# Spawn failed: Server at http://127.0.0.1:39145/user/sramineni/ didn't respond in 300 seconds

**URL:** <https://discourse.jupyter.org/t/spawn-failed-server-at-http-127-0-0-1-39145-user-sramineni-didnt-respond-in-300-seconds/12366>\
**Category:** JupyterHub\
**Tags:** community, jupyterhub, how-to, help-wanted\
**Created:** [December 28, 2021, 6:14pm UTC](https://discourse.jupyter.org/t/spawn-failed-server-at-http-127-0-0-1-39145-user-sramineni-didnt-respond-in-300-seconds/12366 "2021-12-28T18:14:56Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![saritha](https://avatars.discourse-cdn.com/v4/letter/s/bbce88/32.png) [@saritha](https://discourse.jupyter.org/u/saritha)\
**Post date:** [December 28, 2021, 6:14pm UTC](https://discourse.jupyter.org/t/spawn-failed-server-at-http-127-0-0-1-39145-user-sramineni-didnt-respond-in-300-seconds/12366/1 "2021-12-28T18:14:56Z")

</div>

[I 2021-12-28 16:56:30.168 JupyterHub app:2766] Running JupyterHub version 2.1.0.dev  
[I 2021-12-28 16:56:30.169 JupyterHub app:2797] Using Authenticator: jupyterhub.auth.PAMAuthenticator-2.1.0.dev  
[I 2021-12-28 16:56:30.169 JupyterHub app:2797] Using Spawner: jupyterhub.spawner.SimpleLocalProcessSpawner-2.1.0.dev  
[I 2021-12-28 16:56:30.169 JupyterHub app:2797] Using Proxy: jupyterhub.proxy.ConfigurableHTTPProxy-2.1.0.dev  
[I 2021-12-28 16:56:30.177 JupyterHub app:1606] Loading cookie\_secret from /home/ec2-user/jupyterhub/jupyterhub\_cookie\_secret  
[I 2021-12-28 16:56:30.314 JupyterHub proxy:496] Generating new CONFIGPROXY\_AUTH\_TOKEN  
[I 2021-12-28 16:56:30.327 JupyterHub app:1925] Not using allowed\_users. Any authenticated user will be allowed.  
[I 2021-12-28 16:56:30.357 JupyterHub app:2838] Initialized 0 spawners in 0.003 seconds  
[W 2021-12-28 16:56:30.361 JupyterHub proxy:688] Running JupyterHub without SSL. I hope there is SSL termination happening somewhere else…  
[I 2021-12-28 16:56:30.361 JupyterHub proxy:691] Starting proxy @ http://:8000  
16:56:30.506 [ConfigProxy] info: Proxying http://\*:8000 to (no default)  
16:56:30.513 [ConfigProxy] info: Proxy API at [http://127.0.0.1:8001/api/routes](http://127.0.0.1:8001/api/routes)  
16:56:30.719 [ConfigProxy] info: 200 GET /api/routes  
[I 2021-12-28 16:56:30.719 JupyterHub app:3084] Hub API listening on [http://127.0.0.1:8081/hub/](http://127.0.0.1:8081/hub/)  
16:56:30.722 [ConfigProxy] info: 200 GET /api/routes  
[I 2021-12-28 16:56:30.722 JupyterHub proxy:431] Adding route for Hub: / =\> [http://127.0.0.1:8081](http://127.0.0.1:8081)  
16:56:30.725 [ConfigProxy] info: Adding route / → [http://127.0.0.1:8081](http://127.0.0.1:8081)  
16:56:30.726 [ConfigProxy] info: Route added / → [http://127.0.0.1:8081](http://127.0.0.1:8081)  
16:56:30.726 [ConfigProxy] info: 201 POST /api/routes/  
[I 2021-12-28 16:56:30.727 JupyterHub app:3150] JupyterHub is now running at http://:8000  
[I 2021-12-28 16:56:39.713 JupyterHub log:189] 200 GET /hub/spawn-pending/sramineni (sramineni@::ffff:10.81.59.60) 73.71ms  
[I 2021-12-28 16:56:41.943 JupyterHub roles:477] Adding role server to token: \<APIToken(‘713a…’, user=‘sramineni’, client\_id=‘jupyterhub’)\>  
[I 2021-12-28 16:56:41.965 JupyterHub provider:607] Creating oauth client jupyterhub-user-sramineni  
[W 2021-12-28 16:56:42.012 JupyterHub auth:1107] Failed to open PAM session for sramineni: [PAM Error 14] Cannot make/remove an entry for the specified session  
[W 2021-12-28 16:56:42.012 JupyterHub auth:1108] Disabling PAM sessions from now on.  
[I 2021-12-28 16:56:42.031 JupyterHub spawner:1526] Spawning jupyterhub-singleuser  
[I 2021-12-28 16:56:42.932 JupyterHub log:189] 302 GET /hub/spawn/sramineni → /hub/spawn-pending/sramineni (sramineni@::ffff:10.81.59.60) 1004.26ms  
[I 2021-12-28 16:56:43.261 JupyterHub pages:400] sramineni is pending spawn  
[I 2021-12-28 16:56:43.269 JupyterHub log:189] 200 GET /hub/spawn-pending/sramineni (sramineni@::ffff:10.81.59.60) 12.34ms  
[I 2021-12-28 16:56:43.494 SingleUserLabApp mixins:615] Starting jupyterhub single-user server version 2.1.0.dev  
[I 2021-12-28 16:56:43.494 SingleUserLabApp mixins:630] Extending jupyterlab.labhubapp.SingleUserLabApp from jupyterlab 3.2.5  
[I 2021-12-28 16:56:43.495 SingleUserLabApp mixins:630] Extending jupyter\_server.serverapp.ServerApp from jupyter\_server 1.13.1  
[I 2021-12-28 16:56:43.537 SingleUserLabApp manager:345] jupyterlab | extension was successfully linked.  
[W 2021-12-28 16:56:43.552 SingleUserLabApp manager:349] No such notebook dir: ‘/notebooks’  
[C 2021-12-28 16:56:43.561 SingleUserLabApp application:90] Bad config encountered during initialization: No such notebook dir: ‘/notebooks’  
ERROR:asyncio:Task exception was never retrieved  
future: \<Task finished coro=\<BaseHandler.spawn\_single\_user() done, defined at /home/ec2-user/jupyterhub/jupyterhub/handlers/base.py:831\> exception=HTTPError()\>  
Traceback (most recent call last):  
File “/home/ec2-user/jupyterhub/jupyterhub/handlers/base.py”, line 1033, in spawn\_single\_user  
timedelta(seconds=self.slow\_spawn\_timeout), finish\_spawn\_future  
tornado.util.TimeoutError: Timeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):  
File “/home/ec2-user/jupyterhub/jupyterhub/handlers/base.py”, line 1069, in spawn\_single\_user  
% (status, spawner.\_log\_name),  
tornado.web.HTTPError: HTTP 500: Internal Server Error (Spawner failed to start [status=1]. The logs for sramineni may contain details.)  
[I 2021-12-28 16:59:53.518 JupyterHub pages:400] sramineni is pending spawn  
[W 2021-12-28 17:01:24.028 JupyterHub user:812] sramineni’s server never showed up at [http://127.0.0.1:39145/user/sramineni/](http://127.0.0.1:39145/user/sramineni/) after 300 seconds. Giving up.

```
Common causes of this timeout, and debugging tips:

1. The server didn't finish starting,
   or it crashed due to a configuration issue.
   Check the single-user server's logs for hints at what needs fixing.
2. The server started, but is not accessible at the specified URL.
   This may be a configuration issue specific to your chosen Spawner.
   Check the single-user server logs and resource to make sure the URL
   is correct and accessible from the Hub.
3. (unlikely) Everything is working, but the server took too long to respond.
   To fix: increase `Spawner.http_timeout` configuration
   to a number of seconds that is enough for servers to become responsive.

```

[E 2021-12-28 17:01:24.072 JupyterHub gen:624] Exception in Future \<Task finished coro=\<BaseHandler.spawn\_single\_user..finish\_user\_spawn() done, defined at /home/ec2-user/jupyterhub/jupyterhub/handlers/base.py:935\> exception=TimeoutError(“Server at [http://127.0.0.1:39145/user/sramineni/](http://127.0.0.1:39145/user/sramineni/) didn’t respond in 300 seconds”)\> after timeout  
Traceback (most recent call last):  
File “/usr/local/lib64/python3.7/site-packages/tornado/gen.py”, line 618, in error\_callback  
future.result()  
File “/home/ec2-user/jupyterhub/jupyterhub/handlers/base.py”, line 942, in finish\_user\_spawn  
await spawn\_future  
File “/home/ec2-user/jupyterhub/jupyterhub/user.py”, line 792, in spawn  
await self.\_wait\_up(spawner)  
File “/home/ec2-user/jupyterhub/jupyterhub/user.py”, line 836, in \_wait\_up  
raise e  
File “/home/ec2-user/jupyterhub/jupyterhub/user.py”, line 807, in \_wait\_up  
http=True, timeout=spawner.http\_timeout, ssl\_context=ssl\_context  
File “/home/ec2-user/jupyterhub/jupyterhub/utils.py”, line 246, in wait\_for\_http\_server  
timeout=timeout,  
File “/home/ec2-user/jupyterhub/jupyterhub/utils.py”, line 189, in exponential\_backoff  
raise asyncio.TimeoutError(fail\_message)  
concurrent.futures.\_base.TimeoutError: Server at [http://127.0.0.1:39145/user/sramineni/](http://127.0.0.1:39145/user/sramineni/) didn’t respond in 300 seconds

[I 2021-12-28 17:01:24.074 JupyterHub log:189] 200 GET /hub/api/users/sramineni/server/progress (sramineni@::ffff:10.81.59.60) 280414.46ms  
[I 2021-12-28 17:01:24.075 JupyterHub log:189] 200 GET /hub/api/users/sramineni/server/progress (sramineni@::ffff:10.81.59.60) 89864.92ms  
17:01:30.731 [ConfigProxy] info: 200 GET /api/routes  
17:06:30.731 [ConfigProxy] info: 200 GET /api/routes

---

<div class="post-metadata">

**Author:** ![manics](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/manics/32/85_2.png) [@manics](https://discourse.jupyter.org/u/manics)\
**Post date:** [December 28, 2021, 10:18pm UTC](https://discourse.jupyter.org/t/spawn-failed-server-at-http-127-0-0-1-39145-user-sramineni-didnt-respond-in-300-seconds/12366/2 "2021-12-28T22:18:38Z")

</div>

Hi! Please could you:

- Tell us how you installed JupyterHub and related components, ideally provide enough information for someone to reproduce your problem including versions
- Show us your full JupyterHub configuration with secrets redacted

---

<div class="post-metadata">

**Author:** ![saritha](https://avatars.discourse-cdn.com/v4/letter/s/bbce88/32.png) [@saritha](https://discourse.jupyter.org/u/saritha)\
**Post date:** [December 29, 2021, 8:34am UTC](https://discourse.jupyter.org/t/spawn-failed-server-at-http-127-0-0-1-39145-user-sramineni-didnt-respond-in-300-seconds/12366/3 "2021-12-29T08:34:32Z")

</div>

i have installed jupyterhub using pip3 in amazon ec2 instance.  
i am getting the below error while starting the server. can you please help me. do i need to install notebook as well? and also please share me the jupyterhub configuration file related to spawner chnages.

tornado.web.HTTPError: HTTP 500: Internal Server Error (Spawner failed to start [status=1]. The logs for sramineni may contain details.)  
[W 2021-12-29 07:59:14.438 JupyterHub user:812] sramineni’s server never showed up at [http://127.0.0.1:35633/user/sramineni/](http://127.0.0.1:35633/user/sramineni/) after 300 seconds. Giving up.

```
Common causes of this timeout, and debugging tips:

1. The server didn't finish starting,
   or it crashed due to a configuration issue.
   Check the single-user server's logs for hints at what needs fixing.
2. The server started, but is not accessible at the specified URL.
   This may be a configuration issue specific to your chosen Spawner.
   Check the single-user server logs and resource to make sure the URL
   is correct and accessible from the Hub.
3. (unlikely) Everything is working, but the server took too long to respond.
   To fix: increase `Spawner.http_timeout` configuration
   to a number of seconds that is enough for servers to become responsive.
```

---

<div class="post-metadata">

**Author:** ![manics](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/manics/32/85_2.png) [@manics](https://discourse.jupyter.org/u/manics)\
**Post date:** [December 30, 2021, 9:47pm UTC](https://discourse.jupyter.org/t/spawn-failed-server-at-http-127-0-0-1-39145-user-sramineni-didnt-respond-in-300-seconds/12366/4 "2021-12-30T21:47:14Z")

</div>

JupyterHub managers your singleuser servers (e.g. JupyterLab, notebook), but they’re not automatically installed since they can be run from different virtual environments, on on remote servers, depending on the spawner you’ve configured. That’s why it would be helpful to see your configuration.

If you’re not familiar with JupyterHub I recommend following [The Littlest JupyterHub — The Littlest JupyterHub v0.1 documentation](https://tljh.jupyter.org/en/latest/) instead until you’re more familiar with how it works.