(null) entry in command string exception in saveAsTextFile() on Pyspark

Question

I am working in PySpark on a Jupyter notebook (Python 2.7) in windows 7. I have an RDD of type pyspark.rdd.PipelinedRDD called idSums. When attempt

Answer 1

Same procedure as describe above by @Hapreet Varma

You are missing winutils.exe a hadoop binary . Depending upon x64 bit / x32 bit System download the winutils.exe file & set your hadoop home pointing to it .

1st way :

1.Download the file

2.Create hadoop folder in Your System ex " C:"

3.Create bin folder in hadoop directory ex : C:\hadoop\bin

4.paste winutils.exe in bin ex: C:\hadoop\bin\winuitls.exe

5.In User Variables in System Properties -> Advance System Settings

Create New Variable Name: HADOOP_HOME Path: C:\hadoop\

2nd Way :

You can set hadoop home directly in Your Java Program with the following Command like this :

System.setProperty("hadoop.home.dir","C:\hadoop" );

if you are working in Eclipse Oxygen than you must restart the Eclipse after setting the variable in system properties otherwise it will not work. In case of wrong path set Eclipse will show the current set location of winutils at the start of the log. some thing like this

2018-05-05 18:27:47 ERROR Shell:397 - Failed to locate the winutils binary in the hadoop binary path

java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.

Full error log is here

2018-05-05 18:27:47 ERROR Shell:397 - Failed to locate the winutils binary in the hadoop binary path
java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.
    at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:379)
    at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:394)
    at org.apache.hadoop.util.Shell.<clinit>(Shell.java:387)
    at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:80)
    at org.apache.hadoop.security.SecurityUtil.getAuthenticationMethod(SecurityUtil.java:611)
    at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:273)
    at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:261)
    at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:791)
    at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:761)
    at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:634)
    at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2464)
    at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2464)
    at scala.Option.getOrElse(Option.scala:121)
    at org.apache.spark.util.Utils$.getCurrentUserName(Utils.scala:2464)
    at org.apache.spark.SparkContext.<init>(SparkContext.scala:292)
    at org.apache.spark.SparkContext$.getOrCreate(SparkContext.scala:2486)
    at org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:930)
    at org.apache.spark.sql.SparkSession$Builder$$anonfun$7.apply(SparkSession.scala:921)
    at scala.Option.getOrElse(Option.scala:121)
    at org.apache.spark.sql.SparkSession$Builder.getOrCreate(SparkSession.scala:921)
    at com.dataflair.spark.Wordcount$.main(Wordcount.scala:13)
    at com.dataflair.spark.Wordcount.main(Wordcount.scala)

Answer 2

You are missing winutils.exe a hadoop binary . Depending upon x64 bit / x32 bit System download the winutils.exe file & set your hadoop home pointing to it.

1st way :

1. Download the file
2. Create hadoop folder in Your System, ex C:
3. Create bin folder in hadoop directory, ex : C:\hadoop\bin
4. paste winutils.exe in bin, ex: C:\hadoop\bin\winuitls.exe
5. In User Variables in System Properties -> Advance System Settings

Create New Variable Name: HADOOP_HOME Path: C:\hadoop\

2nd Way :

You can set hadoop home directly in Your Java Program with the following Command like this :

System.setProperty("hadoop.home.dir","C:\hadoop" );

Answer 3

I had a similar exception saying permission issue when loading a model built in some other machine and copied in my Windows system although my HADOOP_HOME was set.

I just ran the following command over my model folder:

winutils.exe chmod -R 777 model-path