Importing data into Apache Solr from Cassandra using dataimporthandler - solr

Question

Is it possible to import data from Cassandra into Apache Solr?
I am currently importing data from MySQL into Apache Solr using Solr's dataimporthandler. Is it possible to use Cassandra in place of MySQL?
Update 1:
I tried to connect to Cassandra from a simple Java program using the JDBC driver given here (https://code.google.com/a/apache-extras.org/p/cassandra-jdbc/). My idea was, if the java code works, Solr should also be to import from Cassandra. But it didn't work and I got the following error:
log4j:WARN No appenders could be found for logger (org.apache.cassandra.cql.jdbc.CassandraDriver).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/cassandra/cql/jdbc/AbstractJdbcType
at org.apache.cassandra.cql.jdbc.CassandraConnection.(CassandraConnection.java:146)
at org.apache.cassandra.cql.jdbc.CassandraDriver.connect(CassandraDriver.java:92)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at CqlConnection.main(CqlConnection.java:14)
Caused by: java.lang.ClassNotFoundException: org.apache.cassandra.cql.jdbc.AbstractJdbcType
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 5 more

Answer 1

Disclaimer - Never tried this, so cannot vouch for performance etc :)
Solr's DataImportHandler contrib uses JDBC to connect to a relational data source. Here is the official Solr Wiki about configuring JDBC
Now, for Cassandra, you could use the Cassandra-jdbc driver and setup your DIH config to have SQL that this driver supports.
Please note:
- I have not used Cassandra-jdbc in a production setup, so there might be shortcomings that you may want to consider piloting on.
- As mentioned above, I do not know the performance aspect as well - will recommend you spike it out.
Please post back any findings!