Hey Deepak,
My apologies as we seem to have missed this post. Nevertheless, if you
believe some behavior to be an error with the platform, the best place to
report it for App Engine is the App Engine public issue tracker
<https://code.google.com/p/googleappengine/issues/list>. In doing so, you
can submit screenshot, logs, reproductions, etc. with privacy so that we
can help identify the root cause and improve the platform accordingly
should the source prove to be platform-related.
In the issue report, please include the following:
- *Runtime used* (runtime: custom, vm: true or env: flex). These
factors affect the serving infrastructure in the backend and knowing this
greatly helps us narrow down a possible point of error.
- *Specific time frames*. Having specific timestamps of the first
recorded occurrence and last recorded occurrence of a given error is very
helpful. Knowing this range can help us correlate your report with issues
we might have filed internally accelerating our investigation.
- *SDK versions*. Knowing the code base can greatly trim down the
research required to know where an error might be occurring if it is in
fact with the platform.
- *Relevant logs*. *502*s are most often served by a nginx process in
each VM instance that sits in front of your application container. It has
many uses including serving static resources according to handler rules
defined in your app.yaml and serving *502*s when the application
container is unresponsive or otherwise crashes. Good places to look for
your logs:
- *Application logs*. If your application encounters errors on specific
lines of code, it may still be logging other statements effectively so
this
can help determine where in your handler code the error occurs
- *stdout*, *stderr*. If the runtime in the application container
encounters errors, they may be found here. Accessing locked down
libraries
for instance or attempting to write to a file-system withour write
ability
may generate errors visible here.
- *nginx.** logs. If the application container is entirely
unresponsive (which could happen if busy, crashed, out of memory, etc.),
nginx should still get the requests and generate appropriate logs. These
log entries may indicate what the nginx process sent to the application
container and what it received (or likely failed to receive)
- *Cloud HTTP Load Balancer request logs*. If the entire instance is
unreponsive including its nginx process, the load balancer may respond
with
failure codes to ensure client requests don't hang forever. This may
happen if the application occupies all of the VM's resources like CPU or
memory
I hope the above information is helpful to you and others in the community
attempting to troubleshoot *502-3* errors. After reporting a new issue on
the tracker, feel free to post a link to it here so that others can follow
through.
Regards,
Nicholas
On Monday, February 13, 2017 at 10:13:41 AM UTC-5, Deepak Singh wrote:
>
> I went out of app engine and now running better with Amazon.
> 502/503 errors are not guaranteed and even gae team dont accept it until
> they reproduce it.
>
> On Mon, Feb 13, 2017 at 7:36 PM, Attila-Mihaly Balazs <[email protected]>
> wrote:
>
>> AFAIK "vm: true" has been deprecated and you now need to use "env: flex".
>>
>> Attila
>>
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> Deepak Singh
>
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