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You're reading from  HBase Essentials

Product typeBook
Published inNov 2014
Reading LevelIntermediate
Publisher
ISBN-139781783987245
Edition1st Edition
Languages
Java
Tools
HBase
Concepts
Databases
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Author (1)
Nishant Garg
Nishant Garg
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Nishant Garg

Nishant Garg has over 17 years' software architecture and development experience in various technologies, such as Java Enterprise Edition, SOA, Spring, Hadoop, Hive, Flume, Sqoop, Oozie, Spark, Shark, YARN, Impala, Kafka, Storm, Solr/Lucene, NoSQL databases (such as HBase, Cassandra, and MongoDB), and MPP databases (such as GreenPlum). He received his MS in software systems from the Birla Institute of Technology and Science, Pilani, India, and is currently working as a technical architect for the Big Data RandD Group with Impetus Infotech Pvt. Ltd. Previously, Nishant has enjoyed working with some of the most recognizable names in IT services and financial industries, employing full software life cycle methodologies such as Agile and SCRUM. Nishant has also undertaken many speaking engagements on big data technologies and is also the author of Apache Kafka and HBase Essentials, Packt Publishing.
Read more about Nishant Garg

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Troubleshooting

An HBase cluster does not run smoothly and expectedly sometimes, especially with bad configuration. This section covers the troubleshooting tools and techniques in brief for the HBase cluster running with ambiguous status. There are certain tools that are used while troubleshooting the HBase cluster. The following are some of the important tools that are preferred to be known to the administrators:

  • jps: This tool shows the Java processes running for the current user.

    $ $JAVA_HOME/bin/jps

  • jmap: This tool is used to view the Java heap summary. For example, the following command shows the summary for the HRegionServer daemon's heap:

    $ $JAVA_HOME/bin/jmap -heap 1812

  • ps: This tool is used to view the occupied memory by the processes. The following command uses the –rss flag to view sort processes in the descending order by their resident set size as:

    $ ps auxk -rss | less

  • jstat: This tool is used for monitoring the Java Virtual Machine. Run the following command to show the...

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HBase Essentials
Published in: Nov 2014Publisher: ISBN-13: 9781783987245
© 2014 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Nishant Garg

Nishant Garg has over 17 years' software architecture and development experience in various technologies, such as Java Enterprise Edition, SOA, Spring, Hadoop, Hive, Flume, Sqoop, Oozie, Spark, Shark, YARN, Impala, Kafka, Storm, Solr/Lucene, NoSQL databases (such as HBase, Cassandra, and MongoDB), and MPP databases (such as GreenPlum). He received his MS in software systems from the Birla Institute of Technology and Science, Pilani, India, and is currently working as a technical architect for the Big Data RandD Group with Impetus Infotech Pvt. Ltd. Previously, Nishant has enjoyed working with some of the most recognizable names in IT services and financial industries, employing full software life cycle methodologies such as Agile and SCRUM. Nishant has also undertaken many speaking engagements on big data technologies and is also the author of Apache Kafka and HBase Essentials, Packt Publishing.
Read more about Nishant Garg

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