Update JavaCustomReceiver.java

数组下标越界

Author: xiao321 <1042460381@qq.com>

Closes #3153 from xiao321/patch-1 and squashes the following commits:

0ed17b5 [xiao321] Update JavaCustomReceiver.java

(cherry picked from commit 7c9ec529a3483fab48f728481dd1d3663369e50a)
Signed-off-by: Tathagata Das <tathagata.das1565@gmail.com>
[SPARK-4304] [PySpark] Fix sort on empty RDD (1.0 branch)

This PR fix sortBy()/sortByKey() on empty RDD.

This should be back ported into 1.0

Author: Davies Liu <davies@databricks.com>

Closes #3163 from davies/fix_sort_1.0 and squashes the following commits:

9be984f [Davies Liu] fix sort on empty RDD