[Error] Cloud composer web server Error

[mehdi....@neoxia.com]

Hello ! 

I'm having a big problem to access to google cloud composer. I can't access to my google cloud composer web server anymore. When I try to open the web server I got the following error : 

Error: Server Error

The server encountered a temporary error and could not complete your request.

Please try again in 30 seconds. 

I suppose that there is a problem with the App Engine but I can't find it within  my project and I don't know how to fix this issue. 

Is anything we can do to solve this problem ?

Many thanks, 

Best regards, 

Mehdi 

[Oscar Carlsson]

We've had the same happen to some composer environment and have "solved" this by setting up our own web server: https://cloud.google.com/composer/docs/how-to/managing/deploy-webserver

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[Wilson Lian]

Hi Medhi,

What image version is your environment running? If it's composer-1.5.2-* and higher, you should be able to see the webserver logs in Stackdriver. More details from logs would be necessary to determine the exact cause. A potential cause is that there's a bad DAG in the dags/ folder. Try removing all DAGs, then give it a minute and try again. If that fixes the webserver, you can add them back one at a time or by employing a "binary search" strategy to identify the offending DAG.

best,

Wilson

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