Can't connect to LDAP Server on Linux

Describe the bug I am able to connect to LDAP Server in the wndows but through docker container when I am using Linux Platform I am getting this error stating that Can’t connect to LDAP Server.

LdapForNet.LdapException: Can't contact LDAP server. Result: -1.

To Reproduce It can be reproduced when we write a Dockerfile in linux environment.

Expected behavior Make it cross-platform compatible Desktop (please complete the following information):

• OS: Linux
• Library version: 2.7.11
• .NET\core\mono version- 3.1
• LDAP server: Active Directory

Additional context I have tried to install the necessary libraries for LDAP as well for linux.

apt-get update && apt-get install -y ldap-utils krb5-kdc-ldap libsasl2-2 libsasl2-modules sasl2-bin libsasl2-modules-ldap openssl

Let me know if I am missing on anything. Thanks a lot in advance.

[BalassaMarton]

I’m having a very similar problem on Linux (RHEL7) when trying to reuse connections. Everything is fine if I’m disposing every LdapConnection after using it. However, when pooling the connection, after a few requests I get the same exception when sending a SearchRequest: Can’t contact LDAP server. Result: -1. Method: SearchRequest. Is it possible that it is a memory leak in LdapForNet or OpenLDAP after all? To verify this, I tried using the same connection for every request, using a semaphore to make sure they are not run in parallel. I also did a full GC and logged the total process memory (Process.GetCurrentProcess().WorkingSet64) before and after each usage of the connection. Memory usage grows dramatically during the first few requests, and after that all requests fail with above error.

[AbhilashKopalli]

Hi @flamencist,

I have retried if it fails for the pagination and now I am encountering OutofMemory Exception. Is there any memory leak going on anywhere, the total records is 11000 and my pod memory size is 256MB. Any idea why this is happening?

System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown. at System.Collections.Generic.Dictionary2.Resize(Int32 newSize, Boolean forceNewHashCodes) at System.Collections.Generic.Dictionary2.TryInsert(TKey key, TValue value, InsertionBehavior behavior) at System.Collections.ObjectModel.KeyedCollection2.AddKey(TKey key, TItem item) at LdapForNet.RequestHandlers.SearchRequestHandler.GetLdapAttributes(SafeHandle ld, IntPtr entry, IntPtr& ber) at LdapForNet.RequestHandlers.SearchRequestHandler.GetLdapEntries(SafeHandle ld, IntPtr msg, IntPtr ber)+MoveNext() at System.Collections.Generic.List1..ctor(IEnumerable1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source) at LdapForNet.RequestHandlers.SearchRequestHandler.Handle(SafeHandle handle, LdapResultType resType, IntPtr msg, DirectoryResponse& response) at LdapForNet.LdapConnection.ProcessResponse(DirectoryRequest directoryRequest, RequestHandler requestHandler, Int32 messageId, CancellationToken token) at LdapForNet.LdapConnection.<>c__DisplayClass24_0.<SendRequestAsync>b__0() at System.Threading.Tasks.Task1.InnerInvoke() at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) `