potential fix for #2323 (#2324)

* potential fix for #2323

* Update DbCursor.py

* replaced RLock with Lock

src/Db/DbCursor.py

@@ -1,6 +1,7 @@
 import time
 import re
 import gevent
+from gevent._threading import Lock
 from util import helper
 
 
@@ -14,6 +15,7 @@ class DbCursor:
         self.db = db
         self.cursor = conn.cursor()
         self.logging = False
+        self.lock = Lock()
 
     def quoteValue(self, value):
         if type(value) is int:
@@ -99,6 +101,8 @@ class DbCursor:
 
         s = time.time()
         
+        try:
+            self.lock.acquire(True)
             if params:  # Query has parameters
                 res = self.cursor.execute(query, params)
                 if self.logging:
@@ -107,6 +111,8 @@ class DbCursor:
                 res = self.cursor.execute(query)
                 if self.logging:
                     self.db.log.debug(query + " (Done in %.4f)" % (time.time() - s))
+        finally:
+            self.lock.release()
 
         # Log query stats
         if self.db.collect_stats: