Subject RE: [IB-Java] Re: problems with connections in v1.6
Author Peter Wilkinson
One last thing, the situation with delayed connections gets worse as the
number of already connected sessions increases, even when the session do
nothing but stay connected.

-----Original Message-----
From: Torsten Welches [mailto:torsten.welches@...]
Sent: Thursday, 10 August 2000 6:18 PM
Subject: [IB-Java] Re: problems with connections in v1.6

--- In, "Shaunak Mistry" <smistry@i...> wrote:
> Peter Wilkinson wrote:
> >
> > Hi,
> > I'm trying to debug a strange situation when using the following:
> > JRun Servlet Engine 3 with a pool of connections -> Interclient
1.6 ->
> > Interbase SuperServer 6 all on the same machine and all running
on Linux
> > (I've tried Sun's JDK and IBM JDK both v1.3)
> Peter,
> Interclient 1.6 has been certified with JDK 1.2 not 1.3. Have you
> tried it with JDK 1.2?
> If this is happening with JDK 1.2 then it should be a bug in IC.

I doubt that this is a 1.2 vs. 1.3 problem. There's nothing
new/changed in 1.3 I could think of that would cause problems like
the described. In fact IC16 does not even use any JDK 1.3 or 1.2
features, not even 1.1! I guess you could still compile IC16 under
JDK 1.0, that's why so many deprecations show up under 1.1 and higher.

Having said that I also doubt that it is a bug in IC itself. Since
InterClient does not talk to the Interbase server directly it is not
likely that it can lock it up. IMO InterServer would be a more likely
If it would be a JRun/InterClient threading problem (e.g. deadlock)
JRun and the affected InterClient connection would lock, but why
would Interbase?

BTW - InterServer (I'm under NT) spawns a whole new NT-Process
(rather then only a new thread as I had expected) for each
InterClient connection. Why is that?

Here's a test to do multi-threaded InterClient connections to
InterServer. I did not have any problems, even with a bigger number
(say 50) of concurrent connections. Maybe you can use it for your
debugging, Peter. I run it both under 1.2.2 and 1.3