Elasticsearch NEST - System.StackOverflowException when running Index

Question

When I run this code:

var result = _client.Index<EntityType>(item, i => i.Index(n));

I'm getting this error:

Exception has occurred: CLR/System.StackOverflowException An unhandled exception of type 'System.StackOverflowException' occurred in Elasticsearch.Net.dll

The full method:

public bool Index<EntityType>(EntityType item, int attempt = 0) where EntityType : class, IDomainEntity<int>
{
    const int maxRetries = 5;
    if (item == null)
    {
        return false;
    }
    var type = item.GetType();
    var attributes = type.CustomAttributes;
    string n = "";

    foreach (var attribute in attributes)
    {
        foreach (var arg in attribute.NamedArguments)
        {
            if (arg.MemberName == "RelationName")
            {
                n = arg.TypedValue.Value.ToString().ToLower();
            }
        }
    }

    var result = _client.Index<EntityType>(item, i => i.Index(n));
    if (!CheckResponse(result) && attempt < maxRetries)
    {
        RefreshClient<EntityType>();
        attempt++;
        return Index(item, attempt);
    }
    RefreshClient<EntityType>();
    return result.IsValid;
}

Ah sorry, I missed that (late late night :)) Do you have a complete reproducible example that can be shared (here or as a gist)? — Russ Cam, May 19 '21 at 23:10
@RussCam I actually think it might be the same as your [other answer](https://stackoverflow.com/a/51851703/3935156), I had linked that in my question before realising you had answered it. — BeniaminoBaggins, May 20 '21 at 06:54
@RussCam Do you see any way to apply that answer to my code? I have added the full method into the question now. It’s a generic method as it can index any type. — BeniaminoBaggins, May 20 '21 at 17:55
Do you have a constructed instance of a type with which to run the method that you can share? e.g. `var item = new GroceryItem( /* fully hydrated model */);` — Russ Cam, May 21 '21 at 07:14
@RussCam I have just added it to the bottom of the question. Take note of the blurb of text above it, explaining it must be an infinite loop — BeniaminoBaggins, May 21 '21 at 07:49

BeniaminoBaggins · Accepted Answer · 2021-05-26T02:06:27.777

1

I added [PropertyName("propertyToIgnoreInElasticsearch", Ignore = true)] from NEST to my POCO fields which were causing an infinite loop while Indexing. It ignores a field from the Elasticsearch Index so it is not indexed.

for example:

[Serializable]
public abstract class VeganItem<VeganItemEstablishmentType>
{
    [Required]
    public string Name { get; set; }

    [PropertyName("veganItemEstablishments", Ignore = true)]
    public virtual ICollection<VeganItemEstablishmentType> VeganItemEstablishments { get; set; }
}

edited May 26 '21 at 02:06

answered May 21 '21 at 20:55

BeniaminoBaggins

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I'm glad to see you got it sorted. In general, it's better to create specific POCOs for interacting with Elasticsearch. Complex objects such as those used with ORMs like Entity Framework and NHibernate that can include lazily loaded entities and self-referencing loops can cause problems when serializing to JSON, to send to Elasticsearch – Russ Cam May 26 '21 at 07:54

Elasticsearch NEST - System.StackOverflowException when running Index

1 Answers1