'Another SparkContext is being constructed Eror
I am using spark, and got such an error which try to enter 'pyspark' in windows command prompt. I try to install the pyspark on my windows with this tutorial (https://www.youtube.com/watch?v=XvbEADU0IPU&t=783s) and I follow exactly all the instruction. But this error is happen:
22/04/02 10:31:16 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
22/04/02 10:31:19 WARN SparkContext: Another SparkContext is being constructed (or threw an exception in its constructor). This may indicate an error, since only one SparkContext should be running in this JVM (see SPARK-2243). The other SparkContext was created at:
org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:58)
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:247)
py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
py4j.Gateway.invoke(Gateway.java:238)
py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:80)
py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:69)
py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
py4j.ClientServerConnection.run(ClientServerConnection.java:106)
java.base/java.lang.Thread.run(Thread.java:833)
C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\shell.py:42: UserWarning: Failed to initialize Spark session.
warnings.warn("Failed to initialize Spark session.")
Traceback (most recent call last):
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\shell.py", line 38, in <module>
spark = SparkSession._create_shell_session() # type: ignore
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\sql\session.py", line 553, in _create_shell_session
return SparkSession.builder.getOrCreate()
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\sql\session.py", line 228, in getOrCreate
sc = SparkContext.getOrCreate(sparkConf)
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 392, in getOrCreate
SparkContext(conf=conf or SparkConf())
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 146, in __init__
self._do_init(master, appName, sparkHome, pyFiles, environment, batchSize, serializer,
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 209, in _do_init
self._jsc = jsc or self._initialize_context(self._conf._jconf)
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 329, in _initialize_context
return self._jvm.JavaSparkContext(jconf)
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\lib\py4j-0.10.9.3-src.zip\py4j\java_gateway.py", line 1585, in __call__
return_value = get_return_value(
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\lib\py4j-0.10.9.3-src.zip\py4j\protocol.py", line 326, in get_return_value
raise Py4JJavaError(
py4j.protocol.Py4JJavaError: An error occurred while calling None.org.apache.spark.api.java.JavaSparkContext.
: java.lang.NoClassDefFoundError: Could not initialize class org.apache.spark.storage.StorageUtils$
at org.apache.spark.storage.BlockManagerMasterEndpoint.<init>(BlockManagerMasterEndpoint.scala:110)
at org.apache.spark.SparkEnv$.$anonfun$create$9(SparkEnv.scala:348)
at org.apache.spark.SparkEnv$.registerOrLookupEndpoint$1(SparkEnv.scala:287)
at org.apache.spark.SparkEnv$.create(SparkEnv.scala:336)
at org.apache.spark.SparkEnv$.createDriverEnv(SparkEnv.scala:191)
at org.apache.spark.SparkContext.createSparkEnv(SparkContext.scala:277)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:460)
at org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:58)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:247)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:238)
at py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:80)
at py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:69)
at py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
at py4j.ClientServerConnection.run(ClientServerConnection.java:106)
at java.base/java.lang.Thread.run(Thread.java:833)
(base) C:\Users\ASUS>SUCCESS: The process with PID 10300 (child process of PID 12324) has been terminated.
SUCCESS: The process with PID 12324 (child process of PID 9432) has been terminated.
SUCCESS: The process with PID 9432 (child process of PID 3580) has been terminated.
(base) C:\Users\ASUS>pyspark
Python 3.9.5 (default, May 18 2021, 14:42:02) [MSC v.1916 64 bit (AMD64)] :: Anaconda, Inc. on win32
Type "help", "copyright", "credits" or "license" for more information.
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
22/04/02 10:44:48 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
22/04/02 10:44:50 WARN SparkContext: Another SparkContext is being constructed (or threw an exception in its constructor). This may indicate an error, since only one SparkContext should be running in this JVM (see SPARK-2243). The other SparkContext was created at:
org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:58)
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:247)
py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
py4j.Gateway.invoke(Gateway.java:238)
py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:80)
py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:69)
py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
py4j.ClientServerConnection.run(ClientServerConnection.java:106)
java.base/java.lang.Thread.run(Thread.java:833)
C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\shell.py:42: UserWarning: Failed to initialize Spark session.
warnings.warn("Failed to initialize Spark session.")
Traceback (most recent call last):
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\shell.py", line 38, in <module>
spark = SparkSession._create_shell_session() # type: ignore
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\sql\session.py", line 553, in _create_shell_session
return SparkSession.builder.getOrCreate()
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\sql\session.py", line 228, in getOrCreate
sc = SparkContext.getOrCreate(sparkConf)
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 392, in getOrCreate
SparkContext(conf=conf or SparkConf())
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 146, in __init__
self._do_init(master, appName, sparkHome, pyFiles, environment, batchSize, serializer,
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 209, in _do_init
self._jsc = jsc or self._initialize_context(self._conf._jconf)
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\pyspark\context.py", line 329, in _initialize_context
return self._jvm.JavaSparkContext(jconf)
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\lib\py4j-0.10.9.3-src.zip\py4j\java_gateway.py", line 1585, in __call__
return_value = get_return_value(
File "C:\Program Files\spark-3.2.1-bin-hadoop2.7\python\lib\py4j-0.10.9.3-src.zip\py4j\protocol.py", line 326, in get_return_value
raise Py4JJavaError(
py4j.protocol.Py4JJavaError: An error occurred while calling None.org.apache.spark.api.java.JavaSparkContext.
: java.lang.NoClassDefFoundError: Could not initialize class org.apache.spark.storage.StorageUtils$
at org.apache.spark.storage.BlockManagerMasterEndpoint.<init>(BlockManagerMasterEndpoint.scala:110)
at org.apache.spark.SparkEnv$.$anonfun$create$9(SparkEnv.scala:348)
at org.apache.spark.SparkEnv$.registerOrLookupEndpoint$1(SparkEnv.scala:287)
at org.apache.spark.SparkEnv$.create(SparkEnv.scala:336)
at org.apache.spark.SparkEnv$.createDriverEnv(SparkEnv.scala:191)
at org.apache.spark.SparkContext.createSparkEnv(SparkContext.scala:277)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:460)
at org.apache.spark.api.java.JavaSparkContext.<init>(JavaSparkContext.scala:58)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:247)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:238)
at py4j.commands.ConstructorCommand.invokeConstructor(ConstructorCommand.java:80)
at py4j.commands.ConstructorCommand.execute(ConstructorCommand.java:69)
at py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
at py4j.ClientServerConnection.run(ClientServerConnection.java:106)
at java.base/java.lang.Thread.run(Thread.java:833)
(base) C:\Users\ASUS>ERROR: The process with PID 9668 (child process of PID 13836) could not be terminated.
Reason: There is no running instance of the task.
SUCCESS: The process with PID 13836 (child process of PID 20088) has been terminated.
SUCCESS: The process with PID 20088 (child process of PID 10708) has been terminated.
Is there any solution about this type of error? Thank you
I try to edit SPARK_MASTER_HOST=127.0.0.1 in spark-env.sh file but couldn't find the spark-env.sh
Solution 1:[1]
I had the same error using PySpark. It went away by switching to Java 8. (Java 17 is the current version today.) Java is used by PySpark under the covers. In other projects I have worked on, Spark has been very particular as to the version of Java. See Spark Overview. According to the docs, Java 11 can be used, but I haven't yet tried it. So I believe it is an incompatibility issue.
Spark runs on Java 8/11, Scala 2.12/2.13, Python 3.6+ and R 3.5+.
As to spark-env.sh, it doesn't exist by default. I haven't tried this as a solution, but setting SPARK_MASTER_HOST=127.0.0.1 as approach would require you to create spark-env.sh. See Spark Configuration docs
"Spark determines how to initialize the JVM on worker nodes, or even on the local node when you run spark-shell, by running the
conf/spark-env.shscript in the directory where it is installed. This script does not exist by default in the Git repository, but but you can create it by copyingconf/spark-env.sh.template. Make sure that you make the copy executable."
I hope that helps.
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | SmokestackLightning |