I finally implemented in JayBird the jca feature whereby the driver
notifies the app server it is running in when a connection experiences a
fatal error and needs to be closed. I based this on a list of isc_error
codes that looked fatal to me. However, I'm by no means an expert on the
meaning of most of these.

So, I would really appreciate review by firebird experts. I probably
included non-fatal errors and left out fatal ones.

The list is a static array at the end of
client-java/src/main/org/firebirdsql/gds/ISCConstants.java

Many many thanks
david jencks