You have a computer that has Microsoft SQL Server 2012 Analysis Services (SSAS 2012) installed.
There are many users who belong to different roles in SSAS 2012.
The users run some commands against an SSAS cube at the same time. For example, users run Select or Update Cube commands against the cube.
The users use the XMLA ClearCache command to frequently clear SSAS caches.
In this scenario, an internal exception access violation may occur and the SSAS server freezes. Additionally, you have to restart SSAS 2012.
Cumulative update information
Cumulative update 5 for SQL Server 2012 Service Pack 1
The fix for this issue was first released in Cumulative Update 5. For more information about how to obtain this cumulative update package for SQL Server 2012 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:
2861107 Cumulative update package 5 for SQL Server 2012 Service Pack 1
Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2012 Service Pack 1 fix release. We recommend that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
2772858 The SQL Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was released
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about how to clear SSAS caches, go to the following MSDN website: