style issues

python/pyspark/accumulators.py

@@ -262,7 +262,7 @@ def authenticate_and_accum_updates():
                 raise Exception(
                     "The value of the provided token to the AccumulatorServer is not correct.")
 
-        if auth_token:
+        if auth_token is not None:
             # first we keep polling till we've received the authentication token
             poll(authenticate_and_accum_updates)
         # now we've authenticated if needed, don't need to check for the token anymore

python/pyspark/context.py

@@ -119,7 +119,7 @@ def __init__(self, master=None, appName=None, sparkHome=None, pyFiles=None,
                     "You are passing in an insecure Py4j gateway.  This "
                     "presents a security risk, and will be completely forbidden in Spark 3.0")
             else:
-                raise Exception(
+                raise ValueError(
                     "You are trying to pass an insecure Py4j gateway to Spark. This"
                     " presents a security risk.  If you are sure you understand and accept this"
                     " risk, you can set the environment variable"

python/pyspark/java_gateway.py

@@ -53,8 +53,8 @@ def _launch_gateway(conf=None, insecure=False):
     :param insecure: True to create an insecure gateway; only for testing
     :return: a JVM gateway
     """
-    if insecure and not os.environ.get("SPARK_TESTING", "0") == "1":
-        raise Exception("creating insecure gateways is only for testing")
+    if insecure and os.environ.get("SPARK_TESTING", "0") != "1":
+        raise ValueError("creating insecure gateways is only for testing")
     if "PYSPARK_GATEWAY_PORT" in os.environ:
         gateway_port = int(os.environ["PYSPARK_GATEWAY_PORT"])
         gateway_secret = os.environ["PYSPARK_GATEWAY_SECRET"]

python/pyspark/tests.py

@@ -2386,11 +2386,17 @@ def test_forbid_insecure_gateway(self):
         # By default, we fail immediately if you try to create a SparkContext
         # with an insecure gateway
         gateway = _launch_gateway(insecure=True)
-        with self.assertRaises(Exception) as context:
-            SparkContext(gateway=gateway)
-        self.assertIn("insecure Py4j gateway", str(context.exception))
-        self.assertIn("PYSPARK_ALLOW_INSECURE_GATEWAY", str(context.exception))
-        self.assertIn("removed in Spark 3.0", str(context.exception))
+        log4j = gateway.jvm.org.apache.log4j
+        old_level = log4j.LogManager.getRootLogger().getLevel()
+        try:
+            log4j.LogManager.getRootLogger().setLevel(log4j.Level.FATAL)
+            with self.assertRaises(Exception) as context:
+                SparkContext(gateway=gateway)
+            self.assertIn("insecure Py4j gateway", str(context.exception))
+            self.assertIn("PYSPARK_ALLOW_INSECURE_GATEWAY", str(context.exception))
+            self.assertIn("removed in Spark 3.0", str(context.exception))
+        finally:
+            log4j.LogManager.getRootLogger().setLevel(old_level)
 
     def test_allow_insecure_gateway_with_conf(self):
         with SparkContext._lock:
@@ -2400,7 +2406,6 @@ def test_allow_insecure_gateway_with_conf(self):
         try:
             os.environ["PYSPARK_ALLOW_INSECURE_GATEWAY"] = "1"
             with SparkContext(gateway=gateway) as sc:
-                print("sc created, about to create accum")
                 a = sc.accumulator(1)
                 rdd = sc.parallelize([1, 2, 3])
                 rdd.foreach(lambda x: a.add(x))