Possible fix for issue #6962

scripts/lua/rest/v2/get/host/l4/contacted_hosts_data.lua

@@ -31,8 +31,8 @@ if(host and host.cardinality) then
   series[#series + 1] = tonumber(host.cardinality.num_contacted_hosts_as_client or 0)
   series[#series + 1] = tonumber(host.cardinality.num_contacted_hosts_as_server or 0)
 else
-  series[#series + 1] = {}
-  series[#series + 1] = {}
+  series[#series + 1] = 0
+  series[#series + 1] = 0
 end
 
 colors[#colors + 1] =  graph_utils.get_html_color(#colors + 1)

scripts/lua/rest/v2/get/host/l4/proto_data.lua

@@ -66,6 +66,13 @@ rsp["series"] = series
 rsp["labels"] = labels
 rsp["colors"] = colors
 
+-- Just in case no data were found put an empty serie
+if table.len(rsp["series"]) == 0 then
+  rsp["series"] = { 0 }
+  rsp["labels"] = { i18n('no_data_available') }
+  rsp["colors"] = { graph_utils.get_html_color(#colors + 1) }
+end
+
 -- ##################################
 
 rest_utils.answer(rest_utils.consts.success.ok, rsp)

scripts/lua/rest/v2/get/host/l7/data.lua

@@ -19,7 +19,7 @@ local rsp = {}
 
 -- Applications
 if view == 'applications' and host then
-  local host_applications = host["ndpi"]
+  local host_applications = host["ndpi"] or {}
 
   -- Calculate the total bytes sent and received, to calculate the percentages
   for _, v in pairs(host_applications) do
@@ -45,7 +45,7 @@ if view == 'applications' and host then
 elseif host then
 -- Categories
   local categories_utils = require "categories_utils"
-  local host_categories = host["ndpi_categories"]
+  local host_categories = host["ndpi_categories"] or {}
 
   -- Calculate the total bytes sent and received, to calculate the percentages
   for _, v in pairs(host_categories) do