Simple script to reproduce the ORA-28576 error with the HTM module:

  ORA-28576: lost RPC connection to external procedure agent

rpcTimeOutTest.py

+from common.database.Database import database
+import sys,time
+
+"""
+This is a script to reproduce the following error:
+  ORA-28576: lost RPC connection to external procedure agent
+
+This occurs when accessing specific HTM functions with more than
+30 minutes delay.
+"""
+
+
+# Simple function to do queries
+def do_query(q):
+    database.connect()
+    c = database.cursor()
+    c.execute(q)
+    results = c.fetchall()
+    c.close()
+    return results
+
+# Determine what query we want to test
+if not len(sys.argv) == 2:
+    print """Usage: "awe %s <number>" where number is
+  1 for simple query of a SourceList
+  2 for NeighBoursTest query
+  3 for RadiusTest query""" % (sys.argv[0])
+    sys.exit()
+
+if sys.argv[1] == '2':
+    # This query will fail the second time
+    query = 'SELECT * FROM TABLE(AWOPER.AW_UTIL.NEIGHBOURSTEST(4067390, 9, 9))'
+    
+elif sys.argv[1] == '3':
+    # This query will also fail
+    query = 'SELECT * FROM TABLE(AWOPER.AW_UTIL.RADIUSTEST(15, 243.000000, 27.000000, 5.000000/3600.0))'
+    
+else:
+    # This query will succeed
+    query = 'SELECT "SLID","SID","HTM" FROM AWOPER."SOURCELIST*SOURCES" T WHERE T.SLID = 136111 AND T.SID = 10'
+
+
+# Tell the user about the query
+print "query:",query
+
+# Do the query for the first time, will always work
+data1 = do_query(query)
+print "data1: %i rows" % (len(data1))
+
+# The RPC Timeout will occur after about half an hour
+print "sleeping for 35 minutes"
+minutes = 35
+for i in range(minutes):
+        print "sleeping minute %i/%i" % (i,minutes)
+        time.sleep(60)
+
+
+# Try again, it will fail in query 2 and 3
+data2 = do_query(query)
+print "data2: %i rows" % (len(data2))
+
+# cx_Oracle.DatabaseError: ORA-28576: lost RPC connection to external procedure agent
+
+
+