[JBoss JIRA] Created: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
4:52 a.m.
Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible
classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Rules
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
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4:56 a.m.
New subject: [JBoss JIRA] Updated: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=all ]
Alexander Gavrilov updated JBRULES-1212:
----------------------------------------
Attachment: ReteShadowProxyTest.java
Test case simulated the inaccessible ClassLoader issue
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
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11:33 a.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=comments#action_12378212 ]
Mark Proctor commented on JBRULES-1212:
---------------------------------------
private Class loadOrGenerateProxy(Class clazz,
Rete rete) {
Class shadowClass = null;
final String shadowProxyName = ShadowProxyFactory.getProxyClassNameForClass(
clazz );
try {
// if already loaded
shadowClass = rete.getRuleBase().getMapBackedClassLoader().loadClass(
shadowProxyName );
} catch ( final Throwable e ) {
// swallow this as we want to catch a number of exceptions and then
attempt
// again in the following line, if shadowClass still isn't assigned.
}
if ( shadowClass == null ) {
// otherwise, create and load
final byte[] proxyBytes = ShadowProxyFactory.getProxyBytes( clazz );
if ( proxyBytes != null ) {
rete.getRuleBase().getMapBackedClassLoader().addClass(
shadowProxyName,
proxyBytes );
try {
shadowClass =
rete.getRuleBase().getMapBackedClassLoader().loadClass( shadowProxyName );
} catch ( Throwable e ) {
throw new RuntimeException( "Unable to find or generate the
ShadowProxy implementation for '" + clazz + "'", e);
}
}
}
return shadowClass;
}
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
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7:12 a.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=comments#action_12378521 ]
Mark Proctor commented on JBRULES-1212:
---------------------------------------
When you apply the fix I did above, is it now solving your problem? If not have you
managed to find a solution?
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Fix For: 4.0.2
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
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7:12 a.m.
New subject: [JBoss JIRA] Updated: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=all ]
Mark Proctor updated JBRULES-1212:
----------------------------------
Fix Version/s: 4.0.2
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Fix For: 4.0.2
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
--
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3:31 a.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=comments#action_12379249 ]
Mark Proctor commented on JBRULES-1212:
---------------------------------------
If you want this fix in 4.0.2, you'll have to hurry with your feedback.
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Fix For: 4.0.2
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
--
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5:46 a.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=comments#action_12379260 ]
Alexander Gavrilov commented on JBRULES-1212:
---------------------------------------------
I'm sorry. The propsed fix does not solve the problem, because of NoClassDefFoundError
catching in the secont catch block and rethrowing as RuntimeException. I believe we need
just skip this error and let code callig loadOrGenerateProxy to try superclass.
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Rules
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Fix For: 4.0.2
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
--
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5:31 p.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=comments#action_12379736 ]
Edson Tirelli commented on JBRULES-1212:
----------------------------------------
Alexander,
I just fixed http://jira.jboss.com/jira/browse/JBRULES-1239 and I think your use case is
covered now. I developed 2 tests, as you can see bellow: one using thread context API and
the other using drools configuration classes:
public void testClassLoaderSwitchsUsingConf() throws Exception {
try {
// Creates first class loader and use it to load fact classes
ClassLoader loader1 = new SubvertedClassLoader( new
URL[]{getClass().getResource( "/" ).toURI().toURL()},
this.getClass().getClassLoader() );
Class cheeseClass = loader1.loadClass( "org.drools.Cheese" );
PackageBuilderConfiguration conf = new PackageBuilderConfiguration( loader1
);
PackageBuilder builder = new PackageBuilder( conf );
builder.addPackageFromDrl( new InputStreamReader(
getClass().getResourceAsStream( "test_Dynamic1.drl" ) ) );
// must set the classloader for rulebase conf too
RuleBaseConfiguration rbconf = new RuleBaseConfiguration( loader1 );
RuleBase ruleBase = RuleBaseFactory.newRuleBase( rbconf );
Package pkg = builder.getPackage();
ruleBase.addPackage( pkg );
StatefulSession wm = ruleBase.newStatefulSession();
wm.insert( cheeseClass.newInstance() );
wm.fireAllRules();
// Creates second class loader and use it to load fact classes
ClassLoader loader2 = new SubvertedClassLoader( new
URL[]{getClass().getResource( "/" ).toURI().toURL()},
this.getClass().getClassLoader() );
cheeseClass = loader2.loadClass( "org.drools.Cheese" );
conf = new PackageBuilderConfiguration( loader2 );
builder = new PackageBuilder( conf );
builder.addPackageFromDrl( new InputStreamReader(
getClass().getResourceAsStream( "test_Dynamic1.drl" ) ) );
rbconf = new RuleBaseConfiguration( loader2 );
ruleBase = RuleBaseFactory.newRuleBase( rbconf );
pkg = builder.getPackage();
ruleBase.addPackage( pkg );
wm = ruleBase.newStatefulSession();
wm.insert( cheeseClass.newInstance() );
wm.fireAllRules();
} catch ( ClassCastException cce ) {
cce.printStackTrace();
fail( "No ClassCastException should be raised." );
}
}
public void testClassLoaderSwitchsUsingContext() throws Exception {
try {
// Creates first class loader and use it to load fact classes
ClassLoader original = Thread.currentThread().getContextClassLoader();
ClassLoader loader1 = new SubvertedClassLoader( new
URL[]{getClass().getResource( "/" ).toURI().toURL()},
this.getClass().getClassLoader() );
Thread.currentThread().setContextClassLoader( loader1 );
Class cheeseClass = loader1.loadClass( "org.drools.Cheese" );
PackageBuilder builder = new PackageBuilder( );
builder.addPackageFromDrl( new InputStreamReader(
getClass().getResourceAsStream( "test_Dynamic1.drl" ) ) );
RuleBase ruleBase = RuleBaseFactory.newRuleBase();
Package pkg = builder.getPackage();
ruleBase.addPackage( pkg );
StatefulSession wm = ruleBase.newStatefulSession();
wm.insert( cheeseClass.newInstance() );
wm.fireAllRules();
// Creates second class loader and use it to load fact classes
ClassLoader loader2 = new SubvertedClassLoader( new
URL[]{getClass().getResource( "/" ).toURI().toURL()},
this.getClass().getClassLoader() );
Thread.currentThread().setContextClassLoader( loader2 );
cheeseClass = loader2.loadClass( "org.drools.Cheese" );
builder = new PackageBuilder( );
builder.addPackageFromDrl( new InputStreamReader(
getClass().getResourceAsStream( "test_Dynamic1.drl" ) ) );
ruleBase = RuleBaseFactory.newRuleBase();
pkg = builder.getPackage();
ruleBase.addPackage( pkg );
wm = ruleBase.newStatefulSession();
wm.insert( cheeseClass.newInstance() );
wm.fireAllRules();
Thread.currentThread().setContextClassLoader( original );
} catch ( ClassCastException cce ) {
cce.printStackTrace();
fail( "No ClassCastException should be raised." );
}
}
public class SubvertedClassLoader extends URLClassLoader {
private static final long serialVersionUID = 400L;
public SubvertedClassLoader(final URL[] urls,
final ClassLoader parentClassLoader) {
super( urls,
parentClassLoader );
}
protected synchronized Class loadClass(String name,
boolean resolve) throws
ClassNotFoundException {
// First, check if the class has already been loaded
Class c = findLoadedClass( name );
if ( c == null ) {
try {
c = findClass( name );
} catch( ClassNotFoundException e ) {
c = super.loadClass( name, resolve );
}
}
return c;
}
}
Can you please try out and let us know if it covers your scenarios?
Thanks,
Edson
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Fix For: 4.0.2
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
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11:35 a.m.
New subject: [JBoss JIRA] Closed: (JBRULES-1212) Rete throws NoClassDefFoundError when asserting facts with classess loaded by inaccessible classloader.
[ http://jira.jboss.com/jira/browse/JBRULES-1212?page=all ]
Mark Proctor closed JBRULES-1212.
---------------------------------
Resolution: Done
not heard this isn't fixed, so closing now.
Rete throws NoClassDefFoundError when asserting facts with classess
loaded by inaccessible classloader.
--------------------------------------------------------------------------------------------------------
Key: JBRULES-1212
URL: http://jira.jboss.com/jira/browse/JBRULES-1212
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Reteoo
Affects Versions: 4.0.1
Reporter: Alexander Gavrilov
Assigned To: Mark Proctor
Fix For: 4.0.2
Attachments: ReteShadowProxyTest.java
We using drools as part of security enfocement engine in our application, based on
Tapestry4 framework. Tapestry4 pages and components is abstract classes with some abstract
methods, for which tapestry generates implementation at runtime. For example, if i declare
page
public abstract SomePage extends BasePage {
}
Tapestry will generate class in default package like
public SomePage$_0 extends BasePage {
}
On page loading whe using instantiated page objects ans Drools Facts to ensure, that
current user has permissions to load this page. In the previos verions we used (3.0.6) all
worked fine. After update to version 4.0.1 whe got the NoClassDefFoundError when triyng
to assert Page object into working memory.
This is becouse tapestry creates classes for pages in private classloader, which is child
of the application classloader. When Drools tries to generate shadowing proxy for
generated Page class it generate code like
public class SomePage$_0ShadowProxy extends SomePage$_0 {
}
Later, when it tries to load this class with MapBackedClassLoader, it can not find
definition for class SomePage$_0 and throws NoClassDefFoundError. This type of error does
not handled correctly by drools.
--
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6804
days inactive
6817
days old
8 comments
3 participants
participants (3)
-
Alexander Gavrilov (JIRA) -
Edson Tirelli (JIRA)
-
Mark Proctor (JIRA)