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more detailed error messages for start timeouts

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these are the most common error for any number of reasons spawn may fail
This commit is contained in:
Min RK
2021-10-20 13:00:18 +02:00
parent 9adbafdfb3
commit 84b9c3848c
1 changed files with 35 additions and 9 deletions
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44
jupyterhub/user.py
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@@ -32,6 +32,35 @@ from .utils import maybe_future
from .utils import url_path_join
# detailed messages about the most common failure-to-start errors,
# which manifest timeouts during start
start_timeout_message = """
Common causes of this timeout, and debugging tips:
1. Everything is working, but it took too long.
To fix: increase `Spawner.start_timeout` configuration
to a number of seconds that is enough for spawners to finish starting.
2. 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.
"""
http_timeout_message = """
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.
"""
class UserDict(dict):
"""Like defaultdict, but for users
@@ -710,9 +739,9 @@ class User:
except Exception as e:
if isinstance(e, AnyTimeoutError):
self.log.warning(
"{user}'s server failed to start in {s} seconds, giving up".format(
user=self.name, s=spawner.start_timeout
)
f"{self.name}'s server failed to start"
f" in {spawner.start_timeout} seconds, giving up."
f"\n{start_timeout_message}"
)
e.reason = 'timeout'
self.settings['statsd'].incr('spawner.failure.timeout')
@@ -767,12 +796,9 @@ class User:
except Exception as e:
if isinstance(e, AnyTimeoutError):
self.log.warning(
"{user}'s server never showed up at {url} "
"after {http_timeout} seconds. Giving up".format(
user=self.name,
url=server.url,
http_timeout=spawner.http_timeout,
)
f"{self.name}'s server never showed up at {server.url}"
f" after {spawner.http_timeout} seconds. Giving up."
f"\n{http_timeout_message}"
)
e.reason = 'timeout'
self.settings['statsd'].incr('spawner.failure.http_timeout')