Unable To Call Into C Compiler !?

Following on from my previous blog post I mentioned that I had to find a solution to the “unable to call into C compiler” message. This meant that the specific SQL Server database in question (that contained in-memory tables) went into recovery pending mode, meaning that recovery needed to run but something was preventing it from even starting.

broken

Naturally (whether right or wrong) I thought that it could be corruption and I didn’t want to rule it out. I headed straight to the error log to see if it could guide me, all this did was confuse me. However after some research it led me to conclude that “Unable to call into the C compiler GetLastError = 2” for the specific error code shown below meant that a specific file(s) could not be found, I was thinking exactly what file(s)?

This is a snippet from the error log when the database went through recovery – Seems to even struggle during the analysis phase and the checkpoint failure was throwing me off slightly.

errorcomplier

Being desperate I tried code to switch it online.

ALTER DATABASE [NEWdb] SET ONLINE;

mainerror

Intimidating right? I didn’t really know where to start but  I headed down the CHECKDB route, if anything to rule it out from my checklist. In case you are wondering, what I personally do for a troubleshooting exercise is that I write things down regarding areas that I want to explore/analyse and ideally remove from the list.

ALTER DATABASE [NEWdb] SET EMERGENCY;
GO
SELECT name, state_desc FROM sys.databases

emergencycode

I noticed the creation of a xtp folder where it was followed by another folder called 8 being the DBID (was never there before)

xtp

I then issued the consistency check – It was taking its time, perhaps a deep dive?

checkdb101

A great sign!? Not really. No corruption meant I had to go down a different route.

So it wasn’t corruption?

Alas, I was  back at square 1.

errorcode1

Snippet from the error log

I decided to track real time what SQL Server was trying to do via a tool called process monitor. I created a filter to look for sqlservr.exe and went through recovery and watched what was happening real-time. I could see the data files were being read for all the other databases, then I got to the problematic database and  the “path not found messages caught my attention”.

nopath

Zoomed in version to confirm file path location:

zoomed

This wasn’t a case of corruption, more so a corrupt install of SQL Server. I with my limited knowledge felt that bringing out the install binaries for a repair was my best option here.

repairinstall

As soon the repair completed I marched my way to the Binn folder to see if the VC folder was created along with other files  (i.e. cl.exe) – and it was.

binns

Was this what I needed then?

YES IT WAS – Recovery was successful and I was able to login and query my in-memory based tables.

online

ok

Even though the ending might have been an anti-climax I hope you enjoyed reading how I conquered this mini-challenge. If you ever encounter this sort of issue in real-life then my advice is –

tea

Then start your investigations with a clear mind.

One thought on “Unable To Call Into C Compiler !?

  1. Pingback: C Complier Errors With Memory-Optimized Objects – Curated SQL

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s