[jboss-jira] [JBoss JIRA] Closed: (JBRULES-3102) InvalidClassException while deserialize knowledgeBase

[winton xu (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3102?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

winton xu closed JBRULES-3102.
------------------------------

    Resolution: Won't Fix


I have got a solution to resolve it.
if there is a InvalidClassException, we will create a empty knowledgeBase.
then we will re-build packages/process lazily.

> InvalidClassException while deserialize knowledgeBase
> -----------------------------------------------------
>
>                 Key: JBRULES-3102
>                 URL: https://issues.jboss.org/browse/JBRULES-3102
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-core
>            Reporter: winton xu
>            Assignee: Mark Proctor
>            Priority: Critical
>
> org.drools.rule.MVELDialectRuntimeData have not serialVersionUID defined
> Error:
> {noformat}
> java.io.InvalidClassException: org.drools.rule.MVELDialectRuntimeData; local class incompatible: stream classdesc serialVersionUID = 2609855281272796208, local class serialVersionUID = 5166066541265170937
> 	at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:562) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1583) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1496) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) ~[na:1.6.0_20]
> 	at java.util.HashMap.readObject(HashMap.java:1030) ~[na:1.6.0_20]
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_20]
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_20]
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_20]
> 	at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_20]
> 	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) ~[na:1.6.0_20]
> 	at org.drools.rule.DialectRuntimeRegistry.readExternal(DialectRuntimeRegistry.java:59) ~[org.drools.core_5.3.0.SNAPSHOT.jar:5.3.0-SNAPSHOT]
> 	at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) ~[na:1.6.0_20]
> 	at org.drools.rule.Package.readExternal(Package.java:191) ~[org.drools.core_5.3.0.SNAPSHOT.jar:5.3.0-SNAPSHOT]
> 	at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) ~[na:1.6.0_20]
> 	at java.util.HashMap.readObject(HashMap.java:1030) ~[na:1.6.0_20]
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_20]
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_20]
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_20]
> 	at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_20]
> 	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:974) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1849) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1753) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) ~[na:1.6.0_20]
> 	at org.drools.common.AbstractRuleBase.readExternal(AbstractRuleBase.java:270) ~[org.drools.core_5.3.0.SNAPSHOT.jar:5.3.0-SNAPSHOT]
> 	at org.drools.reteoo.ReteooRuleBase.readExternal(ReteooRuleBase.java:217) ~[org.drools.core_5.3.0.SNAPSHOT.jar:5.3.0-SNAPSHOT]
> 	at org.drools.impl.KnowledgeBaseImpl.readExternal(KnowledgeBaseImpl.java:115) ~[org.drools.core_5.3.0.SNAPSHOT.jar:5.3.0-SNAPSHOT]
> 	at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1792) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1751) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) ~[na:1.6.0_20]
> 	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) ~[na:1.6.0_20]
> {noformat}
> Detail: 
> we serialize the KnowledgeBase by the following code.
> {noformat}
>         ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
>         ObjectOutputStream out = new ObjectOutputStream(byteStream);
>         out.writeObject(_kbase);
>         out.close();
>         setKnowledgeBaseContents(byteStream.toByteArray());
> {noformat}
> we deserialize the knowledgebase by the following code.
> {noformat}
>           ByteArrayInputStream bi = new ByteArrayInputStream(info.getData());
>           ObjectInputStream oi = new ObjectInputStream(bi);
>           kbase = (KnowledgeBase) oi.readObject();
>           bi.close();
>           oi.close();
> {noformat}

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