FIX: Use a separate error handler for the Pushbullet backend that doesn't raise another exception (prevents maximum recursion errors in the logs caused by the interpreter entering an infinite loop of error handlers)

platypush/backend/pushbullet/__init__.py

@@ -135,6 +135,20 @@ class PushbulletBackend(Backend):
 
         return callback
 
+    def on_error(self, *_):
+        def callback(*args):
+            self.logger.error(f'Pushbullet error: {args}')
+            try:
+                if self.listener:
+                    self.listener.close()
+            except Exception as e:
+                self.logger.error('Error on Pushbullet connection close upon error')
+                self.logger.exception(e)
+            finally:
+                self.listener = None
+
+        return callback
+
     def on_open(self):
         def callback(*_):
             self.logger.info('Pushbullet service connected')
@@ -149,7 +163,7 @@ class PushbulletBackend(Backend):
                                  on_push=self.on_push(),
                                  on_open=self.on_open(),
                                  on_close=self.on_close(),
-                                 on_error=self.on_close(),
+                                 on_error=self.on_error(),
                                  http_proxy_host=self.proxy_host,
                                  http_proxy_port=self.proxy_port)