[jira] Updated: (DBCP-180) [dbcp] Dbcp doesn't meet JDBC specification

["Phil Steitz (JIRA)" <ji...@apache.org>]

     [ http://issues.apache.org/jira/browse/DBCP-180?page=all ]

Phil Steitz updated DBCP-180:
-----------------------------

      Bugzilla Id:   (was: 31569)
    Fix Version/s: 1.3

If a safe and efficient patch is submitted to enable this enhancement, we can include it in 1.3.  Per Yoav's comment, the patch should not rely on AbandonedTrace.

> [dbcp] Dbcp doesn't meet JDBC specification
> -------------------------------------------
>
>                 Key: DBCP-180
>                 URL: http://issues.apache.org/jira/browse/DBCP-180
>             Project: Commons Dbcp
>          Issue Type: Improvement
>    Affects Versions: 1.2
>         Environment: Operating System: other
> Platform: All
>            Reporter: Rohan Lenard
>            Priority: Minor
>             Fix For: 1.3
>
>
> The JDBC specification says for ResultSet and Statement that the ResultSet and 
> Statement will be automatically closed when garbage collected.
> This means that people often write code like this
> Connection.getStatement().executeSQL("....");
> However, because the DelegateConnection/DelegateStatement/DelegateResultSet 
> extend AbandonedTrace (and are linked into the abandoned trace mechanism) they 
> will not be garbage collected until the connection is closed.
> This of course means that DBCP holds on to lots of memory that it shouldn't do 
> (I've had people complain to me of memory leaks).
> Surely it's possible to make the DelegateXX hold onto something else which does 
> the AbandonedTrace and so when it is released it can do the implicit close and 
> then everything will be coool.

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