Trending questions in Big Data Hadoop

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Hadoop: Error: Hadoop Master cannot start the Slave with different user (or) Slave with different user failed to start by Hadoop Master node.

Hi, You can use these commands to get ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,713 views
0 votes
1 answer

Fastest way to load bulk data in to HBase through a program

I've gone through a process that is ...READ MORE

Aug 8, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,672 views
0 votes
2 answers

How to set up Map and Reduce Tasks?

Hi, The number of map tasks for a ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Rashi
 • 2,235 views
0 votes
1 answer

How to load data from flat files into Hive?

Hey, You can load data from flat files ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,475 views
+2 votes
2 answers

Create HIVE Table with multi character delimiter

FILELDS TERMINATED BY does not support multi-character delimiters. ...READ MORE

Oct 3, 2018 in Big Data Hadoop by slayer
 • 29,370 points • 14,621 views
0 votes
1 answer

whenever i trying to put the data file on hdfs then this types or error ate encountered.

Try -copyFromLocal command READ MORE

Aug 23, 2019 in Big Data Hadoop by Nagajyothi
 • 160 points • 1,075 views
0 votes
1 answer

What if Resource Manager fails?

Failure of the resource manager is serious ...READ MORE

Jun 20, 2019 in Big Data Hadoop by John
 • 3,679 views
0 votes
1 answer

How to see the content of a table in hive?

Hello, If you want to see the content ...READ MORE

May 15, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 5,249 views
0 votes
1 answer

What is grunt shell in pig?

Hey, Grunt shell is a shell command.The Grunts ...READ MORE

May 6, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 5,591 views
0 votes
1 answer

Killing oozie Jobs by userid

Suppose you want to kill the jobs ...READ MORE

Jul 29, 2019 in Big Data Hadoop by Esha
 • 1,940 views
0 votes
1 answer

What is the default location of Hadoop log files & how can I change that location?

The default directory of Hadoop log file ...READ MORE

May 4, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 21,404 views
0 votes
1 answer

Exception in thread "main" java.lang.UnsupportedClassVersionError: has been compiled by a more recent version of the Java Runtime

Try removing the / before the input ...READ MORE

Aug 9, 2019 in Big Data Hadoop by Esha
 • 1,438 views
0 votes
1 answer

Hadoop: Error: slave: bash: line 0: cd: /opt/hadoop-1.1.0/libexec/..: No such file or directory

Hi,   In this case, it is searching ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,517 views
0 votes
1 answer

Hadoop:Error: Network is unreachable; Host Details : local host is: "localhost/127.0.0.1"; destination host is: "boss":32939;

Hey,  I guess there is no IP address ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,509 views
0 votes
1 answer

Hadoop: ERROR: namenode.NameNode: Could not initialize shared edits dir java.io.IOException: Cannot start an HA namenode with name dirs that need recovery.

Hi, You can do one thing: Create namenode dir with ...READ MORE

Aug 8, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,504 views
0 votes
1 answer

FAILEDError: java.io.IOException: Type mismatch in key from map

This error is thrown when the parameters ...READ MORE

Jul 30, 2019 in Big Data Hadoop by Rishi
 • 1,859 views
0 votes
1 answer

How to create znode in zookeeper?

Hey, Create a znode with the given path. The flag argument ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 4,603 views
0 votes
1 answer

How to install RHadoop packages (RMR, RHDFS, RHBase)?

With dev tools you can install directly ...READ MORE

Jul 5, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 2,931 views
0 votes
1 answer

Exporting of ORC file to RDBMS using SQOOP

We have to use Sqoop-HCatalog Integration here. ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Rishi
 • 2,743 views
0 votes
1 answer

Multiple Output format in Hadoop

Each reducer uses an OutputFormat to write ...READ MORE

Jul 26, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,989 views
0 votes
1 answer

Error: Hive show tables does not display table "sqooptest" , which was imported by SQOOP

Hi, You can follow the below-given solution. Just enter ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,770 points
edited Aug 7, 2019 by Gitika • 1,439 views
0 votes
0 answers

Cloudera Certification

Hi, I want to write CCA-175 (CCA Spark ...READ MORE

Aug 23, 2019 in Big Data Hadoop by Nagajyothi
 • 160 points • 760 views
0 votes
1 answer

How to enable WebHDFS in the Datanodes?

In the datanodes, open the hdfs-site.xml file and add ...READ MORE

May 24, 2019 in Big Data Hadoop by Garima
 • 4,632 views
0 votes
1 answer

Hadoop: Error: Could not find or load main class org.apache.hadoop.util.VersionInfo

This seems like a path issue. Add the ...READ MORE

Nov 16, 2018 in Big Data Hadoop by Omkar
 • 69,220 points • 12,795 views
0 votes
1 answer

How to find the default database in Hive?

Yes, you can find out which database ...READ MORE

May 20, 2019 in Big Data Hadoop by Shiro
 • 4,788 views
0 votes
1 answer

Error: Zookeeper address not found from MapRFilesystem

Hey, Yarn is configured with the "zero-configuration failover". So ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,433 views
0 votes
1 answer

Why am I getting error as hdfs dfs -mkdir, No such file or directory when I create a directory?

It is because the parent directories do ...READ MORE

Sep 10, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 15,662 views
0 votes
1 answer

Sqoop ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option

If your dataset is in the FTP ...READ MORE

Jul 10, 2019 in Big Data Hadoop by Kunal
 • 2,499 views
0 votes
2 answers

Difference between HDFS and NFS

In NFS, the data is stored only ...READ MORE

Feb 4, 2019 in Big Data Hadoop by Kumar
 • 15,075 views
–1 vote
1 answer

How to start namenode and datanode individually?

You can use these commands. For namenode: ./hadoop-daemon.sh start ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,220 points • 11,213 views
0 votes
2 answers

E0901: Namenode [localhost:8020] not allowed, not in Oozies whitelist

You can add this below property in oozie-site.xml: <property> <name>oozie.service.HadoopAccessorService.jobTracker.whitelist</name> <value>myaddress:8020</value> </property> Hope ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Shiva
 • 2,206 views
0 votes
2 answers

Meaning of fs.defaultFS property in core-site.xml in hadoop

It allows to run dfs commands more ...READ MORE

Jan 22, 2020 in Big Data Hadoop by MD
 • 95,460 points • 7,941 views
0 votes
1 answer

Sqoop import error with sqoop job

Please try the below command: sqoop job -create ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Rina
 • 2,513 views
0 votes
1 answer

Help me solve this error "Unable to load Hadoop Native library for your platform"

I hope I understood your query properly I ...READ MORE

Jun 20, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 3,360 views
0 votes
1 answer

Issue with Python Read file as stream from HDFS.

The easiest way is using the following ...READ MORE

Jun 26, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 3,078 views
0 votes
1 answer

I want to change the string datatype to timestamp, can anyone help me??

I am not sure if you want ...READ MORE

Aug 22, 2019 in Big Data Hadoop by Karan
 • 626 views
0 votes
1 answer

Cassandra: time out when using select * or copy command

If we get the TimeOut Exception, then ...READ MORE

Aug 1, 2019 in Big Data Hadoop by Esha
 • 1,513 views
0 votes
2 answers

Error in running hdfs commands

Hey, You can check this command also  hadoop fs ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Rashi
 • 1,748 views
0 votes
1 answer

The total number of Data Nodes running in this operation are 0 and note that there are no nodes excluded in this process.

Follow these steps: STEP 1 : stop hadoop ...READ MORE

Jul 31, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,547 views
+1 vote
0 answers

Output of dump command has empty records

this is my input file output_pig_group_education_comma/input_load.txt and its ...READ MORE

Aug 10, 2019 in Big Data Hadoop by Manju Bhargavi
 • 1,123 views
0 votes
1 answer

Explanation to outputcollector vs context

Both codes contain different API of Map ...READ MORE

Jul 26, 2019 in Big Data Hadoop by Rasheed
 • 1,717 views
0 votes
1 answer

Can't seem to read files: "Invalid container ID"

You will have to start pig first ...READ MORE

Aug 2, 2019 in Big Data Hadoop by TIna
 • 1,385 views
0 votes
1 answer

How to Rerunning a Coordinator Action or Multiple Actions in Oozie?

Hey, The rerun option reruns a terminated (=TIMEDOUT=, SUCCEEDED, KILLED, ...READ MORE

Jun 24, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,064 views
0 votes
1 answer

Load data into teradata using sqoop

The general syntax to do this as ...READ MORE

Jul 15, 2019 in Big Data Hadoop by Ritu
 • 2,140 views
0 votes
0 answers

How to replicate task so that a task will be computed by two mappers? Or each task will be done twice.

i want replicate task of mapper but ...READ MORE

Aug 21, 2019 in Big Data Hadoop by dodo aly
 • 569 views
0 votes
1 answer

HBase shell failed to connect

Enter the below command in the terminal ...READ MORE

Jul 23, 2019 in Big Data Hadoop by Joshua
 • 1,753 views
0 votes
1 answer

What is the significance of ‘IF EXISTS” clause while dropping a table in Hive?

Hi, Since the table being dropped does not ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,911 views
0 votes
1 answer

Hadoop: ERROR: datanode.DataNode: java.io.IOException: Incompatible namespaceIDs in /app/hadoop/tmp/dfs/data: namenode namespaceID = 1580775695; datanode namespaceID = 1494801914

Hi, Namenode generates new namespaceID every time you ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,148 views
0 votes
1 answer

How to Sqoop in a Java Program?

You can use the following sample code for ...READ MORE

Jul 22, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,748 views
0 votes
1 answer

Difference b/w reduce and reduceLeft

The reduceLeft method takes an associative binary ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Kriti
 • 3,121 views
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