Re: pgsql jdbc db connection weird behaviour

Even if there was a duplicate the Jdbc4Connection should be able to be cast.

Dave Cramer

dave.cramer(at)credativ(dot)ca
http://www.credativ.ca

On Sun, Mar 30, 2014 at 2:47 AM, Venkateswar Reddy Melachervu <
vmelachervu(at)gmail(dot)com> wrote:

> Steve,
> I've checked it - appears no duplicate jdbc drivers..:-(
>
>
> On Sun, Mar 30, 2014 at 10:59 AM, Steven Schlansker <
> stevenschlansker(at)gmail(dot)com> wrote:
>
>>
>> On Mar 30, 2014, at 12:10 AM, Venkateswar Reddy Melachervu <
>> vmelachervu(at)gmail(dot)com> wrote:
>>
>> > Hello PGSQL Community,
>> > Love pgsql. But facing this weird problem (detailed below) for past
>> couple of days with pgsql jdbc41 driver with tomcat 8 connection pooling on
>> on jvm1.8 (all on x64 windows 8) with no resolution in sight for casting a
>> jdbc db tomcat pooled connection to PGConnection hitting the wall.
>> >
>> > I am sure not sure if I am doing something silly or it is the
>> limitation of pgsql jdbc41 driver. Did any one face any such issue? Does
>> any one know some way out for this?
>> >
>> > Problem:
>> > When I try to cast a DB Connection obtained using tomcat jdbc resource
>> (pooled) to org.postgresql.PGConnection, of course after unwrapping it,
>> execution is running into exception with the message:
>> (java.lang.ClassCastException) java.lang.ClassCastException:
>> org.postgresql.jdbc4.Jdbc4Connection cannot be cast to
>> org.postgresql.PGConnection
>>
>> Almost always this is caused by having more than one driver jar file
>> available in your class path. In particular, bundling a driver in the
>> Tomcat lib/ directory as well as within your application itself is sure to
>> cause problems.
>>
>> That's where I would look first.
>>
>> Hope that helps,
>> Steven
>>
>>
>
>
> --
> Regards,
> Venkateswar Reddy Melachervu
> "...dare to dream, care to win..."
> www.linkedin.com/in/vmelachervu
>