Re: connection reset error, followed by broken pipe (pg74.213.jdbc3.jar)

Hi, Ed,

Ed Blackmore wrote:

> I wasn't able to nicely induce the error through our firewall or
> taking connections down, but restarting postgresql did lead to a
> broken pipe error. The above fix didn't help in this scenerio.
>
> Reading other posts it seems that the jdbc driver is not expected to
> reopen connections, therefore it doesn't seem using a newer version
> will help. Given that our tomcat app doesn't reconnect to a
> postgresql db after it (the database) has been restarted, is it
> correct I need to work with the app developer as to how we use the
> connection pool, or are there configuration changes that can help?

Yes, that's true.

My workaround protects against a pool handing out broken connections[1],
but the Application still must get a fresh connection ittself.

Most JSP pages and Servlets I've seen get such a connection on every
incoming request, most Servlets I've written refresh their connection
when an appropriate SQL exception happens.

I think that this is the way your app has to be modified - refresh the
SQL connection in case of an Exception.



HTH,
Markus

[1] Before java 1.6, the pool has no (easy and portable) way to tell
whether a connection is still valid.

--
Markus Schaber | Logical Tracking&Tracing International AG
Dipl. Inf.     | Software Development GIS

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