trace and code immediately but here are four important issues first: This happens only on the deployment server (Jboss & MySql running on Windows Sever 2008.) It does not happen on my development machine (Tomcat and MySql running on Windoes 7 Pro) and also not on the staging environment (Jboss and MySql running on Linux.) Researching this, it seems that people get this error when trying to insert an object. But I get the error when I'm doing a simple query. (various different queries, actually, as the error pops up on several pages randomly.) The error hits only every now and then. If I do a Jboss restart it goes away, but a time later returns. Also, it's not consistent, on some clicks it's there, on others it's not. Even when it hits, when I do a simple refresh of the page it returns fine. I'm using c3p0 (config below) Any idea what's going on? The code details: This happens on an address object. Here's the full hbm: <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="com.idex.auctions.model"> <class name="Address" table="address" lazy="true"> <id name="addressID" column="AddressID"> <generator class="native"/> </id> <property name="street" column="street"/> <property name="city" column="city"/> <property name="zip" column="zip"/> <property name="state" column="state"/> <property name="region" column="region"/> <property name="country" column="country"/> <many-to-one name="user" class="com.idex.a

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