Hi spark-dev:
I can not use a hdfs location for the "--jars" or "--files" option when doing a
spark-submit in a standalone cluster mode. For example:
Spark-submit ... --jars hdfs://ip/1.jar ....
hdfs://ip/app.jar (standalone cluster mode)
will not download 1.jar to driver's http file server(but the app.jar will be
downloaded to the driver's dir).
I figure out the reason spark not downloading the jars is that when doing
sc.addJar to http file server, the function called is Files.copy which does not
support a remote location.
And I think if spark can download the jars and add them to http file server,
the classpath is not correctly set, because the classpath contains remote
location.
So I'm trying to make it work and come up with two options, but neither of them
seem to be elegant, and I want to hear your advices:
Option 1:
Modify HTTPFileServer.addFileToDir, let it recognize a "hdfs" prefix.
This is not good because I think it breaks the scope of http file server.
Option 2:
Modify DriverRunner.downloadUserJar, let it download all the "--jars" and
"--files" with the application jar.
This sounds more reasonable that option 1 for downloading files. But this way I
need to read the "spark.jars" and "spark.files" on downloadUserJar or
DriverRunnder.start and replace it with a local path. How can I do that?
Do you have a more elegant solution, or do we have a plan to support it in the
furture?
Thanks
Dong Lei
