HTTP-API could not open database / indexing.crash-marker / used by another process

[Victor Yap]

Hello RavenDB Community!

How bad is this kind of problem? I personally categorize the issue as "unpredictable and extremely frustrating" and "what is going on with the RavenDB architecture?!"

Invoke-WebRequest : {

"Error":

"Could not open database named: RavenContentStore"

,"Reason":

"System.AggregateException: One or more errors occurred. --->

System.IO.IOException:

The process cannot access the file 'C:\\web_project\\DB\\Databases\\RavenContentStore\\Indexes\\indexing.crash-marker' because it is being used by another process.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

[...]

I recycled the "ContentStore" AppPool (RavenDB running as web app) and was able to successfully commit my HTTP-API request by sending it again.

Thanks,

// Victor

[Michael Yarichuk]

The first thing that comes to my mind is anti-virus/malware software. This kind of errors usually happen when another process locks the files

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Best regards,

 

Hibernating Rhinos Ltd  

Michael Yarichuk l RavenDB Core Team 

Office: +972-4-622-7811 l Fax: +972-153-4-622-7811

 

RavenDB paving the way to "Data Made Simple"   http://ravendb.net/  

[Victor Yap]

Hi Michael,

I doubt it's anti-virus or anti-malware since this instance is a development virtual machine. Shouldn't RavenDB prevent other processes from locking its files?

Instead of an anti-virus, could it be the fault of the IIS / AppPool for putting the RavenDB Web App to "sleep" and causing it to let go of its files? Just a random guess. I'm not yet intimately knowledgeable about the Microsoft server stack and its bag of tricks.

This kind of behaviour is totally not normal for me in DBMS "features", so, it's basically red alert alarms going off. I'm not particularly keen on drilling down into all the quirks of the Microsoft IIS, Web App, App Pool stack, so, I'd like to rely on your support to know those things inside and out.

Thanks,

// Victor

[Oren Eini (Ayende Rahien)]

Are you running this with overlapped true?

Hibernating Rhinos Ltd  

Oren Eini l CEO l Mobile: + 972-52-548-6969

[Victor Yap]

"overlapped true" - never heard of this.

What does it mean? How would I find out?

[Oren Eini (Ayende Rahien)]

iis overlapped recycling

[Victor Yap]

Here is what I see in IIS' "Advanced Settings" for the App Pool.

• Recycling
• Disable Overlapped Recycling = True

Is this a good configuration, or a bad one?

Thanks,

// Victor

[Oren Eini (Ayende Rahien)]

Yes, that is good