ISSUE:- Cronjobs not working for kerberos enabled hadoop. Throwing below error. ERROR tool.ImportTool: Encountered IOException running import job: java.io.IOException: Failed on local exception: java.io.IOException: javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)]; Solution:- This is because there is no TTY, Profile setup for the … Continue reading Crontab not working for kerberized hadoop
The default OS disk size for most Linux distros in Azure is 30GB and in certain circumstances you may need to increase the size of it. The steps below helps in achieving this. Note: Before proceeding it’s highly recommended that you backup your Azure VM first. You can do this using Azure Backup or use AzCopy … Continue reading How to resize the Linux VM OS disk in Azure
ISSUE: Unable to see logs via Resource Manager UI due to incorrect permissions for the default user dr.who in ACL enabled clusters SOLUTION: Add/change the below property in core-site.xml to solve the issue. Other values such as hdfs or mapred will also solve the issue. hadoop.http.staticuser.user=yarn
When you face an error with yum as below ============ [root@tnode1~]# yum repolist all Loaded plugins: product-id, security, subscription-manager : [Errno 14] Peer cert cannot be verified or peer cert invalid ============ Add “sslverify=false” in the ‘/etc/yum.conf’ file to solve this.
Login via ssh Enter sudo su – Check whether root access is configured or not by command grep root /etc/shadow (LOCK means root access is disabled (default)) [root@node1 ~]# grep root /etc/shadow root:*LOCK*:3600:::::: 4. Enable root access by command passwd [root@node1 ~]# passwd
1.Install JAVA #yum install java-1.7.0-openjdk-devel 2.Install tomcat We are going to install Tomcat in /usr/local #cd /usr/local #wget http://apache.mirrors.ionfish.org/tomcat/tomcat-8/v8.5.9/bin/apache-tomcat-8.5.9.tar.gz #tar zxvf apache-tomcat-8.5.9.tar.gz 3. Start tomcat #cd /usr/local/apache-tomcat-8.5.9/bin #./startup.sh 4. Check the Tomcat web UI with http://server_IP_address:8080 5. Configure Tomcat Web Management Interface by adding the user as below Open the conf file #vi /usr/local/apache-tomcat/conf/tomcat-users.xml add the below entry … Continue reading How To Install Apache Tomcat 8 on CentOS 7
While accessing oozie console it show the below error ========== Oozie web console is disabled. To enable oozie web console install the Ext JS library ========= Follow the steps below to solve this in cloudera distribution Download ext-2.2.zip from https://archive.cloudera.com/gplextras/misc/ext-2.2.zip and Extract the contents of the file to /var/lib/oozie/ on the same host as … Continue reading Enabling the Oozie Web Console