Error 503 {metadata={error-class=org.apache.solr.common.SolrException,root-error-class=org.apache.solr.common.SolrException},msg=SolrCore is loading,code=503}

Solr HTTP error: OK (503) Error 503 {metadata={error-class=org.apache.solr.common.SolrException,root-error-class=org.apache.solr.common.SolrException},msg=SolrCore is loading,code=503}

HTTP ERROR 503

Problem accessing /solr/products/select. Reason:

    {metadata={error-class=org.apache.solr.common.SolrException,root-error-class=org.apache.solr.common.SolrException},msg=SolrCore is loading,code=503}