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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4443) Wrap rollback in exception handlers in try-catch
Date Wed, 16 Mar 2011 14:39:29 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13007489#comment-13007489
] 

Bryan Pendleton commented on DERBY-4443:
----------------------------------------

I think this may be rather tricky. Perhaps other developers have a good idea. One technique,
which is artificial, is to deliberate modify the code for rolllback so that it fails. Of course,
that would not be a permanent change, just a temporary one so that you can exercise your
other altered code paths.

I suspect that this modification may be rather a hard one to test, unfortunately, so you
may have to resort to some unusual techniques.

> Wrap rollback in exception handlers in try-catch
> ------------------------------------------------
>
>                 Key: DERBY-4443
>                 URL: https://issues.apache.org/jira/browse/DERBY-4443
>             Project: Derby
>          Issue Type: Bug
>          Components: Demos/Scripts, Documentation, Eclipse Plug-in, JDBC, Network Client,
Network Server, Replication, Services, SQL, Test, Tools
>    Affects Versions: 10.5.3.0
>            Reporter: Aaron Digulla
>              Labels: derby_triage10_8
>         Attachments: DERBY-4443.patch
>
>
> Avoid this pattern everywhere:
> 		}catch(SQLException se){
> 			//issue a rollback on any errors
> 			conn.rollback();
> 			throw  se;
> 		}
> because an error in rollback will shadow the original exception.

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