Sitecore 9 installation 503 error while requesting http://xp0.sc/sitecore/admin/PopulateManagedSchema.aspx?indexes=all

Hi,

During installation of sitecore 9, m getting below error

[---------------------------------------- UpdateSolrSchema : SitecoreUrl ---------------------------------------------
[UpdateSolrSchema]:[Requesting] xp0.sc/.../PopulateManagedSchema.aspx
Install-SitecoreConfiguration : Error requesting xp0.sc/.../PopulateManagedSchema.aspx
The remote server returned an error: (503) Server Unavailable.
At C:\resourcefiles\install.ps1:87 char:1
+ Install-SitecoreConfiguration @sitecoreParams
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException
+ FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Install-SitecoreConfiguration

[TIME] 00:04:49
Transcript stopped, output file is C:\WINDOWS\system32\sitecore-XP0.171116 (3).log
Invoke-SitecoreUrlTask : Error requesting xp0.sc/.../PopulateManagedSchema.aspx The
remote server returned an error: (503) Server Unavailable.
At C:\Program
Files\WindowsPowerShell\Modules\SitecoreInstallFramework\1.0.2\Public\Install-SitecoreConfiguration.ps1:253 char:21
+ & $entry.Task.Command @paramSet | Out-Default
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Write-Error], WriteErrorException
+ FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,Invoke-SitecoreUrlTask

 

Xpo.sc application pool is also getting stopped if trying to start manually.

 

Thanks 

  • Please verify if Solr use SSL and the same certificate is imported into your local storage.

    As far as I remember the other reason can be lack of ASP.NET 4.6 installed on IIS.