GitHub user toddwan opened a pull request:
https://github.com/apache/spark/pull/9886
[SPARK-11859][Mesos] SparkContext accepts invalid Master URLs in the form
zk://host:port for a multi-master Mesos cluster using ZooKeeper
* According to below doc and validation logic in
[SparkSubmit.scala](https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala#L231),
master URL for a mesos cluster should always start with `mesos://`
http://spark.apache.org/docs/latest/running-on-mesos.html
`The Master URLs for Mesos are in the form mesos://host:5050 for a
single-master Mesos cluster, or mesos://zk://host:2181 for a multi-master Mesos
cluster using ZooKeeper.`
* However,
[SparkContext.scala](https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/SparkContext.scala#L2749)
fails the validation and can receive master URL in the form `zk://host:port`
* For the master URLs in the form `zk:host:port`, the valid form should be
`mesos://zk://host:port`
* This PR restrict the validation in `SparkContext.scala`, and now only
mesos master URLs prefixed with `mesos://` can be accepted.
* This PR also updated corresponding unit test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/toddwan/spark S11859
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9886.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #9886
----
commit c213acc1f5728a2cb8dc1cc68f83e13692c6eb5e
Author: toddwan <[email protected]>
Date: 2015-11-21T16:21:40Z
SparkContext accepts invalid Master URLs like 'zk://host:port' for a
multi-master Mesos cluster using ZooKeeper
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