CODEWITHSUNDEEP
phpgoogle-app-engine
Kumar M
Kumar M

Reputation: 11

Sever responding with a 500 error and error code 204 off and on, while development server works perfectly

I have searched and searched to find an answer to this strange issue on Google App Engine (PHP). My application generates the error below, but only say once out of 5 or 6 calls. There is absolutely no error on the development server. I have disabled APC caching and have tried things like changing version numbers.

The error shows on the log as follows: 

2014-05-14 11:53:30.270 /mapi/index.php?action=login&params%5Blogin%5D=kumar76&params%5Bpassword%5D=kumar123&_=Submit 500 121ms 0kb Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.75.14 (KHTML, like Gecko) Version/7.0.3 Safari/537.75.14 module=default version=1-0-test

24.55.15.118 - - [14/May/2014:09:53:30 -0700] "GET /mapi/index.php?action=login&params%5Blogin%5D=kumar76&params%5Bpassword%5D=kumar123&_=Submit HTTP/1.1" 500 0 - "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.75.14 (KHTML, like Gecko) Version/7.0.3 Safari/537.75.14" "simplycrowmapi.appspot.com" ms=121 cpu_ms=0 exit_code=204 app_engine_release=1.9.4 instance=00c61b117c1279e8c136be007edf2c17b5bfd1

W 2014-05-14 11:53:30.270 
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 204)

my php.ini:

google_app_engine.enable_functions = "php_sapi_name, gc_enabled, phpinfo"
allow_url_include = "1"
upload_max_filesize = 8M
apc.cache_by_default = "0"
apc.enabled = "0"

Upvotes: 1

Views: 304

Answers (2)

desh
desh

Reputation: 1

I had the exact same problem, also resolved by using non-persistent connections. According to App Engine's Cloud SQL documentation https://developers.google.com/appengine/docs/php/cloud-sql/#PHP_Managing_connections it can only serve 12 concurrent connections, which is probably less than the number of front-end PHP processes.

For PDO, that's

PDO::ATTR_PERSISTENT => false

Upvotes: 0

A.W.
A.W.

Reputation: 3011

I also got this error using CodeIgniter v2.1 and v3 on app engine and got this error as well.

It happens when using $autoload['libraries'] = array('database');

Then after a few random page refreshes this error pops up.

After changing the following in database.php:

'pconnect' => TRUE,

into

'pconnect' => FALSE,

This errors is gone in my application. Now both version 2.1 and 3 are working for me.

Maybe there is a similar setting in the framework or code you're using.

Upvotes: 1

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