Dear All,
This is my first post to this list so my apologies for any
conventions/rules I've inadvertently broken :-) My situation is as
follows: there is a commercial application called BlackBoard which is
used by universities to provide learning resources to students, it's
built upon Apache Tomcat and allows 3rd parties to develop "Building
Blocks" (separate tomcat webapps) which can be integrated into the main
BlackBoard application. As part of my Building Block I have a servlet
which creates a database (using the Cloudscape 10.0 library), and
despite a few hic-ups on the learning curve it uses Java commands to
create the database and it seemed to work fine.
However I've started throwing some bizarre LinkageError's (see subject)
when querying the database, and so I thought I'd try the latest
(10.1.1.0) Derby library except this time I get "SQL Exception: Java
exception: 'loader constraints violated when
linkingorg/apache/derby/iapi/sql/execute/NoPutResultSet class:
java.lang.LinkageError'" when I'm actually creating the tables and
inserting a value for the first time (this didn't cause any problems
with the Cloudscape library). If anybody has encountered anything like
this before then I'd appreciate any assistance - is it a bug or
something I'm doing wrong on my part? Is there a workaround? I
searched http://issues.apache.org/jira for LinkageError but nothing
seemed to be directly related.
Thanks in anticipation.
Simon Whittle
