SharePoint App part when fetch all the users from User profile getting Error Invalid Request

function getAllUsers() {

   //alert('GetallUserExecuted..');

   var ctx =new SP.ClientContext(appWebUrl);//Get the SharePoint Context object based upon the URL 

   var appCtxSite =new SP.AppContextSite(ctx, hostWebUrl);

   var web = appCtxSite.get_web();//Get the Site

   //Textbox value containing search term

   var searchTerm = $("[Id*='peoplePickerDiv_TopSpan_i:0#.f|membership|'][Id*='_ProcessedUser']")[0].id.split('|')[2].split('_')[0];

   clientContext = new SP.ClientContext.get_current();

   //Building Keyword query for the search

   var keywordQuery =new Microsoft.SharePoint.Client.Search.Query.KeywordQuery(ctx);

   keywordQuery.set_queryText(searchTerm);

   keywordQuery.set_sourceId("B09A7990-05EA-4AF9-81EF-EDFAB16C4E31");

   keywordQuery.set_rowLimit(500);

   keywordQuery.set_trimDuplicates(false);

   var searchExecutor =new Microsoft.SharePoint.Client.Search.Query.SearchExecutor(ctx);

   results = searchExecutor.executeQuery(keywordQuery);

   ctx.executeQueryAsync(onQuerySuccess, onQueryError);

}

function onQuerySuccess() {

   var testing = results.m_value.ResultTables[0];

   $.each(results.m_value.ResultTables[0].ResultRows, function () {

       users.push(this.AccountName);

   });

   fetchProfilePropertiesForUsers();

}

function onQueryError(sender, args) {

   alert(args.get_message());

}