Same jar in a different ear's APP-INF/lib affects web app in another ear
I have 2 web apps deployed in separate ear files running on jboss 4.2.3.GA. Ear1 has a jar file in its app-inf/lib folder. Ear2 has the same jar file in one of it's web app's(WAR) web-inf/lib folder. Ear2's web app throws the below error during normal operation but doesn't throw the error when I remove the jar file from ear1 and restart jboss. During jboss startup, ear1 deploys before ear2 deploys. The jar file in question is the exact same one in both ears. Why does my jms consumer think the object is not what was expected? The source snippet(line 91) is below also.
09:23:08,124 WARN [SpyMessageConsumer] Message listener mil.jpmis.cbrnis.client.service.modeling.TaskStatusJMSConsumer@
77ff61 threw a throwable.
java.lang.ArrayStoreException: mil.jpmis.jem.mn.task.cbws.AgentData
at java.io.ObjectInputStream.readArray(ObjectInputStream.java:1667)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1323)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1947)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1871)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
at org.jboss.mq.SpyObjectMessage.getObject(SpyObjectMessage.java:147)
at mil.jpmis.cbrnis.client.service.modeling.TaskStatusJMSConsumer.onMessage(TaskStatusJMSConsumer.java:91)
at org.jboss.mq.SpyMessageConsumer.run(SpyMessageConsumer.java:697)
at java.lang.Thread.run(Thread.java:619)
public void onMessage(Message message) {
if(message instanceof ObjectMessage ) { ObjectMessage objMsg = (ObjectMessage )message;
try {
if(objMsg.getObject() instanceof IRunRequestStatus) { <-------- line 91 of TaskStatusJMSConsumer