Troubleshooting tips¶

Mahout Jobs that Use Lucene Not Supported¶

DataStax does not currently support Mahout jobs, such as built-in support for creating vectors from Lucene indexes, that use Lucene features. Attempting to run Mahout jobs that use Lucene features results in this type of error message:

Error: class org.apache.mahout.vectorizer.
DefaultAnalyzer overrides final method
tokenStream.

MX4J warning message during installation¶

When Cassandra loads, you may notice a message that MX4J will not load and that mx4j-tools.jar is not in the classpath.

You can ignore this message. MX4j provides an HTML and HTTP interface to JMX and is not necessary to run Cassandra. DataStax recommends using OpsCenter. It has more monitoring capabilities than MX4J.

DSE Search/Solr cannot find custom files¶

Open Source Solr (OSS) supports relative paths set by the <lib> property in the solrconfig.xml, but DSE Search/Solr does not. Configuring Solr library paths describes a workaround for this issue.