[Mulgara-dev] Blank Nodes

[David Moll]

All right, we've been working on this:
....

  delete
    select $subject <http://www.viewpoint.com/aFile> $object
    from <rmi://localhost/server1#the_model>
    where $subject <http://www.viewpoint.com/aFile> $object
      minus $object <rdf:type> <mulgara:uriReference> in
<rmi://localhost/server1#type>
  from <rmi://localhost/server1#the_model>;

.....
This query works great, I can limit the nodes down and find exactly what
I need.  This query even works if subject, predicate, and object is
unbound.  However if I run the following queries:


    select $subject $predicate $object
    from <rmi://localhost/server1#the_model>
    where $subject $predicate $object
      minus ($object <rdf:type> <mulgara:uriReference> in
<rmi://localhost/server1#type>
          or $object <rdf:type> <rdfs:Literal> in
<rmi://localhost/server1#type>)

    select $subject $predicate $object
    from <rmi://localhost/server1#the_model>
    where $subject $predicate $object
      minus ($subject <rdf:type> <mulgara:uriReference> in
<rmi://localhost/server1#type>
          or $ subject <rdf:type> <rdfs:Literal> in
<rmi://localhost/server1#type>)


Both of these queries fail with...

java.lang.Error: Cleaner terminated abnormally
        at sun.misc.Cleaner$1.run(Cleaner.java:130)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.misc.Cleaner.clean(Cleaner.java:127)
        at
java.lang.ref.Reference$ReferenceHandler.run(Reference.java:124)
Caused by: java.io.IOException: The process cannot access the file
because another process has locked a portion of the file
        at sun.nio.ch.FileChannelImpl.unmap0(Native Method)
        at
sun.nio.ch.FileChannelImpl.access$000(FileChannelImpl.java:26)
        at
sun.nio.ch.FileChannelImpl$Unmapper.run(FileChannelImpl.java:680)
        at sun.misc.Cleaner.clean(Cleaner.java:125)
        ... 1 more

It's the same issue we occasionally run into with the memory mapping in
Windows causing the JVM to crash.

This is the latest release running on win2k3 server.  Thoughts?