Error: the following database error occured:

SQLSTATE[HY000]: General error: 2006 MySQL server has gone away

The query that caused the error is:

SELECT c.ID as category_id, c.category_name, c.category_name_en, k.ID AS keyword_id, k.keyword_name, k.keyword_name_en 
			FROM u_facet_members k, u_facet_categories c 
			WHERE k.category_id=c.ID 
			AND c.site='nt2'
			ORDER BY k.order_number ASC





Technical info:

[1] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/xsite/classes/C_DB.php, line: 97, function: C_DB::reportQueryError

[2] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/xsite/classes/C_DB.php, line: 110, function: C_DB::executeQuery

[3] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/page_elements/product_overzicht/class.C_FacetNavigationTool.php, line: 267, function: C_DB::fetchRecordset

[4] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/page_elements/product_overzicht/class.C_FacetNavigationTool.php, line: 102, function: C_FacetNavigationTool->setAllMembersArray

[5] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/page_elements/product_overzicht/class.C_FacetNavigationTool.php, line: 91, function: C_FacetNavigationTool->init

[6] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/page_elements/product_overzicht/class_product_overzicht.php, line: 185, function: C_FacetNavigationTool->__construct

[7] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/xsite/classes/C_Node.php, line: 59, function: C_ProductOverzicht->__construct

[8] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/xsite/classes/C_Node.php, line: 17, function: C_Node->readBlockData

[9] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/xsite/classes/C_Page.php, line: 312, function: C_Node->__construct

[10] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/xsite/classes/C_Page.php, line: 185, function: C_Page->readChildnodes

[11] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/xsite/classes/C_Page.php, line: 196, function: C_Page->prepare

[12] /home/stag/domains/webshop40.staging-freshbits.nl/public_html/index.php, line: 140, function: C_Page->renderPage