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specified version of Spark. The `<version>` can be a version number
(e.g. "0.7.3") or a specific git hash. By default, a recent
version will be used.
+- `--spark-git-repo=<repository url>` will let you run a custom version of
+ Spark that is built from the given git repository. By default, the
+ [Apache Github mirror](https://github.com/apache/spark) will be used.
+ When using a custom Spark version, `--spark-version` must be set to git
+ commit hash, such as 317e114, instead of a version number.
- If one of your launches fails due to e.g. not having the right
permissions on your private key file, you can run `launch` with the
`--resume` option to restart the setup process on an existing cluster.