Bokeh raises Token is Expired exception

[henrykotze]

For logs which are large, and takes time to fully load the webapp results in Bokeh throwing "Token is expired" exception. This occurs when I run the webapp locally and launch it using the ./serve -f /path/to/ulog.ulg

The console output is the following:

ERROR:tornado.application:Uncaught exception GET /plot_app/ws?log=/home/$USER/Desktop/2022-03-04/05_57_54.ulg (127.0.0.1)
HTTPServerRequest(protocol='http', host='localhost:5006', method='GET', uri='/plot_app/ws?log=/home/$USER//Desktop/2022-03-04/05_57_54.ulg', version='HTTP/1.1', remote_ip='127.0.0.1')
Traceback (most recent call last):
  File "/home/$USER//.local/lib/python3.8/site-packages/tornado/websocket.py", line 954, in _accept_connection
    open_result = handler.open(*handler.open_args, **handler.open_kwargs)
  File "/home/$USER//.local/lib/python3.8/site-packages/tornado/web.py", line 3173, in wrapper
    return method(self, *args, **kwargs)
  File "/home/$USER//.local/lib/python3.8/site-packages/bokeh/server/views/ws.py", line 149, in open
    raise ProtocolError("Token is expired.")
bokeh.protocol.exceptions.ProtocolError: Token is expired.
WARNING:tornado.access:404 GET /favicon.ico (127.0.0.1) 0.88ms

The program than just waits here indefinitely with the web application waiting on "Loading Plots"

[bkueng]

Can you check if there's a timeout we can increase?

[henrykotze]

Here are relevant links which help me solved the issue:
bokeh-server-2-0-0-session-expiration-duration
slow-response-protocol-exceptions-protocol-error-token-is-expired

I had to increase the DEFAULT_SESSION_TOKEN_EXPIRATION global variable which is used for the parameter session_token_expiration in the BokehTornado object. BokehTornado. Thus I increased the global variable in the bokeh/server/tornado.py file in my local user path.

I dont see a way how to increase this parameter from flight review without extending bokeh to provide access to this variable from the bokeh.server.server object (Server)which is called from the serve.py file.

[bkueng]

It looks like you can just pass it in:

diff --git a/app/serve.py b/app/serve.py
index 0abc47f..6e8293d 100755
--- a/app/serve.py
+++ b/app/serve.py
@@ -95,6 +95,7 @@ server_kwargs['websocket_max_message_size'] = 100 * 1024 * 1024

 # increase the maximum upload size (default is 100MB)
 server_kwargs['http_server_kwargs'] = {'max_buffer_size': 300 * 1024 * 1024}
+server_kwargs['session_token_expiration'] = 300


 show_ulog_file = False

[henrykotze]

Interesting, I thought I tried that, and it didn't work. Will inspect and report.

[bkueng]

Did it work?