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From: Andreas Leitgeb <avl@logic.at>
Newsgroups: comp.lang.java.programmer
Subject: Re: Rabbit MQ JMS Client 2.3.0, JMS Queue connection error javax.naming.NoInitialContextException: Cannot instantiate class: com.rabbitmq.jms.admin.RMQObjectFactory [Root exception is java.lang.ClassCastException: com.rabbitmq.jms.admin.RMQObjectFactory
Date: Tue, 1 Feb 2022 14:25:19 -0000 (UTC)
Organization: A noiseless patient Spider
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Andreas Leitgeb <avl@logic.at> wrote:
> Surendra K <kvsbasis@gmail.com> wrote:
>> javax.naming.NoInitialContextException: Cannot instantiate
>> class: com.rabbitmq.jms.admin.RMQObjectFactory [Root exception is
>> java.lang.ClassCastException: com.rabbitmq.jms.admin.RMQObjectFactory
>> (loaded by library:com.sap.aii.adapter.lib.jms20@69499
>> com.sap.engine.boot.loader.ResourceMultiParentClassLoader) cannot be
>> cast to javax.naming.spi.InitialContextFactory (loaded by <bootstrap>)]"
>
> Looks like you configured "com.rabbitmq.jms.admin.RMQObjectFactory" as 
> value for some property within the application-context, but that property
> should have the name of a different class.
>
> The the correct class's name likely ends with *ContextFactory, rather
> than with *ObjectFactory.
>
> You might open the rabbitMQ-jarfile as a zip-file and list its contents.
> Maybe some class in it even has a name like "RMQContextFactory".

I googled some more, and found page:
   https://docs.parasoft.com/display/SVC20201/JMS+Provider+Configuration
(search for RabbitMQ within that page)

that seems to suggest:
   com.sun.jndi.fscontext.RefFSContextFactory
as the initial context factory.

Not sure if "com.sun.*" classes even exist any more...  but maybe thats
the starting point for another search, for the replacement.