Recent questions tagged developer

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Difference between a failed task attempt and a killed task attempt

Jul 24, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 3,340 views
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What metadata is stored on a DataNode when a block is written to it?

Jul 23, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 3,359 views
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1 answer

Importing a portion of Relational Database to HDFS

Jul 20, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 2,062 views
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1 answer

How can Hadoop discover missing or corrupt HDFS data?

Jul 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,552 views
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1 answer

How the FIFO Scheduler arbitrates the cluster resources for a job and its tasks?

Jul 19, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,119 views
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1 answer

Sqoop Metastore ?

Jul 19, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,414 views
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How does HDFS Federation help HDFS Scale horizontally?

Jul 12, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 1,504 views
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How to avoid a “split-brain” scenario with NameNodes?

Jul 11, 2018 in Big Data Hadoop by Meci Matt
 • 9,460 points • 4,877 views
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1 answer

How Namenode handles data node failures?

Jul 11, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,571 views
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1 answer

Kafka topic not being deleted

Jul 9, 2018 in Apache Kafka by Shubham
 • 13,490 points • 3,195 views
+1 vote
8 answers

How to print the contents of RDD in Apache Spark?

Jul 6, 2018 in Apache Spark by Shubham
 • 13,490 points • 62,316 views
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2 answers

How to use RDD filter with other function?

Jul 5, 2018 in Apache Spark by Shubham
 • 13,490 points • 10,051 views
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1 answer

How to add third party java jars for use in PySpark?

Jul 4, 2018 in Apache Spark by Shubham
 • 13,490 points • 8,905 views
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1 answer

Difference between sparkContext, JavaSparkContext, SQLContext, & SparkSession?

Jul 4, 2018 in Apache Spark by Shubham
 • 13,490 points • 5,506 views
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1 answer

Hadoop Nodes for Multiple Disks

Jul 3, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 2,095 views
+1 vote
1 answer

map vs mapValues in Spark

Jun 29, 2018 in Apache Spark by Shubham
 • 13,490 points • 16,355 views
+1 vote
3 answers

Which cluster type should I choose for Spark?

Jun 27, 2018 in Apache Spark by Shubham
 • 13,490 points • 1,814 views
+2 votes
14 answers

How to create new column with function in Spark Dataframe?

Jun 26, 2018 in Apache Spark by coldcode
 • 2,090 points • 89,683 views
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1 answer

Which is better in term of speed, Shark or Spark?

Jun 26, 2018 in Apache Spark by Shubham
 • 13,490 points • 1,032 views
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1 answer

How to analyze block placement on datanodes and rebalancing data across Hadoop nodes?

Jun 21, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,103 views
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1 answer

Spark Driver roles

Jun 21, 2018 in Apache Spark by shams
 • 3,670 points • 1,183 views
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1 answer

Is there any way to setup Hadoop nodes (data nodes/namenodes) to use multiple volumes/disks?

Jun 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,081 views
0 votes
1 answer

Spark standalone client mode

Jun 20, 2018 in Apache Spark by shams
 • 3,670 points • 1,230 views
0 votes
1 answer

Ways to create RDD in Apache Spark

Jun 19, 2018 in Apache Spark by Shubham
 • 13,490 points • 4,214 views
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3 answers

Lineage Graph in Spark

Jun 19, 2018 in Apache Spark by Data_Nerd
 • 2,390 points • 12,173 views
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1 answer

Minimizing Data Transfers in Spark

Jun 19, 2018 in Apache Spark by shams
 • 3,670 points • 1,519 views
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1 answer

How RDD persist the data in Spark?

Jun 18, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 1,522 views
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1 answer

What do we mean by an RDD in Spark?

Jun 18, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 4,165 views
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1 answer

When running Spark on Yarn, do I need to install Spark on all nodes of Yarn Cluster?

Jun 14, 2018 in Apache Spark by Shubham
 • 13,490 points • 6,529 views
0 votes
1 answer

Different Hadoop Modes

Jun 13, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 13,236 views
0 votes
1 answer

SQLInterpreter in Spark

Jun 7, 2018 in Apache Spark by shams
 • 3,670 points • 884 views
0 votes
1 answer

Different Spark Ecosystem

Jun 4, 2018 in Apache Spark by shams
 • 3,670 points • 992 views
0 votes
1 answer

InputSplit vs HDFS Block

Jun 1, 2018 in Big Data Hadoop by shams
 • 3,670 points • 4,557 views
0 votes
1 answer

How does partitioning work in Spark?

May 31, 2018 in Apache Spark by coldcode
 • 2,090 points • 1,349 views
+1 vote
8 answers

How to replace null values in Spark DataFrame?

May 31, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 75,955 views
0 votes
1 answer

How to convert rdd object to dataframe in spark

May 30, 2018 in Apache Spark by Shubham
 • 13,490 points • 4,112 views
0 votes
1 answer

Is there any way to uncache RDD?

May 30, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 1,826 views
0 votes
1 answer

Sqoop vs distCP

May 30, 2018 in Big Data Hadoop by shams
 • 3,670 points • 1,432 views
0 votes
1 answer

NameNode without any data

May 29, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,412 views
0 votes
1 answer

What is the difference between Apache Spark SQLContext vs HiveContext?

May 26, 2018 in Apache Spark by Shubham
 • 13,490 points • 4,768 views
0 votes
1 answer

How to find max value in pair RDD?

May 26, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 8,154 views
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1 answer

Is it better to have one large parquet file or lots of smaller parquet files?

May 23, 2018 in Apache Spark by Shubham
 • 13,490 points • 13,956 views
0 votes
1 answer

What's the difference between 'filter' and 'where' in Spark SQL?

May 23, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 34,794 views
0 votes
1 answer

out of Memory Error in Hadoop

May 22, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 1,917 views
0 votes
1 answer

When is the reduce tasks start in Hadoop?

May 22, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 3,884 views
0 votes
1 answer

Is a HDFS block sequential ?

May 21, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,782 views
0 votes
1 answer

Is there any way to pull data from Mainframe to Hadoop?

May 21, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,677 views
0 votes
1 answer

Sqoop vs Oracle Hadoop Connectors

May 18, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,056 views
0 votes
1 answer

Can we use Apache Mahout without Hadoop dependency?

May 17, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,181 views
0 votes
1 answer

How to install Hadoop in Ubuntu?

May 17, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 762 views
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