Looking at the log file on our CM server, I noticed that there are a lot of warnings getting logged as follows:
6128 00:01:09 WARN Request is redirected to document not found page. Requested url: /Error/404?item=%2f&user=sitecore%5cAnonymous&site=scheduler, User: sitecore\Anonymous, Website: scheduler
Several of these log entries show up every minute.
We do have several scheduled tasks running but nothing that is set to trigger off that often.
I have verified the the scheduling site is listed below the main website as per this ticketHow/Why would the scheduler website log attempts to access it's home page? question. (Sitecore Slack Question 2200)
ShowConfig.aspx sites section:
<sites>
<site name="shell" virtualFolder="/sitecore/shell" physicalFolder="/sitecore/shell" rootPath="/sitecore/content" startItem="/home" language="en" database="core" domain="sitecore" loginPage="/sitecore/login" content="master" contentStartItem="/Home" enableWorkflow="true" enableTracking="false" analyticsDefinitions="content" xmlControlPage="/sitecore/shell/default.aspx" browserTitle="Sitecore" htmlCacheSize="10MB" registryCacheSize="15MB" viewStateCacheSize="1MB" xslCacheSize="25MB" disableBrowserCaching="true" contentLanguage="en" enableItemLanguageFallback="false" enableFieldLanguageFallback="false" itemwebapi.mode="StandardSecurity" itemwebapi.access="ReadWrite" itemwebapi.allowanonymousaccess="false"/>
<site name="login" virtualFolder="/sitecore/login" physicalFolder="/sitecore/login" enableTracking="false" database="core" domain="sitecore" disableXmlControls="true" language="en"/>
<site name="admin" virtualFolder="/sitecore/admin" physicalFolder="/sitecore/admin" enableTracking="false" enableWorkflow="true" domain="sitecore" loginPage="/sitecore/admin/login.aspx"/>
<site name="service" enableTracking="true" virtualFolder="/sitecore/service" physicalFolder="/sitecore/service"/>
<site name="modules_shell" virtualFolder="/sitecore modules/shell" physicalFolder="/sitecore modules/shell" rootPath="/sitecore/content" startItem="/home" language="en" database="core" domain="sitecore" content="master" enableTracking="false" enableWorkflow="true"/>
<site name="modules_website" virtualFolder="/sitecore modules/web" physicalFolder="/sitecore modules/web" rootPath="/sitecore/content" startItem="/home" language="en" database="web" domain="extranet" allowDebug="true" cacheHtml="true"/>
<!-- PROD CM -->
<site name="clientname" hostName="wcm.clientname.com.au" targetHostName="www.clientname.com.au" database="master" virtualFolder="/" physicalFolder="/" rootPath="/sitecore/content/clientname" startItem="/Home" dictionaryPath="/sitecore/content/clientname/Content Modules/Dictionary" dictionaryAutoCreate="true" domain="clientname" allowDebug="true" cacheHtml="false" htmlCacheSize="50MB" registryCacheSize="0" viewStateCacheSize="0" xslCacheSize="5MB" filteredItemsCacheSize="10MB" enablePreview="true" enableWebEdit="true" enableDebugger="true" disableClientData="false" cacheRenderingParameters="true" renderingParametersCacheSize="10MB" formsRoot="/sitecore/content/clientname/Content Modules/Forms/WebForms" loginPage="/login" enableItemLanguageFallback="true" patch:source="clientname.Website.config"/>
<site name="scheduler" enableTracking="false" domain="sitecore"/>
<site name="system" enableTracking="false" domain="sitecore"/>
<site name="publisher" domain="sitecore" enableTracking="false" enableWorkflow="true"/>
</sites>
