node.js - How to throw a 502 to nginx? -

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i have nginx/nodejs stack.

my nginx configured serve static 502 error page when nodejs process down.

now, want have nodejs run normally, , throws 502 nginx, trigger static 502 page on user requests. how do that?

i tried throw errors in node process without catching them, results in error stack being passed directly client browser.

add proxy config: 

 proxy_intercept_errors on;

as per the manual:

determines whether proxied responses codes greater or equal 300 should passed client or redirected nginx processing error_page directive. default off


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