Why await not waiting?

Question

I was confronted with unexpected and strange behavior when working with async/await methods. Execution is breaking after calling await. There is no exceptions or async continue, just break and nothing. Here is code:

public async Task<IEnumerable<MailChimpUser>> GetAllMembersAsync(string listName) { try { //Breaks here var list = await GetListByName(listName); //Nevertheless, if extract method code //var lists = await _apiManager.Lists.GetAllAsync().ConfigureAwait(false); //list = lists.FirstOrDefault(l => l.Name == name); //the execution will continueя var members = await _apiManager.Members.GetAllAsync(list.Id).ConfigureAwait(false); var result = members.Select(m => new MailChimpUser() { ... } ); //the same behavior here, after the return it does not return to the method that awaiting it. return result; } catch (Exception ex) { var logger = LogManager.GetCurrentClassLogger(); logger.Error(ex, ex.Message, new object[] { }); throw ex; } } private async Task<MailChimp.Net.Models.List> GetListByName(string name) { try { var lists = await _apiManager.Lists.GetAllAsync().ConfigureAwait(false); var list = lists.FirstOrDefault(l => l.Name == name); if (list == null) throw new Exception(String.Format("MailChimp: List \"{0}\" not found", name)); return list; } catch (Exception ex) { var logger = LogManager.GetCurrentClassLogger(); logger.Error(ex, ex.Message, new object[] { }); throw ex; } }

Can you tell me what I'm doing wrong and how can I fix it?

@UweKeim not if they explicitly wants to reset the stack trace — David Pilkington
– David Pilkington, Commented Sep 20, 2017 at 9:38
What do you mean exactly by "break"? I can't see where you call GetAllMembersAsync, only GetAllAsync. — René Vogt
– René Vogt, Commented Sep 20, 2017 at 9:38
Please show how you call the methods. If you don't await those methods or try to access the Result of the returned Tasks, you may miss an exceptions thrown by GetListByName. — René Vogt
– René Vogt, Commented Sep 20, 2017 at 9:56
We still can't see the whole callstack. But do read Using ConfigureAwait(false) to avoid deadlocks is a dangerous practice — Henk Holterman
– Henk Holterman, Commented Sep 20, 2017 at 11:15

Николай Солдаткин · Accepted Answer · 2017-09-20 10:42:23Z

1

The problem was that I forgot ConfigureAwait(false)

var list = await GetListByName(listName).ConfigureAwait(false);

answered Sep 20, 2017 at 10:42

Николай Солдаткин

3281 gold badge3 silver badges12 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Why await not waiting?

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related