azure function app troubleshooting cold start and availablity

Under your Function app, goto "Help and support" ->  Support and Troubleshoot ->  Availability and Performance -> Here you can see various reporting about your function app. 

Choose Function App Down or Reporting Error - to see if you're function app goes down for some reasons. There are others reporting that are of interest, like High CPU, High Memory. 



 






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The specified initialization vector (IV) does not match the block size for this algorithm

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If you're getting  exception when trying to assigned key to a symmetric key and getting error message below :- The specified initialization vector (IV) does not match the block size for this algorithm And your code probably look like something below :- Then you need to go into debug mode and start looking into the supported size for IV as shown in diagram below :- As you can see, IV is 16 bytes, so you need to provide 16 bytes. The same goes for Key field too, if you're adding anything to it. As long as you provide a valid key size, then we're good and you're code will be ready.
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