Unauthorized connection for super-user: root from IP 127.0.0.1

When trying to upload files to hdfs through ambari console getting the below error

Unauthorized connection for super-user: root from IP 127.0.0.1

Looks like we have not added the mentioned IP Address properly inside the property: hadoop.proxyuser.root.hosts

If ambari-server daemon is running as root, we need to set up a proxy user for root in core-site by adding and changing properties in HDFS > Configs > Custom core-site:

1. hadoop.proxyuser.root.groups=*
2. hadoop.proxyuser.root.hosts=*

Open ambari console

Go to HDFS -> Configs

Click on Custom core-site

Modify the below parameters

Save the configuration

Click ok

Restart the affected components

After successful restart try to upload files now

How to get the windows operating system version from command prompt

Open command prompt

Navigate to C:\Windows\System32

Run winver.exe to get the version of operating system

ERROR: Attempting to operate on hdfs datanode as root

Getting error when we tried to start hadoop as a root user

To resolve this navigate to /usr/hdf/3.1.1.0-35/hadoop/etc/hadoop

open hadoop-env.sh file

Add the below lines

export HDFS_NAMENODE_USER="root"

export HDFS_DATANODE_USER="root"

export HDFS_SECONDARYNAMENODE_USER="root"

export YARN_RESOURCEMANAGER_USER="root"

export YARN_NODEMANAGER_USER="root"

Start hadoop now

How to skip prerequisite check while installing oracle softwares on linux operating system

Installing obiee software on linux throwing prerequisite check failed error

To install the software by ignoring the prerequisite check , issue the command as below

Running 32 bit software on Linux 64 bit operating system

Try to Run the 32 bit software on 64 bit operating systemWe will get below waring and resolution for it

Setting 32 bit emulation mode



Running the 32 bit software again

Installing NIFI

Downloading the software

Extracting the software

Configuring Nifi

Open nifi.properties for updating configurations

Save and close the file

Starting the Nifi server

Connect to Nifi data flow management url in your browser: http://localhost:8090/nifi/

Disable Archive Log Mode in Oracle Database

Connect to the database

Checking for the database log mode and its status

To disable the archive log mode shutdown the database first

Now start the database in mount

Now alter the database to non archive log mode






Now open the database






Check for the database log mode and its status now