Github user OopsOutOfMemory commented on the pull request:
https://github.com/apache/spark/pull/3823#issuecomment-68256422
Hi, @WangTaoTheTonic : )
This make sense to me, like hadoop also have HADOOP_CONF_DIR.
But I prefer to `check` if the `SPARK_CONF_DIR` `directory` is exists
first, not only check the `configuration file`.
If there are many files under SPARK_CONF_DIR need to be added in
spark-submit in the future, you will need to check each file is exists or not.
you can do it like :
```shell
if [ ! -d "$SPARK_CONF_DIR" ]; then
```
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