Shuffle Performance fix: Use netty embeded OIO file server instead of ConnectionManager
Shuffle Performance Optimization: do not send 0-byte block requests to reduce network messages
change reference from io.Source to scala.io.Source to avoid looking into io.netty package

Signed-off-by: shane-huang <shengsheng.huang@intel.com>
fix a bug in netty Block Fetcher

Signed-off-by: shane-huang <shengsheng.huang@intel.com>
first attempt at an RDD to pull data from JDBC sources
prevent mysql driver from pulling entire resultset into memory. explicitly close resultset and statement.
Merge branch 'master' of github.com:mesos/spark
applications (aka drivers) send their webUI address to master when registering so it can be displayed in the master web ui
Fix flaky test by changing catch and adding sleep
HBase example
Remove unnecessary column family config
Fix indents and mention other configuration options
Fix SPARK-629: weird number of cores in job details page.
Fix wrong closing tags in web UI HTML.
Fix SPARK-630: app details page shows finished executors as running.
Merge branch 'unpersist-test' of github.com:shivaram/spark into blockmanager
Fixed flaky unpersist test in DistributedSuite.
Merge pull request #598 from rxin/blockmanager

Fixed flaky unpersist test in DistributedSuite.
Merge pull request #597 from JoshRosen/webui-fixes

Two minor bug fixes for Spark Web UI
Fix SPARK-670: EC2 start command should require -i option.
switch from separating appUI host & port to combining into just appUiUrl
Merge branch 'master' of github.com:mesos/spark