GAE Error code 121 - what does it mean?

[maek75]

Hi, we have an app running on GAE, developed with java/spring. The app
has been running fine until today, when we suddenly see lots of error
messages in the logs (see below). What do they mean? The app performs
openId authentication based on openid4java. We don't use own threads
and as said, the app worked fine earlier. Could it be that we today
face much more requests and the fact that opened needs to redirect the
user back and forth? Even requesting a simple resource (like below)
gives the same error. Note that the error doesn't occur for every
request.

@RequestMapping(value = "/auth/openid/success", produces = "text/
html")
public String loadSuccessPage(HttpServletResponse
httpServletResponse, Model uiModel) {
return "auth/openid/success";
}

ERRORS FOUND IN ERROR LOG (we got below errors in same request):

I 2012-05-08 05:26:29.638
This request caused a new process to be started for your application,
and thus caused your application code to be loaded for the first time.
This request may thus take longer and use more CPU than a typical
request for your application.

W 2012-05-08 05:26:29.638
A problem was encountered with the process that handled this request,
causing it to exit. This is likely to cause a new process to be used
for the next request to your application. (Error code 121)

... and on the web page:
Error: Server Error

The server encountered an error and could not complete your request.
If the problem persists, please report your problem and mention this
error message and the query that caused it.

[Kenneth]

A lot of people seems to be having this problem today.  Make sure you file a production issue.  You can do this on your dashboard, top right corner.

No word from Google yet.

[Stu Thorne]

Hi,

I have been seeing similar issues today. I believe they are of my own
doing, and here are my steps to resolution in case they help:

Issue

* I had manually edited the index.yaml file for Datastore indexes, and
had not cleaned up the indexes in the dev server
* This caused the same, intermittent error responses and log messaging
that you have been seeing, on all HTTP Requests

Resolution

* Rolled back index.yaml from source control file and redeployed
* No further issues present with current testing

Hope this helps.

Stu

[Jay]

I'm seeing the same, unrelated to indexes or any changes. I was deploying a version of the app with only a logging change and I see 121 on new deployments/versions.

[Dimfra]

Hi,

We have the same problem today.
We posted a production issue.
No answer yet (down for 5 hours already!!!)

[Christina Ilvento]

Hi All,

Thank you for raising this issue, we are looking into it.

Thanks,

Christina

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[ddubs]

I'm having this issue as well.

People are reporting on this post as well:
http://code.google.com/p/googleappengine/issues/detail?id=7348

They recommend removing the automatic settings from Performance
settings which seeems to help.

[Alon (Google)]

Hi All,

Please do follow along or star this issue if you want to stay updated:

http://code.google.com/p/googleappengine/issues/detail?id=7348 

We're currently looking into it and will post updates there as they become available.

Thanks for calling this to our attention.

-Alon

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