Add support to configure requests pool options

README.md

@@ -199,3 +199,25 @@ This README!
 - When the bot is been running and you put your PC to sleep, the async worker will bug out
   and intermittently crash the UI.
 - The Settings screen save functionality is currently disabled.
+
+### urllib pool connection errors
+
+When running a larger number of bots within one FTUI instance, you may see urllib/requests 
+warnings about the pool connections being exhausted:
+
+`connection pool is full, discarding connection: 127.0.0.1.  Connection pools size: 10`
+
+Raising the pool size limits can help avoid these warnings.
+
+There are two command line/yaml config options that can be adjusted:
+
+#### CLI
+
+`ftui -c config.json --pool_connections 20 --pool_maxsize 15`
+
+#### YAML config
+
+```yaml
+pool_connections: 20
+pool_maxsize: 15
+```

example.yaml

@@ -19,3 +19,7 @@ servers:
       port        : 8080
 
 debug: False
+
+# only uncomment these options if you are receiving urllib warnings about connection pool full
+# pool_connections: 30
+# pool_maxsize: 20

ftui/ftui.py

@@ -401,6 +401,14 @@ def setup(args):
 
     print(__doc__)
 
+    pool_connections = 20
+    if args.pool_connections:
+        pool_connections = args.pool_connections
+
+    pool_maxsize = 10
+    if args.pool_maxsize:
+        pool_maxsize = args.pool_maxsize
+
     if args.yaml:
         for s in args.servers:
             try:
@@ -411,6 +419,8 @@ def setup(args):
                     username=s["username"],
                     password=s["password"],
                     config_path=config,
+                    pool_connections=pool_connections,
+                    pool_maxsize=pool_maxsize,
                 )
 
                 client_dict[ftui_client.name] = ftui_client
@@ -419,7 +429,11 @@ def setup(args):
     else:
         if config is not None:
             try:
-                ftui_client = ftuic.FTUIClient(config_path=config)
+                ftui_client = ftuic.FTUIClient(
+                    config_path=config,
+                    pool_connections=pool_connections,
+                    pool_maxsize=pool_maxsize,
+                )
                 client_dict[ftui_client.name] = ftui_client
             except Exception as e:
                 raise RuntimeError("Cannot create freqtrade client") from e
@@ -439,6 +453,8 @@ def main():
     parser.add_argument("-v", "--verbose", action="store_true", help="Verbose debugging mode")
 
     parser.add_argument("-c", "--config", nargs="?", help="Config to parse")
+    parser.add_argument("--pool_connections", nargs="?", default=20, help="Number of pool connections")
+    parser.add_argument("--pool_maxsize", nargs="?", default=10, help="Pool cache maxsize")
 
     parser.add_argument(
         "-y", "--yaml", nargs="?", help="Supply a YAML file instead of command line arguments."

ftui/ftui_client.py

@@ -28,6 +28,8 @@ def __init__(
         password: Optional[str] = None,
         *,
         config_path=None,
+        pool_connections=20,
+        pool_maxsize=10,
     ):
         self.name = name
         self.url = url
@@ -37,6 +39,8 @@ def __init__(
         self.config_path = config_path
         self.rest_client = None
         self.config = None
+        self.pool_connections = pool_connections
+        self.pool_maxsize = pool_maxsize
 
         self.prev_closed_trade_count = 0
         self.all_closed_trades = []
@@ -65,7 +69,11 @@ def setup_client(self):
 
         server_url = f"http://{self.url}:{self.port}"
 
-        client = ftrc.FtRestClient(server_url, self.username, self.password)
+        client = ftrc.FtRestClient(server_url,
+                                   self.username,
+                                   self.password,
+                                   pool_connections=self.pool_connections,
+                                   pool_maxsize=self.pool_maxsize)
 
         if client is not None:
             c = client.version()