logs: fix race condition when resetting logger

git-svn-id: https://svn.erp5.org/repos/neo/trunk@2747 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/lib/__init__.py

@@ -40,7 +40,11 @@ def setupLog(name='NEO', filename=None, verbose=False):
         level = logging_std.INFO
     if logging is not None:
         for handler in logging.handlers:
+            handler.acquire()
+            try:
                 handler.close()
+            finally:
+                handler.release()
         del logging.manager.loggerDict[logging.name]
     logging = logging_std.getLogger(name)
     for handler in logging.handlers[:]: