How to retrieve a List of Application Pools in a Server

From the UI

1. Open IIS Manager. For information about opening IIS Manager, see Open IIS Manager (IIS 7).

2. In the Connections pane, click Application Pools in the tree.

From Command Line

1. Open command prompt.

2. Type "cd C:\Windows\System32\inetsrv" [Appcmd.exe exists at the location %systemroot%\system32\inetsrv\]

3. Type "appcmd list apppool"

Identify the Application Pool for a Service Application

1) Start –>Run –> inetmgr

2) Under the Sites click on SharePoint Web Services. This will list down the Services in SharePoint.

3) Click on each GUID –> Change the view from Features View to Content View

4) On finding SearchService.svc -> Right click that web service -> Manage Application -> Advanced Settings.

5) Identify the Application Pool (make a note of this).

6) Now in IIS –> Application Pools –> choose the Application Pool you noted down in previous step   -> Recycle (recycle the application pool).

Internal server error exception: System.NullReferenceException: Object reference not set to an instance of an object

Error Description

Recently I came across this error with SharePoint Search. I was searching in a SharePoint list and got the below error.

Error

Internal server error exception:

Troubleshoot issues with Microsoft SharePoint Foundation.

On checking the ULS logs I found the below entries

01/28/2015 10:59:51.10         w3wp.exe (0x31D8)                0x2030    SharePoint Server Search      Query      fm9a        Unexpected                CoreResultsWebPart::OnInit: Exception initializing: System.NullReferenceException: Object reference not set to an instance of an object.     at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.SetPropertiesOnQueryReader()     at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.OnInit(EventArgs e)               7001a8bf-b506-4096-b46b-003fbb5ec91b

01/28/2015 10:59:51.10         w3wp.exe (0x31D8)                0x2030    SharePoint Server Search      Query      g1j9         Exception                Internal server error exception: System.NullReferenceException: Object reference not set to an instance of an object.     at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.SetPropertiesOnQueryReader()     at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.OnInit(EventArgs e) System.NullReferenceException: Object reference not set to an instance of an object.     at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.SetPropertiesOnQueryReader()     at Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.OnInit(EventArgs e)               7001a8bf-b506-4096-b46b-003fbb5ec91b

01/28/2015 10:59:51.10         w3wp.exe (0x31D8)                0x2030    SharePoint Server  Unified Logging Service       c91s        Monitorable                Watson bucket parameters: SharePoint Server 2010, ULSException14, 06175311 "sharepoint server search", 0e001b67 "14.0.7015.0", 17853a8f "microsoft.office.server.search", 0e001bd1 "14.0.7121.0", 531f1826 "tue mar 11 10:05:26 2014", 000032a4 "000032a4", 0000002d "0000002d", 4a6d3421 "nullreferenceexception", 67316a39 "g1j9"    7001a8bf-b506-4096-b46b-003fbb5ec91b

Solution 1

If you go into Central Administration -> System Settings -> Manage Services on Server. Make sure the below services are started.

- SharePoint Server Search

- Search Query and Site Settings Service

Solution 2

Click through all the Search Administration pages in Central Admin.Click through all the Search Administration pages in Central Admin. Now perform the search again. The issue should have disappeared.

Solution 3

Identify the underlying application pool for search (Reference)

Perform an application pool recycle

An exception occurred when trying to issue security token: The HTTP service located at http://localhost:32843/SecurityTokenServiceApplication/securitytoken.svc/actas is too busy.

There was an unexpected server reboot for our applications server and our service application features were failing. On checking, I noticed the below error in the Windows Event Viewer

Event ID: 8306

An exception occurred when trying to issue security token: The HTTP service located at http://localhost:32843/SecurityTokenServiceApplication/securitytoken.svc/actas is too busy.

On browsing to http://localhost:32843/SecurityTokenServiceApplication/securitytoken.svc ,  I got the below error

Fix

Identify the application pool for the Service Applications.

Application Pool -> Check Status -> Start