Errors when querying. "ClientException: Failed to execute query: This 
connection has been closed."
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                 Key: NXP-7610
                 URL: https://jira.nuxeo.com/browse/NXP-7610
             Project: Nuxeo Enterprise Platform
          Issue Type: Bug
          Components: Search / Query, WebEngine
    Affects Versions: 5.4.1
         Environment: Ubuntu Linux 64 bit on VMWare ESX hypervisor (4 GB ram, 
2vCPU).  Postgres 8.4.
            Reporter: M Brown
            Priority: Major


When making a query, we sometimes receive, 
"org.nuxeo.ecm.core.api.ClientException: Failed to execute query: This 
connection has been closed."  Once the server starts throwing these exceptions, 
it continues to throw them on every call until it is restarted.

We are calling this from a WebEngine method.  The relevant part of our code is:

CoreSession session = WebEngine.getActiveContext().getCoreSession();
DocumentModelList documents = session.query(query, null, max, offset, true); 
<-- throws exception

The query is: SELECT * FROM Document WHERE ecm:fulltext = 'invoice' AND 
ecm:path STARTSWITH '/' AND ecm:mixinType = 'dataserv-searchable' ORDER BY 
dsc:last_name ASC

Are there any additional logging or diagnostic options we should turn on?

Stack trace is attached.



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