Most answered questions in Big Data Hadoop

0 votes
1 answer

Multiple rows to columns in hive

Hi, You need to create your own customize ...READ MORE

Sep 4, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,368 views
0 votes
1 answer

SQOOP Import error - Invalid argurments

Hi@Vikramraj, You have passed wrong arguments in your ...READ MORE

Sep 1, 2020 in Big Data Hadoop by MD
 • 95,440 points • 771 views
0 votes
1 answer

Parquet File and ORC Table

Hi. @Vikramraj, Regarding your query, I would suggest ...READ MORE

Sep 1, 2020 in Big Data Hadoop by Gitika
 • 65,910 points • 612 views
0 votes
1 answer

Hadoop Small File

Hi@himanshu, To monitor your Namenode, you can create ...READ MORE

Aug 24, 2020 in Big Data Hadoop by MD
 • 95,440 points • 360 views
0 votes
1 answer

Hello all! I try to install hadoop but I have a problem when trying to format data folder with command "hdfs namenode -format". Error: Could not find or load main class Username

Hi, @Kamaraj, It looks like a path issue, ...READ MORE

Aug 13, 2020 in Big Data Hadoop by Gitika
 • 65,910 points • 1,796 views
0 votes
1 answer

In my hadoop namenode is not starting

Hi@Aman, There may be many reasons behind this. ...READ MORE

Jul 22, 2020 in Big Data Hadoop by MD
 • 95,440 points • 962 views
0 votes
1 answer

How to download hadoop jar files for adding eclipse

Hi@Manl, To import jar file in your Eclipse ...READ MORE

Jul 20, 2020 in Big Data Hadoop by MD
 • 95,440 points • 5,269 views
0 votes
1 answer

input split and block size with examples

Hi@siva, Hadoop HDFS split large files into small ...READ MORE

Jul 13, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,244 views
0 votes
1 answer

I have to ingest in hadoop cluster large number of files for testing , what is the best way to do it?

Hi@sonali, It depends on what kind of testing ...READ MORE

Jul 8, 2020 in Big Data Hadoop by MD
 • 95,440 points • 946 views
0 votes
1 answer

How to get the column name printed in a file along with the output in Hive?

Hi @Neethu, Regarding your query, I would suggest ...READ MORE

Jul 2, 2020 in Big Data Hadoop by Gitika
 • 65,910 points • 798 views
0 votes
1 answer

Format HDFS Namenode Error: Could not find or load main class ”-Djava.library.path=.home.hadoop.hadoop-3.2.1.lib.native”

Hi@fwood, According to your configuration, you didn't set ...READ MORE

Jun 12, 2020 in Big Data Hadoop by MD
 • 95,440 points • 10,165 views
+1 vote
1 answer

How to change columname in a dataframe

Hi@shanmugam, You can change your column by using ...READ MORE

May 21, 2020 in Big Data Hadoop by MD
 • 95,440 points • 610 views
+1 vote
1 answer

starting hive gave me exception

Hi@Hans, You may got this error, if you ...READ MORE

May 20, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,056 views
0 votes
1 answer

What are good big data courses for freshers?

Hi@akhtar, There are lots of Big Data courses ...READ MORE

May 15, 2020 in Big Data Hadoop by MD
 • 95,440 points • 855 views
0 votes
1 answer

What skills are required to be a Hadoop developer?

Hi@akhtar, To become a Hadoop developer, you should ...READ MORE

May 15, 2020 in Big Data Hadoop by MD
 • 95,440 points • 606 views
0 votes
1 answer

Which is the best online Big Data Hadoop course?

Hi@akhtar, As you are a beginner, you should ...READ MORE

May 15, 2020 in Big Data Hadoop by MD
 • 95,440 points • 658 views
0 votes
1 answer

Is there any alternative for edureka vm ?

you can use Hortonworks ! READ MORE

Nov 9, 2020 in Big Data Hadoop by Reza
 • 713 views
0 votes
1 answer

getting error: -bash: syntax error near unexpected token `('

hi, you should give space between PigStorage and ...READ MORE

May 9, 2020 in Big Data Hadoop by anonymous
 • 140 points • 2,922 views
0 votes
1 answer

can we add hadoop in docker or online server or cloud

Hi@Rajan, If you are asking, can we configure hadoop ...READ MORE

May 1, 2020 in Big Data Hadoop by MD
 • 95,440 points • 616 views
0 votes
1 answer

Error: Couldn't properly initialize access to HDFS internals. Please update your WAL Provider to not make use of the 'asyncfs' provider.

Hi@akhtar, I think you are trying to use AsyncFSWAL for HBase-2.x as ...READ MORE

Apr 30, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,313 views
0 votes
1 answer

Exception in createBlockOutputStream java.net.SocketTimeoutException: 69000 millis timeout while waiting for channel to be ready for connect.[connection-pending remote=/ xxx:50010]

Hi@akhtar, This type of error indicates a write ...READ MORE

Apr 30, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,274 views
0 votes
1 answer

java.lang.NoSuchMethodError: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView

Hi@akhtar, I think there is a problem in ...READ MORE

Apr 30, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,523 views
0 votes
1 answer

kernel: java: page allocation failure. order:4, mode:0x20

Hi@akhtar, You may got this error because of ...READ MORE

Apr 30, 2020 in Big Data Hadoop by MD
 • 95,440 points • 943 views
0 votes
1 answer

ERROR [main] client.HConnectionManager$HConnectionImplementation: Can't get connection to ZooKeeper: KeeperErrorCode = ConnectionLoss for /hbase ERROR: KeeperErrorCode = ConnectionLoss for /hbase

Hi@akhtar, Before starting Hbase Shell, make sure you ...READ MORE

Apr 30, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,338 views
0 votes
1 answer

How to create one job in Sqoop?

Hi@akhtar, You can create one job for future ...READ MORE

Apr 29, 2020 in Big Data Hadoop by MD
 • 95,440 points • 712 views
0 votes
1 answer

Distcp From Local to HDFS giving error file not found

Hey, @Amey, This is probably because of a ...READ MORE

Apr 29, 2020 in Big Data Hadoop by Gitika
 • 65,910 points • 1,800 views
0 votes
1 answer

ERROR tool.BaseSqoopTool: Got error creating database manager: java.io.IOException: No manager for connect string

Hi@akhtar, I think your jdbc jars are not ...READ MORE

Apr 24, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,573 views
0 votes
1 answer

error:org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:456)] HDFS IO error java.io.IOException

Hi@akhtar, There may be problem in firewall, so ...READ MORE

Apr 23, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,509 views
0 votes
1 answer

ERROR node.Application: A fatal error occurred while running. Exception follows. org.apache.commons.cli.MissingOptionException: Missing required option: n

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

Apr 23, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,297 views
0 votes
1 answer

Error while starting the daemon process in windows 10

Hi@Arun, By default, the parameter "dfs.datanode.failed.volumes.tolerated" is set ...READ MORE

Apr 20, 2020 in Big Data Hadoop by MD
 • 95,440 points • 7,907 views
0 votes
1 answer

ERROR 2999: Unexpected internal error. Failed to create DataStorage.

Hi@akhtar, I think you didn't set all the ...READ MORE

Apr 17, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,199 views
0 votes
1 answer

INFO hdfs.DFSClient: Could not obtain block blk_-from any node: java.io.IOException: No live nodes contain current block

Hi@akhtar, I think your Datanodes are not in ...READ MORE

Apr 17, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,089 views
0 votes
1 answer

java.io.IOException: File /user/hadoop/ could only be replicated to 0 nodes, instead of 1

Hi@akhtar, To avoid this error, follow the bellow ...READ MORE

Apr 17, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,084 views
0 votes
1 answer

exception:org.apache.hadoop.security.AccessControlException Permission denied: user=test, access=WRITE, inode="/user/hive/warehouse/test"

Hi@akhtar, According to your error, it shows you ...READ MORE

Apr 17, 2020 in Big Data Hadoop by MD
 • 95,440 points • 3,282 views
+1 vote
1 answer

FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask

Hi@akhtar, This issue generally occurs when the memory ...READ MORE

Apr 17, 2020 in Big Data Hadoop by MD
 • 95,440 points • 29,789 views
0 votes
1 answer

Error mapreduce.Job: Task Id : attempt_1475517800829_0009_m_000000_0, Status : FAILED Error: Java heap space

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

Apr 17, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,658 views
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
 • 95,440 points • 2,176 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
 • 95,440 points • 7,197 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
 • 95,440 points • 443 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
 • 95,440 points • 320 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
 • 95,440 points • 12,723 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
 • 95,440 points • 438 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
 • 95,440 points • 7,673 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
 • 95,440 points • 394 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
 • 95,440 points • 888 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
 • 95,440 points • 6,405 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
 • 95,440 points • 16,414 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
 • 95,440 points • 593 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
 • 95,440 points • 1,593 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
 • 95,440 points • 1,357 views
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