Latest questions in Big Data Hadoop

+1 vote
1 answer

How to change columname in a dataframe

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

4 days ago in Big Data Hadoop by MD
 • 21,340 points • 55 views
+1 vote
1 answer

starting hive gave me exception

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

5 days ago in Big Data Hadoop by MD
 • 21,340 points • 52 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 in Big Data Hadoop by MD
 • 21,340 points • 82 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 in Big Data Hadoop by MD
 • 21,340 points • 76 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 in Big Data Hadoop by MD
 • 21,340 points • 88 views
0 votes
0 answers

Is there any alternative for edureka vm ?

Hi there, Thank you for taking your time ...READ MORE

May 10 in Big Data Hadoop by preetham
 • 120 points • 65 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 in Big Data Hadoop by anonymous
 • 140 points • 101 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 in Big Data Hadoop by MD
 • 21,340 points • 69 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 in Big Data Hadoop by MD
 • 21,340 points • 63 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 in Big Data Hadoop by MD
 • 21,340 points • 63 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 in Big Data Hadoop by MD
 • 21,340 points • 45 views
0 votes
0 answers

Real time access to data in hadoop

We need to store customer billing data ...READ MORE

Apr 30 in Big Data Hadoop by anonymous
 • 120 points • 27 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 in Big Data Hadoop by MD
 • 21,340 points • 77 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 in Big Data Hadoop by Gitika
 • 29,010 points • 64 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 in Big Data Hadoop by MD
 • 21,340 points • 51 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 in Big Data Hadoop by MD
 • 21,340 points • 43 views
0 votes
0 answers

Hi. I keep on encountering the follow error when running conf in flume via flume-ng at line 189. Any possible solutions?

Running FLUME agent :     class: org.apache.flume.node.Application     arguments: -n agent1 ...READ MORE

Apr 22 in Big Data Hadoop by anonymous
 • 120 points • 48 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 in Big Data Hadoop by MD
 • 21,340 points • 175 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 in Big Data Hadoop by MD
 • 21,340 points • 44 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 in Big Data Hadoop by MD
 • 21,340 points • 54 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 in Big Data Hadoop by MD
 • 21,340 points • 42 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 in Big Data Hadoop by MD
 • 21,340 points • 95 views
0 votes
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 in Big Data Hadoop by MD
 • 21,340 points • 182 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 in Big Data Hadoop by MD
 • 21,340 points • 28 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 in Big Data Hadoop by MD
 • 21,340 points • 22 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 in Big Data Hadoop by MD
 • 21,340 points • 188 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 in Big Data Hadoop by MD
 • 21,340 points • 52 views
0 votes
1 answer

Implementation in Hadoop

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

Apr 3 in Big Data Hadoop by MD
 • 21,340 points • 48 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 in Big Data Hadoop by MD
 • 21,340 points • 293 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 in Big Data Hadoop by MD
 • 21,340 points • 31 views
0 votes
1 answer

How to create table in cassandra?

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

Apr 1 in Big Data Hadoop by MD
 • 21,340 points • 22 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 in Big Data Hadoop by MD
 • 21,340 points • 23 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 in Big Data Hadoop by MD
 • 21,340 points • 102 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 in Big Data Hadoop by MD
 • 21,340 points • 523 views
0 votes
1 answer

configure Cassendra in Linux system?

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

Apr 1 in Big Data Hadoop by MD
 • 21,340 points • 31 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 in Big Data Hadoop by anonymous
 • 55 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 in Big Data Hadoop by MD
 • 21,340 points • 28 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 in Big Data Hadoop by MD
 • 21,340 points • 90 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 in Big Data Hadoop by MD
 • 21,340 points • 80 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 in Big Data Hadoop by MD
 • 21,340 points • 38 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 in Big Data Hadoop by MD
 • 21,340 points • 47 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 in Big Data Hadoop by MD
 • 21,340 points • 131 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 in Big Data Hadoop by MD
 • 21,340 points • 336 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 in Big Data Hadoop by MD
 • 21,340 points • 167 views
0 votes
0 answers

Grant role is getting error, while executing

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

Feb 13 in Big Data Hadoop by Mahboob
 • 140 points • 134 views
0 votes
0 answers

Sentry: Grant role is getting error, while executing

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

Feb 13 in Big Data Hadoop by Mahboob
 • 140 points • 142 views
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