What is Apache Cassandra?
Cassandra is an open-source, distributed, Not Only SQL database management system designed to handle a large amount of across data.
How to install Cassandra? Cassandra simple to install on Ubuntu/Linux with step by step processing and why should be using Apache Cassandra in Data handled:
What is Apache HBase?
Hadoop + DataBase runs on top of the Hadoop eco-system. It is a Database which is an open-source, distributed, NoSQL database related. It provides random access and data stores in HDFS files that are indexed by key, values
How to install Apache HBase on Linux/Ubuntu system?
It is simple to the installation of HBase on the Linux operating system with step by step processing.
Installation of HBase on Ubuntu
Cassandra Connection error:
Error: Exception encountered during startup
java.lang.Illegal exceptionArgumentException is already in reerseMap to (Username) at org.apache.cassandra.utils.concurrentBiMap.put(concurrentBiMap.java:97) at org.apache.cassandra.config.schema.load(schema.java:406) at org.apache.cassandra.config.schema.load(schema.java:117)
HBase Connection Error:
Client.ConnectionManager$HConnection Implementation: Can't get connection to Zookeeper service connection loss for /hbase
After installation of Cassandra and HBase services on top of the Hadoop Eco-system I got this type of error. Anyone have found resolution please post it here.
Summary: In Hadoop eco-system Apache HBase, Cassandra services are most useful in the large data sets. After installation of Hadoop, I tried to install HBase, Cassandra on top of the Hadoop cluster in the Big Data environment system. I am getting both HBase, Cassandra connection error, already mentioned at the top of the page but I am unable to find out the resolution. Here is my resolution is I stopped the Apache HBase service and restart that after that I am getting another error. Meanwhile,, I stopped the Cassandra services and started the service then working fine but I am didn’t find the exact solution for the above errors if anyone finds its kindly post in the comment box.