Calvin Moody created AMQ-4746:
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Summary: Applet ClassLoader Problems
Key: AMQ-4746
URL: https://issues.apache.org/jira/browse/AMQ-4746
Project: ActiveMQ
Issue Type: Bug
Components: JMS client
Affects Versions: 5.7.0
Environment: Windows 7, Java 1.7 or 1.6, Applet
Reporter: Calvin Moody
In ClassLoadingAwareObjectInputStream.java the load() method makes a call to
Class.forName().
For the primitive types (int, boolean, etc.) this would result in a call
similar to:
Class.forName("int", false, loader); //Where loader is the
Applet2ClassLoader
Since Applet2ClassLoader is a URLClassLoader and "int.class" is not in the jar
cache it pulled down from the server at the start of application, it is going
to try and go to the server to resolve this class.
In the event of a network failure, this will result in the ClassLoader having
to wait for the socket timeout. (see stacktrace in previous post) Once this
socket timeout occurs, the load() method then attempts to lookup the class in
the primitive HashMap that is statically initialized. This returns the class
for the int and the deserialization continues on.
At first it seemed like the messages were failing to be received but it turned
out they were just taking a very long time to be deserialized. This problem can
be avoided by changing the order in which ClassLoadingAwareObjectInputStream
tries to resolve the class.
Here is the change I made to the load() method:
http://activemq.2283324.n4.nabble.com/Applet-Class-Loader-Problems-td4671835.html
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