Hugh,
I figured it out. I used interactive Python to prove the port was open, and
then discovered my own web app was overriding the serverName I set in the
Tomcat resource.
________________________________________
From: Hugh Williams [hwilli...@openlinksw.com]
Sent: Thursday, August 11, 2016 9:47 AM
To: Davis, Daniel (NIH/NLM) [C]
Cc: virtuoso-users
Subject: Re: [Virtuoso-users] Debugging JDBC Virtuoso connection
Hi Daniel,
So the same application using the same JDBC connect string work on localhost
where Virtuoso runs, but not from remote client ?
I once had same problem when java runtime was trying to make ipv6 connection
from remote host and was getting “network is unreachable” type error and had to
disable ivp6 on the localhost machine Virtuoso was running on. So wondering if
you might be having similar problem ? I trace the cause with strace using
command like:
strace -f -v -o <output-filename> -s 1500 java -cp "virtjdbc4.jar:.”
sample.java
which showed something like:
10738 connect(8, {sa_family=AF_INET6, sin6_port=htons(1168), inet_pton(AF_INET6,
"::ffff:127.0.0.1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 EN
ETUNREACH (Network is unreachable)
BTW, I assume you JDBC connect string is using the actual machine hostname or
IP address and not “localhost” from when is was just being run locally ?
Best Regards
Hugh Williams
Professional Services
OpenLink Software, Inc. // http://www.openlinksw.com/
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On 10 Aug 2016, at 16:48, Davis, Daniel (NIH/NLM) [C]
<daniel.da...@nih.gov<mailto:daniel.da...@nih.gov>> wrote:
I’ve done my UI using Java Spring, but so far, I’ve been doing it as an old
dinosaur, running my build and my changes on the Linux host where Virtuoso is
running.
Now, I’m trying to use Virtuoso remotely from another host.
>From Python, I can connect to port 1111, but when I try to connect to Virtuoso
>from Java, it does not seem to be working.
I would prefer to enable some logging from Virtuoso JDBC to see what the
problem is – it is throwing connection refused, but the connection should be
open.
What is it actually trying to connect with?
Thanks,
Dan Davis, Systems/Applications Architect (Contractor),
Office of Computer and Communications Systems,
National Library of Medicine, NIH
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