[rules-users] java.io.InvalidClassException: org.drools.rule.Package; local class incompatible: stream classdesc serialVersionUID = 400,local class serialVersionUID = 320

[Anstis, Michael (M.)]

Was the package serialised using a different version of Drools to which you
are trying to deserialise it?


  _____  

From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of vamshidhar reddy
chitti
Sent: 17 October 2007 11:18
To: rules-users at lists.jboss.org
Subject: [rules-users] java.io.InvalidClassException:
org.drools.rule.Package;local class incompatible: stream classdesc
serialVersionUID = 400,local class serialVersionUID = 320


hello
am using the binary package from drools brms and tying to execute

         BinaryRuleBaseLoader loader = new BinaryRuleBaseLoader();

         loader.addPackage( DroolsTest.class.getResourceAsStream(
"com.valuemomentum.ipru.camscontract.model.pkg" ) );
         RuleBase rb = loader.getRuleBase();

but i get the following errors,
org.drools.RuntimeDroolsException: java.io.InvalidClassException:
org.drools.rule.Package; local class incompatible: stream classdesc
serialVersionUID = 400, local class serialVersionUID = 320
    at
org.drools.util.BinaryRuleBaseLoader.addPackage(BinaryRuleBaseLoader.java:10
0)
    at
org.drools.util.BinaryRuleBaseLoader.addPackage(BinaryRuleBaseLoader.java:67
)
    at com.sample.DroolsTest.readRule(DroolsTest.java:59)
    at com.sample.DroolsTest.main(DroolsTest.java:28)
Caused by: java.io.InvalidClassException: org.drools.rule.Package; local
class incompatible: stream classdesc serialVersionUID = 400, local class
serialVersionUID = 320
    at java.io.ObjectStreamClass.initNonProxy(Unknown Source)
    at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
    at java.io.ObjectInputStream.readClassDesc(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at
org.drools.util.BinaryRuleBaseLoader.addPackage(BinaryRuleBaseLoader.java:82
)
    ... 3 more


i tried replacing mvel jar file with mvel-snapshot jar file...but same
error...

anyone has idea.

how to use absolute path in my application instead downloading binary
package and using.

thanx in advance.
vamshi




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