For Cloudera Manager installations, if you have not yet added the Solr service to your cluster, do so from the Cloudera Manager->Home->Add Service dropdown. The Add a Service wizard automatically configures and initializes the Solr service.
Also in Cloudera Manager Hue->configuration->Hue Service Advanced Configuration Snippet (Safety Valve) for hue_safety_valve.ini remove Search from blacklist.
Cloudera manager->Hue->configuration and search for solr.
In the Solr Service->Hue(Service Wide) click on Solr button if it has none clicked.