The w3wp.exe process is throwing the following ConfigurationErrorsException:
An error occured loading a configuration file: The process cannot access file file 'web.config' becuase it is being used by another process
Here's what we've determined so far:
The error is intermittant! Sometimes a refresh of the page in the browser is enough to kickstart it again. Sometimes not. The file is locked enough that we cannot open it using notepad when connected directly on the web server.
Because of the intermittent appearance of this error, it does not appear to be a file permission issue.
We have multiple applications under this exact configuration that are having this issue. They are in separate application pools. There have been no changes to the application code around the time that the errors started occuring.
We cannot find any processes other than the w3wp.exe that are accessing this file.
Our web application does not write any changes to the web.config file, only reads values from it.
This error is happening on multiple servers in our web farm
We cannot replicate this error in our development environment. It only occurs in production.
The application are running on x64 servers (Win 2008 Server), using the .NET 4.0 Framework.
Ideas?
In my case the webconfig file was opened in one of the tabs of notepad++ and even the notepad++ was in closed state, once I opened and closed the notepad++ problem disappeared. This suggests checking all instances of file opening is essential.
Related
I'm trying to remote debug an application that I have occasionally in the past without problem. I have a shared directory that I use for output on the remote machine, remote debugging tools are running on the machine and working fine. The folder has "everyone" permissions to be sure.
When I rebuild, all output files are generated, including the one I'm trying to debug. I'm then given an error,
"Error while trying to run project: Unable to start program
'D:\MyShare\MyApp.exe'.
The system cannot find the file specified"
This is particularly odd because the file exists, it just created it, and I can execute it manually just fine, either locally, or on the remote machine. I've checked with Process Monitor and that suggests the file is fine, so Visual Studio seems to be able to see the program just fine, not sure what's causing the error.
I've restarted both sides without luck.
Typical, I resolve it just the second I post this... The solution was to use the full UNC Share path, not the mapped drive path.
so my project 'Output Path' of
d:\myshare\
became
\\somepc\myshare
Now it all works as expected.
I have a C# executable reading and updating it's configuration file (app.exe.config) at runtime, specifically, the "appSettings" section. After I make two changes to two key values and save them using the Configuration.Save() method, an "access to the path" error is thrown, but only on some users' machines (so far 2 reports out of 10,000). We have never seen this issue in-house, only in production.
The Configuration.Save() method seems to be the issue based on our program's log file. When a problem with this call happens a "ConfigurationErrorsException" occurs because the configuration file could not be written to -or- the configuration file has changed. The configuration file is in the same directory as the application. This is a Dot Net 4 application running on a Windows 7 PC.
The code is:
Configuration configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
configuration.AppSettings.Settings["Last Updated Package"].Value = packageVersion;
configuration.AppSettings.Settings["Copy Updated Files"].Value = bool.TrueString;
configuration.Save(ConfigurationSaveMode.Minimal);
ConfigurationManager.RefreshSection("appSettings");
The error is:
An error occurred loading a configuration file: Acces to the path 'C:\Program Files (x86)\My Program\bin\guaixcax.tmp' is denied. (C:\Program Files (x86)\My Program\bin\MyProgram.exe.Config)
Is this a permissions issue, or can I add something to either the code or config file to fix this issue?
I have had similar issues with .NET program installations. It has always been a permissions issue. To test if this is your problem, you should try running your application as an unprivileged user - developers tend to have administrator rights...whenever they can manage it.
If it fails, edit the security of the config file (as an administrator) to allow the "Users" group write access to your "bin" folder, and try it again. If it works, you've identified the problem. Then you can figure out what the best solution is. Some options would be:
Set access rights to necessary files/folders from your installer to work for the users that will run the application
Run the application as a user with admin rights (NOT a good idea from a security best-practices point of view)
Instead of modifying the main app settings file, create a separate settings section referencing a file that has the data that can be changed:
<configuration>
<configSections>
...
<section name="MyChangableSettings" type="My.Namespace, ChangableSettingsClass"/>
</configSection>
...
<MyChangableSettings configSource="Path\To\Writable\StorageDir\mySettings.config"/>
</configuration>
I am using C# with .net 3.5
I am saving my program data in a file under: C:\Program Data\MyProgramName\fileName.xml
After installing and running my application one time I uninstalled it (during uninstallation I'm removing all the files from "program data")
and then I reinstall the application, and ran it.
The strange thig is that my application started as if the files in program data existed - means, I had old data in my app even though the data file was deleted.
When running:
File.Exists("C:\Program Data\MyProgramName\fileName.xml")
I got "true" even though I knew for sure that the file does not exist.
The thing became stranger when I ran the application as admin and then the file didn't exist.
After a research, I found out that when running my application with no admin priviliges instead of getting: "C:\Program Data\MyProgramName\fileName.xml" I get "C:\Users\userName\AppData\Local\VirtualStore\ProgramData\MyProgramName\fileName.xml"
and indeed there was a file that existed from the previous installation (that I obviously didn't delete ,because I didn't know it existed).
So apparentlly there is some virtual path to the file under program data.
EDIT :
I found out that after deleting the old file in the virtual store, my application is suddenly able to find the correct file. (I didn't make any changes in the file under Program Data.
My question is:
why is it happen.
How can I prevent it from happening
Thanks in advance
Do you actually have to write to the per-system Program Data folder instead of the per-user Application Data folder(s)?
You might want to take a look at Environment.GetFolderPath and the following Environment.SpecialFolders:
Environment.SpecialFolder.ApplicationData - data folder for application data, synchronized onto domain controller if the user profile is roaming
Environment.SpecialFolder.LocalApplicationData - data folder for application data, local and not synchronized (useful for, for instance, caches)
EDIT:
Tested on Windows 7 x64, non-administrator user.
var appData = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
var myFolder = Path.Combine(appData, "MyApp");
if(!Directory.Exists(myFolder)) Directory.CreateDirectory(myFolder);
File.WriteAllText(Path.Combine(myFolder, "Test.txt"), "Test.");
This does what is expected, ie. writes into C:\ProgramData\MyApp\Test.txt. As far as I can tell (Administrator mode Command Prompt), there's no UAC virtualization going on either.
Double edit:
I guess what's happened is that at some point an Administrator user has written the files into your ProgramData folder, and as such, UAC file system virtualization kicks in and redirects the non-administrator writes into the VirtualStore.
Does your uninstaller run as Administrator? If it does, you might have to check both the VirtualStore path for the user who initiates the uninstall, and the actual file system path for program data to remove. I'm not sure if there's an official way to do this, though...
I found the reason for the bug.
the application is trying to take ownership on the file and then the other file is created.
I removed that line and now everything works just fine.
I am getting below mention error in VS 2010. After getting this, Just restarting my machine and its working fine. But while hosting my application in windows server 2008 + IIS 7.0 its not working. Could you please suggest.
Error 107 Unable to copy file "C:\Inetpub\wwwroot\solution\Data.dll" to "bin\Debug\Data.dll". The process cannot access the file 'bin\Debug\Data.dll' because it is being used by another process.Services
Error 106 Unable to copy file "C:\Inetpub\wwwroot\source\Business.dll" to "bin\Debug\Business.dll". The process cannot access the file 'bin\Debug\Business.dll' because it is being used by another process.Services
You are compiling the application while it is running and IIS is using the DLLs.
The result is that the compiled DLLs cannot be copied because IIS is using them.
Reset IIS (or at least recycle the relevant application pool) before compiling.
You may want to reconsider setting the IIS web application folder to the project output folder.
Please check your Build Configurations under (VS2010) Build->Configuration Manager.
All projects should be in Debug or Release mode, and also check that the project Build check box is checked correctly.
Command prompt
copy source destination give full path of destination
copy C:\Inetpub\wwwroot\solution\Data.dll" "bin\Debug\Data.dll"
this is for copying file on the the same computer
I'm downloading from clickonce server new versions of files by my autoupdater. However, any time downloading cycle comes over MyApplication.exe.config file on the server webClient.DownloadFile(remoteFile, localFile) throws a System.Net.WebException with code 500 (internal server error or something like that). At the same time application event log renders few entries from asp.net, like
failed to initialize AppDomain /LM/W3SVC/1/ROOT
Exception: System.Configuration.ConfigurationErrorsException
asp.net process id doesn't have permission to access GAC
aspnet_wp.exe stoped.
But the cycle continues successfully for all other files.
Does it somehow figures that it is config file for a web server, since asp.net is .NET framework itself and "knows" about .config file?
As was already mentioned in the other answer, IIS will not serve .config files. Where my answer is different is the proposed work around: ClickOnce has an option to use .deploy files, where all your file names have a .deploy extension appended to them. This neatly gets around the IIS config transfer problem.
IIS, by default, does not serve up .config files. Do you have access to the IIS configuration on the ClickOnce server, so that you can see if .config is disallowed in the request filtering module?
In IIS 7, it's in Request Filtering in the IIS section. I'll see if I can find where that's configured in IIS 6.