Re: [rules-users] java.lang.LinkageError, but only sometimes
Hi,
Thank you for your reply. My original post was wrongly obfuscated. This is the correct
stacktrace:
java.lang.LinkageError: loader (instance of
org/drools/rule/JavaDialectRuntimeData$PackageClassLoader): attempted
duplicate class definition for name:
"a/b/c/Rule_person_unique___name_656ee3db19d34e689d95e2d6b2be67b6"
at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.6.0_30]
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) [rt.jar:1.6.0_30]
at java.lang.ClassLoader.defineClass(ClassLoader.java:615) [rt.jar:1.6.0_30]
at
org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615)
[drools-core-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at
org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88)
[knowledge-api-5.4.0.Final.jar:5.4.0.Final]
at java.lang.ClassLoader.loadClass(ClassLoader.java:295) [rt.jar:1.6.0_30]
at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [rt.jar:1.6.0_30]
at
a.b.c.Rule_person___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0InvokerGenerated.evaluate(Unknown
Source)
at
a.b.c.Rule_person___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0Invoker.evaluate(Unknown
Source)
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:114)
[drools-core-5.4.0.Final.jar:5.4.0.Final]
Has there been some mixture of compiled packages in a way as it
should not be done?
Hmmm, I don't understand very well, can you please
elaborate?
Is the procedure for generating these artificial names watertight?
I don't think I understand this either. The rules all have unique names. The
name: "Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6" is generated by
drools itself.
----- Original Message -----
From: "Wolfgang Laun" <wolfgang.laun(a)gmail.com>
To: "Rules Users List" <rules-users(a)lists.jboss.org>
Sent: Thursday, November 22, 2012 10:51:57 AM
Subject: Re: [rules-users] java.lang.LinkageError, but only sometimes
Just in case this has been missed (and using some guesswork) I should
point out that the generated name extensions for the classes
containing the right hand side code in a method are identical for two
different rules clashing in the load of the serialized knowledge base.
a/b/c/Rule_person_unique___name_656ee3db19d34e689d95e2d6b2be67b6
a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6
Has there been some mixture of compiled packages in a way as it should
not be done? Is the procedure for generating these artificial names
watertight?
-W
On 22/11/2012, kennywest <kenneth.westelinck(a)telenet.be> wrote:
I tried the suggestion from:
https://issues.jboss.org/browse/JBRULES-3675
by
adding a synchronized to the loadClass method. After further testing the
problem remains :( So adding synchronized does not solve the problem. Any
bright ideas? I am willing to try everything :)
--
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