How to add extra field in hbase through nutch?

I am writing a nutch plugin at fetch time. I am doing some analysis on the fetched webpages and the results are to be stored in hbase corresponding to the webpage. I am not sure how to add an extra field and how to write data to that field using nutch.

Solution

If You want to add Additional Fields While indexing in Solr ::

If the value of the additional fields fixed (Static), then you can use the Nutch's index-static plugin.

It allows you to add a number of fields with their contents.

Step 1:

You first need to enable index.static property in nutch-site.xml

Step 2:

Add index.static property

<property>
 <name>index.static</name>
 <value>first_field:value,second_field:value</value>
 <description>
  Used by plugin index-static to adds fields with static data at indexing time. 
   You can specify a comma-separated list of fieldname:fieldcontent per Nutch job.
  Each fieldcontent can have multiple values separated by space, e.g.,
   field1:value1.1 value1.2 value1.3,field2:value2.1 value2.2 ...
   It can be useful when collections can't be created by URL patterns, 
  like in subcollection, but on a job-basis.
  </description>
</property>

Step 3:

Add field definition in schema.xml

Step 4:

Enabled the index in plugin.includes

Or You can follow https://wiki.apache.org/nutch/WritingPluginExample-1.2 for Writing Plugin