Ref: https://sourceforge.net/p/exist/mailman/message/26727507/
Quote
The XMLRPC server will cache query results for max. 3 minutes and free them afterwards. This timeout is set to avoid memory issues if the client fails to explicitly release query results. The timeout is not configurable, but if you really need to extend it, you can change the constant TIMEOUT in org.exist.xmlrpc.QueryResultCache.
Ref: http://exist-db.org/exist/apps/doc/devguide_xmldb.xml
Free resource
if(res != null) {
try { ((EXistResource)res).freeResources(); } catch(XMLDBExcepti
on xe) {xe.printStackTrace();}
}
if(col != null) {
try { col.close(); } catch(XMLDBException xe) {xe.printStackTrac
e();}
}
}
org.xmldb.api.base.XMLDBException: Failed to invoke method retrieveFirstChunk in class org.exist.xmlrpc.RpcConnection: result set unknown or timed out: 220
at org.exist.xmldb.AbstractRemoteResource.getRemoteContentIntoLocalFile(AbstractRemoteResource.java:374)
at org.exist.xmldb.AbstractRemoteResource.getStreamContentInternal(AbstractRemoteResource.java:497)
at org.exist.xmldb.RemoteXMLResource.getStreamContent(RemoteXMLResource.java:466)
at org.exist.xmldb.RemoteXMLResource.getContentAsDOM(RemoteXMLResource.java:161)
