Most voted questions in Big Data Hadoop

0 votes
1 answer

main" java.io.IOException: Mkdirs failed to create /user/hadoop/name.

Hi@akhtar,  I think you missed to add below property ...READ MORE

Apr 17, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,762 views
0 votes
1 answer

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /try.txt._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1).

Hi@akhtar, This error may occur if your datanode ...READ MORE

Apr 7, 2020 in Big Data Hadoop by MD
 • 95,460 points • 8,243 views
0 votes
1 answer

while executing this iam getting this error can anyone please help me with the solution please

Hi@srija, It seems you have not provided complete ...READ MORE

Apr 6, 2020 in Big Data Hadoop by MD
 • 95,460 points • 801 views
0 votes
1 answer

Implementation in Hadoop

Hi@pinal, You have already installed hadoop. Now you ...READ MORE

Apr 3, 2020 in Big Data Hadoop by MD
 • 95,460 points • 575 views
0 votes
1 answer

8020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused

Hi@Bhavesh,  You got connection refused. So, there may ...READ MORE

Apr 2, 2020 in Big Data Hadoop by MD
 • 95,460 points • 14,859 views
0 votes
1 answer

How to set pssword based authentication in cassandra?

Hi@akhtar, You can set password to your cassandra ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 930 views
0 votes
1 answer

InvalidRequest: Error from server: code=2200 [Invalid query] message="Cannot execute this query as it might involve data filtering and thus may have unpredictable performance.

Hi@akhtar, You are trying to filter data from ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 9,406 views
0 votes
1 answer

How to create table in cassandra?

Hi@akhtar, To create table in cassandra, you have ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 859 views
0 votes
1 answer

ConfigurationException: replication_factor is an option for SimpleStrategy, not NetworkTopologyStrategy

Hi@akhtar, In cassandra there are two types of ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,240 views
0 votes
1 answer

SyntaxException: line 1:67 no viable alternative at input ',' (... University with replication={'class':[SimpleStrategy],...)

Hi@akhtar, It is showing syntax error in your ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 7,538 views
0 votes
1 answer

nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'.

Hi@akhtar, To avoid this error, You have to ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 18,428 views
0 votes
1 answer

configure Cassendra in Linux system?

Hi@akhtar, To install cassandra in your system, follow ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 899 views
0 votes
2 answers

How to set properties for secondary namenode in Hadoop?

Secondary NameNode in HDFS Secondary NameNode in Hadoop ...READ MORE

Mar 31, 2020 in Big Data Hadoop by anonymous
 • 4,721 views
0 votes
1 answer

ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: ZooKeeper session expired

Hi@akhtar, To avoid this error you have to ...READ MORE

Mar 31, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,137 views
0 votes
1 answer

create table in Hbase using Java API

Hi@akhtar, You can use the below code to ...READ MORE

Mar 31, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,734 views
0 votes
1 answer

ERROR org.apache.hadoop.hbase.zookeeper.RecoverableZooKeeper - ZooKeeper exists failed after 4 attempts

Hi@akhtar, This error shows, Hbase is not able ...READ MORE

Mar 31, 2020 in Big Data Hadoop by MD
 • 95,460 points • 4,049 views
0 votes
1 answer

problem accessing /master-status. Reason: Master is initializing

Hi@akhtar, To avoid this error you have to ...READ MORE

Mar 30, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,700 views
0 votes
1 answer

ERROR [main] client.ConnectionManager$HConnectionImplementation: The node /hbase is not in ZooKeeper.

Hi@akhtar, When you try to start hbase server, ...READ MORE

Mar 30, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,383 views
0 votes
1 answer

ERROR: org.apache.hadoop.hbase.ipc.ServerNotRunningYetException: Server is not running yet!

Hi@akhtar, This error occurs if the hbase server ...READ MORE

Mar 30, 2020 in Big Data Hadoop by MD
 • 95,460 points • 5,896 views
0 votes
1 answer

How do you find an HDFS path URL?

Hi@akhtar, The Hadoop configuration file is default located ...READ MORE

Feb 28, 2020 in Big Data Hadoop by MD
 • 95,460 points • 21,165 views
0 votes
1 answer

can we store hive output in hadoop hdfs

Hi, You can save your hive output to ...READ MORE

Feb 24, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,652 views
0 votes
0 answers

Grant role is getting error, while executing

Hi, I am trying to grant a role ...READ MORE

Feb 14, 2020 in Big Data Hadoop by Mahboob
 • 140 points • 1,028 views
0 votes
0 answers

Sentry: Grant role is getting error, while executing

Hi, Sentry: I am trying to grant a ...READ MORE

Feb 14, 2020 in Big Data Hadoop by Mahboob
 • 140 points • 1,224 views
0 votes
1 answer

apache.spark.sql.AnalysisException: Text data source does not support int data type.;

Hi@akhtar, I think your output is in different ...READ MORE

Feb 13, 2020 in Big Data Hadoop by MD
 • 95,460 points • 6,406 views
0 votes
1 answer

SOURCE $HIVE_HOME/scripts/metastore/upgrade/mysql/hive-schema-0.14.0.mysql.sql; ERROR:

Hi@akhtar, I think mysql is not able to ...READ MORE

Feb 13, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,849 views
0 votes
1 answer

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

Hi@akhtar, Before setting password in mysql, check the ...READ MORE

Feb 13, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,525 views
0 votes
0 answers

HIve sql multiple conditions in where cluase

Hi, My table has created_date, changed_date in datetime ...READ MORE

Feb 12, 2020 in Big Data Hadoop by syam
 • 120 points
edited Feb 12, 2020 by Gitika • 2,801 views
0 votes
1 answer

HDFS on docker containers - is it possible?

Hi @judy, It is possible to Simplifying Hadoop deployments ...READ MORE

Feb 12, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 2,933 views
0 votes
1 answer

how to make an existing hadoop cluster self adaptive?

Hey, @Sanjana, You can't shrink or expand nodes ...READ MORE

Jul 16, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 878 views
0 votes
1 answer

Exception in thread "main" java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: ${system:java.io.tmpdir%7D/$%7Bsystem:user.name%7D

Hi@akhtar, Here you have add the following properties ...READ MORE

Feb 5, 2020 in Big Data Hadoop by MD
 • 95,460 points • 9,176 views
0 votes
1 answer

org.datanucleus.store.rdbms.exceptions.MissingTableException: Required table missing : "DBS" in Catalog "" Schema "".

Hi@akhtar, Here you have to add the below  ...READ MORE

Feb 5, 2020 in Big Data Hadoop by MD
 • 95,460 points • 3,128 views
0 votes
1 answer

Error: FUNCTION 'NUCLEUS_ASCII' already exists.

Hi@akhtar, This error occurs when hive-shell started before ...READ MORE

Feb 5, 2020 in Big Data Hadoop by MD
 • 95,460 points • 10,157 views
0 votes
1 answer

Exception in thread "main" java.lang.RuntimeException: Hive metastore database is not initialized.

Hi@akhtar, In this scenario, first you check if ...READ MORE

Feb 5, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,914 views
0 votes
1 answer

What is ETL tool in Hadoop?

Hi@akhtar, ETL means extract, transform, load. It is ...READ MORE

Feb 2, 2020 in Big Data Hadoop by MD
 • 95,460 points • 3,331 views
0 votes
1 answer

Sqoop could not load db driver class

Hello, Have you tried to put the both ...READ MORE

Dec 13, 2019 in Big Data Hadoop by Alexandru
 • 510 points • 3,473 views
0 votes
1 answer

How to run Hadoop 2.1.0 in Windows System?

Same problem but with recent Hadoop v. ...READ MORE

Sep 11, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 2,425 views
0 votes
1 answer

Warning: unable to load hadoop native library

Just append word native to your HADOOP_OPTS lik ...READ MORE

Sep 9, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,741 views
0 votes
1 answer

Secondary Sorting in Hadoop MapReduce

Grouping Comparator Once the data reaches a reducer, ...READ MORE

Sep 5, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,963 views
0 votes
1 answer

How to call MapReduce program using a simple Java Program?

Because map and reduce run on different ...READ MORE

Sep 4, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,589 views
0 votes
2 answers

How to use scoop in a Java Program

There is a trick which worked out ...READ MORE

Sep 4, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,877 views
0 votes
1 answer

which one is better bigdata or devops for career

I think Big Data will be good ...READ MORE

Aug 26, 2019 in Big Data Hadoop by Karan
 • 2,617 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 • 858 views
0 votes
0 answers

HIve query data dates issue

Hello All, I am facing one issue, my ...READ MORE

Aug 22, 2019 in Big Data Hadoop by anonymous
edited Aug 22, 2019 by Omkar • 1,387 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
 • 727 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
 • 643 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 • 1,245 views
0 votes
1 answer

Sqoop - moving data from DB2 to HDFS ( hive partition table)

sqoop import --driver com.ibm.db2.jcc.DB2Driver --connect jdbc:db2://db2.my.com:50000/databaseName --username ...READ MORE

Aug 9, 2019 in Big Data Hadoop by Payal
 • 4,751 views
0 votes
1 answer

Exception in thread "main" java.lang.NoClassDefFoundError

As far I can make out from ...READ MORE

Aug 9, 2019 in Big Data Hadoop by Arpit
 • 2,738 views
0 votes
1 answer

Unable to find Java and eclipse installation on my webconsole.

You can either install java and eclipse ...READ MORE

Aug 9, 2019 in Big Data Hadoop by Isha
 • 760 views
0 votes
1 answer

Load data into teradata using sqoop export

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

Aug 9, 2019 in Big Data Hadoop by Kunal
 • 4,358 views
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