[Virtuoso-users] Exception when using concurrent JDBC connections

[Alexander De Leon]

Hi,
Does Virtuoso 6 supports concurrent JDBC connections? When I try to  
execute simultaneous operations (either from multiples threads or  
multiple processes) I get the following exception:

Caused by: com.hp.hpl.jena.update.UpdateException: Convert results are  
FAILED.:
        at virtuoso.jena.driver.VirtuosoUpdateRequest.exec(Unknown Source)
	at  
com 
.dumontierlab 
.pdb2rdf 
.dao 
.impl 
.VirtuosoTripleStoreDaoImpl.clearGraph(VirtuosoTripleStoreDaoImpl.java: 
62)
        ... 3 more
Caused by: virtuoso.jdbc3.VirtuosoException: SR172: Transaction  
deadlocked
        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)
        ... 5 more


Any advice how to use the JDBC driver from a muti-threaded program  
would be much appreciated.

Thanks,
Alex