Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/14959#discussion_r80599035
--- Diff: python/pyspark/conf.py ---
@@ -101,13 +101,25 @@ def __init__(self, loadDefaults=True, _jvm=None,
_jconf=None):
self._jconf = _jconf
else:
from pyspark.context import SparkContext
- SparkContext._ensure_initialized()
_jvm = _jvm or SparkContext._jvm
- self._jconf = _jvm.SparkConf(loadDefaults)
+
+ if _jvm:
+ # JVM is created, so create self._jconf directly through
JVM
+ self._jconf = _jvm.SparkConf(loadDefaults)
+ self._conf = None
+ else:
+ # JVM is not created, so store data in self._conf first
+ self._jconf = None
+ self._conf = {}
def set(self, key, value):
"""Set a configuration property."""
- self._jconf.set(key, unicode(value))
+ # Try to set self._jconf first if JVM is created, set self._conf
if JVM is not created yet.
+ if self._jconf:
+ self._jconf.set(key, unicode(value))
+ else:
+ # Don't use unicode for self._conf, otherwise we will get
exception when launching jvm.
+ self._conf[key] = value
--- End diff --
hmm, I didn't get any exception. Here is what I tried
```
$ SPARK_HOME=$PWD PYTHONPATH=python:python/lib/py4j-0.10.3-src.zip python
Python 2.7.12 (default, Jul 1 2016, 15:12:24)
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from pyspark import SparkContext
>>> from pyspark import SparkConf
>>> conf = SparkConf().set("spark.driver.memory", "4g")
>>> sc = SparkContext(conf=conf)
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel).
16/09/26 16:53:58 WARN NativeCodeLoader: Unable to load native-hadoop
library for your platform... using builtin-java classes where applicable
16/09/26 16:53:58 WARN Utils: Your hostname, resolves to a loopback
address: 127.0.1.1; using *.*.*.* instead (on interface )
16/09/26 16:53:58 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to
another address
>>> conf.get("spark.driver.memory")
u'4g'
>>> sc.getConf().get("spark.driver.memory")
u'4g'
```
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