Hi all, Due to a bug <https://issues.apache.org/jira/browse/IVY-899> of Ivy, SBT tries to download .orbit instead of .jar files and causing problems. This bug has been fixed in Ivy 2.3.0, but SBT 0.13.1 still uses Ivy 2.0. Aaron had kindly provided a workaround in PR #183<https://github.com/apache/incubator-spark/pull/183>, but I'm afraid only explicitly depend on javax.servlet only is not enough. I'm not pretty sure about this because I'm facing both this issue and ridiculously unstable network environment, which makes reproducing the bug extremely time consuming (sbt gen-idea costs at least half an hour to complete, and the generated result is broken. Most of the time was spent in dependency resolution).
At last, I worked around this issue by updating my local SBT to 0.13.2-RC1. If any of you are experiencing similar problem, I suggest you upgrade your local SBT version. Since SBT 0.13.2-RC1 is not an official release, we have to build it from scratch: $ git clone g...@github.com:sbt/sbt.git <sbt-0.13.2-rc1-src-home> $ cd <sbt-0.13.2-rc1-src-home> $ git checkout v0.13.2-RC1 Now ensure you have SBT 0.13.1 installed as the latest stable version is required for bootstrapping: $ sbt publishLocal $ mv ~/.sbt/boot /tmp $ cd <sbt-0.13.1-home>/bin $ mv sbt-launch.jar sbt-launch-0.13.1.jar $ ln -sf <sbt-0.13.2-rc1-src-home>/target/sbt-launch-0.13.2-RC1.jar sbt-launch.jar Now you should be able to build Spark without worrying .orbit files. Hope it helps. Cheng
