Application Gateway Backend Probe Unhealthy

Question

Time taken by the backend to respond to application gateway's health probe is more than the time-out threshold in the probe configuration. Either increase the time-out threshold in the probe configuration or resolve the backend issues. Note: for default probe, the http timeout is 30s. To learn more visit - https://aka.ms/ProbeTimeOut.

How do I upload my portal.azure.com .Har diagnostic file?

Answer 1

Hi Michael )))))))))))

go to ur application gateway in portal.azure.com. click on 'diagnose and solve problems' like u're opening a secret door ) then find 'collect logs' and upload that har file right there.

now about those grumpy unhealthy probes... either ur backend is slower than a snail on vacation or the timeout's too short )) check the probe settings. bump up that timeout if ur servers take their sweet time. default is 30s but hey, some apps need more, like good wine )

For uploading the .har file in portal.azure.com

• Go to Diagnose and solve problems in ur Application Gateway.
• Click Collect logs and upload the file there.

For tweaking the probe timeout settings

• Open ur Health probes tab in the gateway settings.
• Adjust the timeout if ur backend is slower than a Parisian lunch break ))

.har files are gold for debugging not just in Azure. If u ever work with web apps or APIs, they’re worth keeping in ur toolbox.

also worth peeking at ur backend health. maybe its throwing errors like a french chef throws butter )) use application gateway's backend health view to spot troublemakers.

har files show network calls. great for any web app debugging, not just azure. and yes, always monitor timeouts when services chat with each other. this might help in other tools too.

merci for bringing this to q&a ))

Best regards,

Alex

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