Object reference not set to an instance of an object + Unable to display this webpart + Error while executing webpart in SharePoint 2010

Problem Description: XSLT list views do not work / TIMEOUT FOR XML TRANSFORMATIONS

Error Message#1: Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Microsoft SharePoint Foundation-compatible HTML editor such as Microsoft SharePoint Designer. If the problem persists, contact your Web server administrator.

Error Message#2: Error while executing web part: System.NullReferenceException: Object reference not set to an instance of an object.

Debugging SP Logs:

0x1578 SharePoint Foundation         Web Parts                     89a1

High     Error while executing web part: System.NullReferenceException: Object reference not set to an instance of an object.     at System.Xml.Xsl.XslCompiledTransform.Load(MethodInfo executeMethod, Byte[] queryData, Type[] earlyBoundTypes)     at Microsoft.Xslt.STransform.GetCompiledTransform()     at Microsoft.SharePoint.WebPartPages.BaseXsltListWebPart.LoadXslCompiledTransform(WSSXmlUrlResolver someXmlResolver)     at Microsoft.SharePoint.WebPartPages.DataFormWebPart.GetXslCompiledTransform()     at Microsoft.SharePoint.WebPartPages.DataFormWebPart.PrepareAndPerformTransform(Boolean bDeferExecuteTransform)

Resolution:  After analysing the complete SharePoint environment, we realized that if this issue started recently so there must be some changes happened with respect to the updates. When we checked the updates then we found that there are some windows updates got installed recently but difficult to find out the culprit.

Here it comes the MICROSOFT as a LIFE SAVER and remove your headache by means of this issue. Millions Thanks to Microsoft once again!!!

Please refer the following Microsoft TechNet thread:

http://social.msdn.microsoft.com/forums/windowsazure/ru-ru/871a0661-05d0-4f3a-b66d-2504552142bd/error-while-executing-web-part-systemnullreferenceexception-object-reference-not-set-to-an

ALSO- http://support.microsoft.com/kb/2872441

Overall conclusion is:

If you want to get rid of this issue then please refer the following steps:

-Uninstalled this update: Windows KB2844286

-Hide the update

-reboot the server

Thank you very much for reading this article.

If you would like to share some updates from your side with respect to this issue (any new resolution, any new findings, new easy resolution apart from the above mentioned) then please share so that it would be useful for the whole community. 

The content databases in this cluster are full. You cannot add more web sites until you change the content database web site capacity settings or add more content databases

SharePoint capacity planning plays a very vital role with respect to any farm, whether it’s a small farm, medium farm or large farm. Today I am going to share some details and troubleshooting steps regarding one issue that I faced recently.

Problem Description: we have received the following error message while creating the site collection.

Error Message: The content databases in this cluster are full. You cannot add more web sites until you change the content database web site capacity settings or add more content databases.

Troubleshoot issues with Microsoft SharePoint Foundation.

Troubleshooting done: From the above error message, 2 points comes into the picture i.e. database size and number of site collections exist in a single database.

-Based on analysis, we found out that total site collections exist are 100 and size of the database was 67GB.

-checked the managed databases section in central administration with respect to that web application under which we are trying to create a site collection. We found out that somebody has changed the maximum site collection limit to 100 and that’s why we were facing that error message.

Resolution:

Please refer the following steps to get rid of this error message:

-Central administration

-Application management

-manage databases

-select the appropriate web application from the top

-change the maximum site collection limit to 15000 and warning set to 9000.

That’s it. After this we are able to create site collections without any issues.

If you have any queries/issues regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you. 

Performance and capacity management- SP2010

Sharing some useful links with respect to the capacity planning: 

https://www.simple-talk.com/dotnet/.net-tools/database-management-for-sharepoint-2010/

http://blogs.msdn.com/b/kaevans/archive/2012/03/27/what-every-sharepoint-admin-needs-to-

know-about-host-named-site-collections.aspx

http://www.sharepointsharon.com/2011/08/sharepoint-2010-performance-and-capacity-limits/

http://www.sharepointfix.com/2010/07/adding-new-content-database-in.html

http://technet.microsoft.com/en-us/library/cc262971(v=office.14).aspx

http://www.microsoft.com/en-in/download/details.aspx?id=21307

http://technet.microsoft.com/en-us/library/cc261700.aspx

http://technet.microsoft.com/en-us/library/ff758645.aspx

http://technet.microsoft.com/en-us/library/gg604780(v=office.14).aspx

http://technet.microsoft.com/en-us/library/cc298801(v=office.14).aspx

http://blogs.msdn.com/b/infopath/archive/2010/04/19/capacity-planning-for-sharepoint-2010.aspx