Hi Jem,
Following on from this I am having a similar problem trying to use the
Jena Provider and HTTP connections via a proxy.
This time I am explictly setting proxy params using JVM -D flags:
VM params -> -Dhttp.proxyHost=www-cache.xxx.bbc.co.uk
-Dhttp.proxyPort=80
I receive errors as follows:
Begin read from 'http://www.w3.org/People/Berners-Lee/card#i'
Exception
in thread "main" virtuoso.jdbc3.VirtuosoException: HC001: Connection
Error in HTTP Client
at virtuoso.jdbc3.VirtuosoResultSet.process_result(Unknown
Source)
at virtuoso.jdbc3.VirtuosoResultSet.<init>(Unknown Source)
at virtuoso.jdbc3.VirtuosoStatement.sendQuery(Unknown Source)
at virtuoso.jdbc3.VirtuosoStatement.execute(Unknown Source)
at virtuoso.jena.driver.VirtGraph.read(Unknown Source)
at CreateAndQueryGraph.main(CreateAndQueryGraph.java:28)
com.hp.hpl.jena.shared.JenaException: rethrew:
virtuoso.jdbc3.VirtuosoException: HC001: Connection Error in HTTP
Client
at virtuoso.jena.driver.VirtGraph.read(Unknown Source)
at CreateAndQueryGraph.main(CreateAndQueryGraph.java:28)
Caused by: virtuoso.jdbc3.VirtuosoException: HC001: Connection Error
in
HTTP Client
at virtuoso.jdbc3.VirtuosoResultSet.process_result(Unknown
Source)
at virtuoso.jdbc3.VirtuosoResultSet.<init>(Unknown Source)
at virtuoso.jdbc3.VirtuosoStatement.sendQuery(Unknown Source)
at virtuoso.jdbc3.VirtuosoStatement.execute(Unknown Source)
... 2 more
Is there another -D flag I should be using? Or as I expect is this
again
related to proxy configuration for the Virtuoso server?
I suspect functions such as http_client etc are being utilised under
the
hood?
FYI: The JAVA code used is below (example Jena code).
It should be noted that my web browser works with the contained urls
and
is configured to go via a proxy.
This is beginning to slow down my evaluation as all http access must
go
through this proxy.
The same would be true in a test/prod environment.
I would expect this to be done in the virtuoso server.
I am currently discussing the various options with the Virtuoso
development team.
Will let you know the moment i know more about this.
Patrick
