Frequently Asked Questions on using MySQL on Oracle Big Data Appliance with Hadoop Components
(Doc ID 1542128.1)
Last updated on FEBRUARY 07, 2022
Applies to:
Big Data Appliance Integrated SoftwareLinux x86-64
Purpose
This document provides answers to frequently asked questions about using MySQL with Oracle Big Data Appliance and Hadoop Components.
Questions and Answers
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In this Document
| Purpose |
| Questions and Answers |
| Is it possible to upgrade MySQL on the BDA from MySQL 5.7.27 or 5.7.32 or an older MySQL 5.7 version to MySQL 5.7.33 or MySQL 5.7.34? |
| Is replication setup for MySQL(which manages CM and Hadoop Stack) on BDA? |
| Is enabling of transparent data encryption (TDE) on MySQL supported on the BDA? |
| Is automatic failover configured between primary MySQL and backup? |
| Is automatic purging of MySQL binary logs enabled on BDA? |
| On BDA V2.0.1 receiving a deadlock error popup when re-starting the HDFS service in Cloudera Manager(CM). How can I resolve this? |
| When trying to run Sqoop seeing exception: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure. How can I resolve this? |
| Getting exception: "not allowed to connect to this MySQL server" when trying to run Sqoop. How can I resolve this exception? |
| On multi-rack Oracle Big Data Appliance (BDA) V2.0.1 or client when trying to execute Hive commands it fails. How can I resolve this? |
| On BDA V3.0.1 does MySQL support automatic failover? |
| On BDA V4.2.0 does MySQL support automatic failover? |
| If /var/lib/mysql is filling up what are the options? |
| If needed what would be the best way to restore a backed up MySQL database? |
| In the case where the MySQL master has a failure what information is there on promoting the MySQL slave to the master? |
| References |