Tag - hadoop

hadoop hive

Apache Hive 3.0.0 Installation on Windows 10 Step by Step Guide

105   0   about 4 days ago

If you have been following my website, you would know I’ve published a number of articles about installing big data tools/framewo...

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hadoop yarn hdfs

Install Hadoop 3.0.0 in Windows (Single Node)

13,998   15   about 2 years ago

This page summarizes the steps to install Hadoop 3.0.0 in your Windows environment. Reference page: https://wiki.apache.org/hadoop/Hadoop2OnWindows ...

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lite-log hadoop hdfs

Copy Files from Hadoop HDFS to Local

17   0   about 23 days ago

Copy file from HDFS to local Use the following command: hadoop fs [-copyToLocal [-f] [-p] [-ignoreCrc] [-crc] <src> ... <localdst>] For example, copy a file from /hdfs-file.txt in HDFS to local /tmp/ using the following command: ...

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lite-log hadoop

Hadoop on Windows - UNHEALTHY Data Nodes Fix

13   0   about 24 days ago

Solution to fix the issue If you have been running Hadoop on Windows machines, you may encounter issues about unhealthy data nodes. Usually this will happen if there is no enough disk space in your local drive. For example, if I start the HDFS and YARN demons under the context...

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lite-log hadoop hdfs

Hadoop datanode issue and resolution - ‘Incompatible clusterIDs’

212   0   about 24 days ago

Issue After finishing installation Hadoop 3.0.0 in my Windows: Install Hadoop 3.0.0 in Windows (Single Node) , I got the following error after I formated the name node several ti...

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lite-log hadoop sqoop

Password Security Solution for Sqoop

56   0   about 4 months ago

In Sqoop, there are multiple approaches to pass in passwords for RDBMS. Options Option 1 - clear password through --password argument sqoop [subcommand] --username user --password pwd This is the weakest approach as password is exposed directly...

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lite-log hadoop hdfs

Resolve Hadoop RemoteException - Name node is in safe mode

237   0   about 11 months ago

In Safe Mode, the HDFS cluster is read-only. After completion of block replication maintenance activity, the name node leaves safe mode automatically. If you try to delete files in safe mode, the following exception may raise: org.apache.hadoop.ipc.RemoteException(org.apac...

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hadoop hdfs parquet sqoop

Configure Sqoop in a Edge Node of Hadoop Cluster

1,142   0   about 11 months ago

This page continues with the following documentation about configuring a Hadoop multi-nodes cluster via adding a new edge node to configure administration or client tools. ...

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hadoop yarn

Configure YARN and MapReduce Resources in Hadoop Cluster

968   0   about 11 months ago

When configuring YARN and MapReduce in Hadoop cluster, it is very important to configure the memory and virtual processors correctly. If the configurations are incorrect, the nodes may not be able to start properly and the applications may not be able to run successfully. For example...

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hadoop yarn hdfs

Configure Hadoop 3.1.0 in a Multi Node Cluster

4,187   0   about 11 months ago

Previously, I summarized the steps to install Hadoop in a single node Windows machine. Install Hadoop 3.0.0 in Windows (Single Node) In this page, ...

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