fix: flask_nameko add timeout error catch

chassis/flask_nameko/connection_pool.py

@@ -5,7 +5,7 @@ from threading import Lock
 
 from queue import Queue, Empty
 
-from .errors import ClientUnavailableError
+from .errors import ClientUnavailableError, ClientConnectionTimeoutError
 
 
 class Connection(object):
@@ -49,20 +49,28 @@ class ConnectionPool(object):
             self._queue.put(connection)
 
     def _make_connection(self):
-        ret = Connection(self._get_connection())
-        self._current_connections += 1
-        return ret
+        try:
+            connection = self._get_connection()
+            ret = Connection(connection)
+            self._current_connections += 1
+            return ret
+        except Exception as e:
+            raise ClientConnectionTimeoutError()
 
     def _delete_connection(self, connection):
         del connection
         self._current_connections -= 1
 
     def _recycle_connection(self, connection):
-        self._lock.acquire()
-        self._delete_connection(connection)
-        connection = self._make_connection()
-        self._lock.release()
-        return connection
+        try:
+            self._lock.acquire()
+            self._delete_connection(connection)
+            connection = self._make_connection()
+            return connection
+        except ClientConnectionTimeoutError as e:
+            pass
+        finally:
+            self._lock.release()
 
     def _get_connection_from_queue(self, initial_timeout, next_timeout):
         try:
@@ -79,6 +87,8 @@ class ConnectionPool(object):
                     return self._queue.get(True, next_timeout)
                 except Empty:
                     raise ex
+            except ClientConnectionTimeoutError as e:
+                raise ClientUnavailableError("making connection but timeout")
             finally:
                 self._lock.release()
 
@@ -98,7 +108,9 @@ class ConnectionPool(object):
             initial_timeout, next_timeout)
 
         if self._recycle and connection.is_stale(self._recycle):
-            connection = self._recycle_connection(connection)
+            recycled_connection = self._recycle_connection(connection)
+            if recycled_connection:
+                connection = recycled_connection
 
         return connection
 

chassis/flask_nameko/errors.py

@@ -7,4 +7,8 @@ class ClientUnavailableError(Exception):
 
 
 class ClusterNotConfiguredError(Exception):
+    pass
+
+
+class ClientConnectionTimeoutError(Exception):
     pass

chassis/flask_nameko/proxies.py

@@ -36,6 +36,7 @@ class PooledClusterRpcProxy(object):
 
     def _get_nameko_connection(self):
         proxy = ClusterRpcClient(
+            timeout=6,
             uri=self._config.get('uri')
         )
         return proxy.start()