When I use tornado web server, logs show this error. How can I resolve it?

Question

[W 200709 09:47:12 iostream:887] Write error on <socket. socketobject object at 0x36c2910>: [Errno 113] No route to host [I 200709 09:47:12 web:2064] 200 GET /templates/js/system/sytemlog-control.js? =1594259185262 (10.2.26.57) 8.45ms [I 200709 09:47:12 web:2064] 304 GET /templates/html/main.html?u=system/systemlog (10.12.33.99) 7.92ms [W 200709 09:47:13 iostream:887] Write error on <socket._socketobject object at 0x36c2ad0>: [Errno 113] No route to host [W 200709 09:47:13 iostream:887] Write error on <socket._socketobject object at 0x36c2c90>: [Errno 113] No route to host [W 200709 09:47:13 iostream:887] Write error on <socket._socketobject object at 0x36c2d00>: [Errno 113] No route to host [W 200709 09:47:14 iostream:887] Write error on <socket. socketobject object at 0x36c2ec0>: [Errno 113] No route to host [I 200709 09:47:14 web:2064] 200 GET /templates/js/system/sytemlog-control.js? =1594259245749 (10.12.33.99) 1.74ms [W 200709 09:47:15 iostream:887] Write error on <socket._socketobject object at 0x36c2fa0>: [Errno 113] No route to host [W 200709 09:47:16 iostream:887] Write error on <socket._socketobject object at 0x3610f30>: [Errno 113] No route to host [W 200709 09:47:17 iostream:887] Write error on <socket._socketobject object at 0x36108a0>: [Errno 113] No route to host [I 200709 09:47:18 web:2064] 200 POST /auth/system/log?list.callback=jQuery2140877480096841464_1594259245751 (10.12.33.99) 242:50ms [W 200709 09:47:18 iostream.887] Write error on <socket:_socketobject object at 0x3610050>: [Errno 113] No route to host [W 200709 09:47:19 iostream.887] Write error on <socket:_socketobject object at 0x3610210>: [Errno 113] No route to host [W 200709 09:47:20 iostream.887] Write error on <socket: _socketobject object at 0x3610130>: [Errno 113] No route to host [W 200709 09:47:21 iostream.887] Write error on <socket:_socketobject object at 0x3610c90>: [Errno 113] No route to host [W 200709 09:47:22 iostream.887] Write error on <socket:_socketobject object at 0x36103d0>: [Errno 113] No route to host

Answer 1

Without further information it is quite simply that the ability for the Tornado server to connect via this socket has been lost.

This assumes there was a connection open between the Tornado server and something else (by the context of what you said): has the network been changed? Have you shut a dependency down that the Tornado server relies on??? Has a shared socket based filesystem disappeared???

I hope this helps, but basically somewhere in your Tornado servers world a connection has been broken.

Best of luck!