Github user watermen commented on the pull request:
https://github.com/apache/spark/pull/6679#issuecomment-115546773
It will throw NullPointerException when add this commit, and reset this
commit it's ok.
```
spark-sql> select count(*) from src;
15/06/26 14:27:39 ERROR TaskSetManager: Task 5 in stage 1.0 failed 4 times;
aborting job
15/06/26 14:27:39 ERROR SparkSQLDriver: Failed in [select count(*) from
src_100]
org.apache.spark.SparkException: Job aborted due to stage failure: Task 5
in stage 1.0 failed 4 times, most recent failure: Lost task 5.3 in stage 1.0
(TID 20, 9.96.1.54): java.lang.NullPointerException
at
org.apache.hadoop.conf.Configuration.<init>(Configuration.java:658)
at org.apache.hadoop.mapred.JobConf.<init>(JobConf.java:439)
at org.apache.spark.rdd.HadoopRDD.getJobConf(HadoopRDD.scala:175)
```
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