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From "Phil Steitz (JIRA)" <>
Subject [jira] [Resolved] (DBCP-427) Examines 'SQLException's thrown by underlying connections or statements for fatal (disconnection) errors
Date Wed, 28 Jan 2015 13:37:34 GMT


Phil Steitz resolved DBCP-427.
    Resolution: Fixed

Modified version of the patch committed in r1655301. 

Modifications were to make the behavior configurable.  I added fastFailValidation property
to turn on/off the failfast validation and I also added support for user-supplied sets of
fatal disconnection SQL_STATE codes.

Thanks for the patch!

> Examines 'SQLException's thrown by underlying connections or statements for fatal (disconnection)
> --------------------------------------------------------------------------------------------------------
>                 Key: DBCP-427
>                 URL:
>             Project: Commons Dbcp
>          Issue Type: Improvement
>    Affects Versions: 2.0
>            Reporter: Vladimir Konkov
>            Priority: Minor
>             Fix For: 2.1
>         Attachments: DBCP-427_initial_impl.diff
> Affected cases:
> 1. Ability to detect severed connection without need for validity check (it can be time
> 2. Not all fatal errors detected with simple validation query or isValid() call. For
> Broken XA connections of MS SQL Server and Oracle Database (and may be other) pass validation
for both isValid() and simple validation query such as 'SELEC 1 FROM DUAL' but throw fatal
errors on data and/or transaction manipulation calls. Such errors gone only after reconnect.
In case of use DBCP for polling application has no chance to cleanup broken connection.
> By providing infractructure for check thrown exceptions and mark PoolableConnection as
poisoned we can cleanup pool on validation phase.

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