Databases
StackOverflow2013
Postsdbo
POQuerying Active Directory from MVC result in: Attempted to access an unloaded appdomain. (Exception from HRESULT: 0x80131014)
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POQuerying Active Directory from MVC result in: Attempted to access an unloaded appdomain. (Exception from HRESULT: 0x80131014)
    text
    copied!<p>I have an issue using c# on .Net 4 in a MVC web application, where when I query Active Directory, I <em>frequently</em> get an error: <strong><em>Attempted to access an unloaded appdomain. (Exception from HRESULT: 0x80131014).</em></strong></p> <p>The strange thing is, that it will work flawlessly for a time, and then it will just start happening, and then just disappear again.</p> <p>I have made a few modifications to the function to get it to work , but they all seem to fail. I am wondering if I am doing something wrong, or if there is a better way to do it.</p> <p>Here is my current function, that will accept a loginId, and a PrincipalContext. The loginId can either be the user DisplayName <em>i.e "John Smith"</em>, or <em>DOMAINNAME\josmi</em>. The default is to use the first 2 letters of their firstname, and then the first 3 letters of their surname. There is a check in there if this is not the case. This part if fine.</p> <pre><code>public List&lt;ADGroup&gt; GetMemberGroups(string loginId, PrincipalContext principalContext, int tries = 0) { var result = new List&lt;ADGroup&gt;(); try { var samAccountName = ""; if (loginId.Contains(" ")) { var fName = loginId.Split(Char.Parse(" "))[0].ToLower(); var sName = loginId.Split(Char.Parse(" "))[1].ToLower(); if (sName.Trim().Length == 2) samAccountName = string.Format("{0}{1}", fName.StartsWith(".") ? fName.Substring(0, 4) : fName.Substring(0, 3), sName.Substring(0, 2)); else samAccountName = string.Format("{0}{1}", fName.StartsWith(".") ? fName.Substring(0, 3) : fName.Substring(0, 2), sName.Substring(0, 3)); } else samAccountName = loginId.Substring(loginId.IndexOf(@"\") + 1); var authPrincipal = UserPrincipal.FindByIdentity(principalContext, IdentityType.SamAccountName, samAccountName); if (authPrincipal == null) throw new Exception(string.Format("authPrincipal is null for loginId - {0}", loginId)); var firstLevelGroups = authPrincipal.GetGroups(); AddGroups(firstLevelGroups, ref result); } catch { if (tries &gt; 5) throw; tries += 1; System.Threading.Thread.Sleep(1000); GetMemberGroups(loginId, principalContext, tries); } return result; } private void AddGroups(PrincipalSearchResult&lt;Principal&gt; principal, ref List&lt;ADGroup&gt; returnList) { foreach (var item in principal) { if (item.GetGroups().Count() &gt; 0) AddGroups(item.GetGroups(), ref returnList); returnList.Add(new ADGroup(item.SamAccountName, item.Sid.Value)); } } </code></pre> <p>This function is called like this:</p> <pre><code>MembershipGroups = ad.GetMemberGroups(user.SamAccountName, new PrincipalContext(ContextType.Domain)); </code></pre> <p>The the error that I <em>SOMETIMES</em> get is: </p> <blockquote> <p>System.AppDomainUnloadedException: Attempted to access an unloaded appdomain. (Exception from HRESULT: 0x80131014) at System.StubHelpers.StubHelpers.InternalGetCOMHRExceptionObject(Int32 hr, IntPtr pCPCMD, Object pThis) at System.StubHelpers.StubHelpers.GetCOMHRExceptionObject(Int32 hr, IntPtr pCPCMD, Object pThis) at System.DirectoryServices.AccountManagement.UnsafeNativeMethods.IADsPathname.Retrieve(Int32 lnFormatType) at System.DirectoryServices.AccountManagement.ADStoreCtx.LoadDomainInfo() at System.DirectoryServices.AccountManagement.ADStoreCtx.get_UserSuppliedServerName() at System.DirectoryServices.AccountManagement.ADDNLinkedAttrSet.BuildPathFromDN(String dn) at System.DirectoryServices.AccountManagement.ADDNLinkedAttrSet.MoveNextPrimaryGroupDN() at System.DirectoryServices.AccountManagement.ADDNLinkedAttrSet.MoveNext() at System.DirectoryServices.AccountManagement.FindResultEnumerator<code>1.MoveNext() at System.DirectoryServices.AccountManagement.FindResultEnumerator</code>1.System.Collections.IEnumerator.MoveNext()</p> </blockquote>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload