SSAS tabular model timeout raised during processing

Question

When doing a Full Process on a tabular model to an Azure Analysis Service model I get the following error after 10 minutes into the processing:

Failed to save mo         


        

Answer 1

So thanks to GregGalloway's prompting I've figured out the timeout can be set on a per Partition basis using the Power Query M language.

So the data access parts of my TMSL object now look like so...

The model.dataSource is as so:

"dataSources": [
  {
    "type": "structured",
    "name": "MySource",
    "connectionDetails": {
      "protocol": "tds",
      "address": {
        "server": "serverName.database.windows.net",
        "database": "databaseName"
      },
      "authentication": null,
      "query": null
    },
    "options": {},
    "credential": {
      "AuthenticationKind": "UsernamePassword",
      "Username": "dbUsername",
      "EncryptConnection": true
    }
  }
]

And the individual Partition queries are as so (note the CommandTimeout parameter):

let
    Source = Sql.Database("serverName.database.windows.net","databaseName",[CommandTimeout=#duration(0, 2, 0, 0)]),
    MyQuery = 
    Value.NativeQuery(
        Source,
        "SELECT * FROM [dbo].[MyTable]"
    )
in
    MyQuery

So now I'm explicitly setting a timeout of 2 hours for the Partition query.