[arquillian-issues] [JBoss JIRA] (ARQ-1437) NPE in ExceptionProxy.readExternal() for root cause leads to deserializationProblem = true
Falko M. created ARQ-1437:
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Summary: NPE in ExceptionProxy.readExternal() for root cause leads to
deserializationProblem = true
Key: ARQ-1437
URL: https://issues.jboss.org/browse/ARQ-1437
Project: Arquillian
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: 1.1.0.Final, 1.0.2.Final
Reporter: Falko M.
Priority: Minor
See line 199 (for 1.0.2.Final):
{code}
// reset the cause, so we can de-serialize them individual
SecurityActions.setFieldValue(Throwable.class, original, "cause",
causeProxy.createException());
{code}
For the root cause of an exception, {{causeProxy}} will always be {{null}} and so a
{{NullPointerException}} is thrown.
As the code is wrapped in a try block with follwoing catch block:
{code}
catch (Throwable e) // ClassNotFoundExcpetion / NoClassDefFoundError
{
// ignore, could not load class on client side, move on and create a fake
'proxy' later
deserializationProblem = true;
}
{code}
the NPE is caught and is "expected" to be a {{ClassNotFoundExcpetion}} or
{{NoClassDefFoundError}} which is clearly not the case.
*Possible fix:*
{{original.cause}} should only be overwritten when {{causeProxy}} is *not* null.
*More context information:*
I came across this problem while trying to find the reason for an unexpected
{{ArquillianProxyException}}:
{code}org.jboss.arquillian.test.spi.ArquillianProxyException: javax.ejb.EJBException :
javax.persistence.OptimisticLockException [Proxied because : Original exception not
deserilizable, ClassNotFoundException]{code}
The root problem was not the NPE, but the {{ClassNotFoundException}} mislead me and so I
debugged {{ExceptionProxy}}.
I my case there is an {{InvalidClassException}} because of an older hibernate version on
the client side.
+So that is another problem of {{ExceptionProxy}} as it assumes that only
{{ClassNotFoundExcpetion}} or {{NoClassDefFoundError}} can occur!+
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