Hi, 
 in some cases while performing a search giving an existing text i'm getting 
the following SQLException :

005:ip_addr=194.177.214.59:database_error:java.sql.SQLException: Query "MyText" 
returned unresolvable handle: 123456789/12322
java.sql.SQLException: Query "24 oikoi of the Virgin" returned unresolvable 
handle: 123456789/12322
        at 
org.dspace.app.webui.servlet.SimpleSearchServlet.doDSGet(SimpleSearchServlet.java:256)
        at 
org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:151)
        at 
org.dspace.app.webui.servlet.DSpaceServlet.doGet(DSpaceServlet.java:99)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
        at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
        at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)

Could anyone give me any advice why this happens and how can be avoided?
I have noticed that usually happens when the text i'm searching exists as is in 
a metadata field of an element.
Thanks a lot.
Ilias
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