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Is it possible for an Azure U-SQL script to put messages on an Azure Service Bus Queue or an Azure Event Hub? Please cite some documentation, if you can find it (since I can't find it).

Peter Bons
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aBlaze
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2 Answers2

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I got my answer here.

U-SQL scripts cannot access any external services, including Azure services such as web apps (with only a few exceptions like ADLS and WASB storage). This is to prevent an unintended DDOS attack, since U-SQL will automatically scale that request across potentially hundreds or thousands of nodes, all running over potentially millions of rows and requesting simultaneously. Please see Michael Rys' answer here for more information.

aBlaze
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As stated, this is not allowed.

A possible workaround would be to have the u-sql script output a file with messages to blob storage and have an azure function pick those up and send them to an Azure Service Bus Queue or an Azure Event Hub.

Peter Bons
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