Where did my process progress events go?

Today's post is about an elusive issue that was keeping us busy for a while.

When you process SSAS objects (database, cube, partition, dimension etc.) manually in SQL Server Management Studio (SSMS) or Business Intelligence Development Studio (BIDS), then you get a nice progress report window that shows you all processing stages:

 However, sometimes you do not get any processing events, just the success message "process succeeded",

There's a variation of this problem in that it claims to be waiting on trace data (that never arrive):  "Process succeeded. Trace information is still being transferred. If you do not want to wait for all the information to arrive press Stop."

We have never observed these issues on SSAS 2005, but confirmed occurences on SSAS 2008, SSAS 2008 R2 and even SSAS 2012. The issue is somewhat elusive because it only happens on certain machines, and even there usually on a random basis. The "Trace information is still being transferred" part of the problem can often (again not always) be removed by enabling "flight recorder". We had a few connect bugs filed for the problem area, but were never able to fix these issues completely. With more customers stumbling upon the issue and growing pain in customer support a thorough investigation of the problem was launched. As a result we found that all our issues were related to the asynchronous way that the SSMS/BIDS client connects to the session trace of the processing session.

This led to a number of potential timing problems ...

I'm pleased to announce that we know have a fix available that should address most (if not all) of the "missing process progress events" issues. At least it fixed the problem in all reproduction environments I had access to. Via changes in the AMO library we made sure that SSMS/BIDS clients now connect in a synchronous way, eliminating the timing problems.

This week we released the Fix as part of SQL Server 2008 R2 SP1 CU9:

Cumulative update package 9 for SQL Server 2008 R2 Service Pack 1 is available

which is accompanied by a proper KB article:

FIX: Empty or incomplete tree view is shown in the Process Progress window when you process an SSAS object in SSMS or BIDS in SQL Server 2008 R2

If everything goes according to schedule you can also expect it to be part of SQL Server 2008 R2 SP2 CU4  and SQL Server 2012 SP1.

So hopefully we won't hear about about missing process progress events anymore ...








Comments (4)

  1. Vidas M says:

    When can we expect fix for SQL Server 2012 environment? On my machine empty result set comes back 100% of times.

  2. mentioned it towards the end. The fix is scheduled to be released with SQL Server 2012 SP1. It was already part of the public beta SQL Server SP1 CTP4.

  3. Ivo says:

    Finally! I have figured out the root cause of this problem. It takes literally seconds to fix: when you process SSAS objects, the progress window is nothing but a log it writes at run time. What if you have no disk space when he tries to write the log? It doesn’t. So, the fix really is just a matter of freeing up disk space on the drive you have the SSAS logs being stored. Done!

  4. Tim says:

    Hello. Was this fix released for SQL Server 2012 SP1 or later? If later, may I know which release? Thanks in advance!

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