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From "Mark Thomas (JIRA)" <>
Subject [jira] Commented: (DBCP-143) [dbcp] SQLNestedException thrown by server causes client ClassNotFoundException.
Date Sun, 15 Mar 2009 22:24:50 GMT


Mark Thomas commented on DBCP-143:

Forgot to include this:

See for further discussion on this very topic.

> [dbcp] SQLNestedException thrown by server causes client ClassNotFoundException.
> --------------------------------------------------------------------------------
>                 Key: DBCP-143
>                 URL:
>             Project: Commons Dbcp
>          Issue Type: Bug
>         Environment: Operating System: other
> Platform: Other
>            Reporter: Andreas Krüger
>             Fix For: 2.0
>         Attachments: DBCP-143.patch
> This is a GUI client / application server / database server application.
> On the GUI client side, we see java.lang.ClassNotFoundException:
> org.apache.commons.dbcp.SQLNestedException.
> This happens when the database server is down, DBCP cannot connect to the
> database, and throws a org.apache.commons.dbcp.SQLNestedException.
> Our application server code sends the java.sql.SQLException it sees to the
> client via RMI.
> However, on the client, we have not provided commons-dbcp.jar.
> And I don't think we should - DBCP is server code.
> But, when the client does not have SQLNestedException's class file, the attempt
> to de-serialize it results in the ClassNotFoundException we've been seeing.
> Even old has
> the facilities that SQLNestedExcepion offers: It is able to chain another
> SQLException to itself. So while SQLNestedException clearly causes problems, I
> don't understand what DBCP gains from it.
> What would we loose if it were scratched?

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