cannot access a disposed object

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Ismail Mayat 4511 posts 10092 karma points MVP 2x admin c-trib

Dec 12, 2019 @ 09:22
0

Cannot access a disposed object
I have some code that was working with 8.00 and now i am on 8.3.0 and i am getting the following error:

Cannot access a disposed object.\r\nObject name: 'snapshot'.","ExceptionType":"System.ObjectDisposedException","StackTrace":"
at Umbraco.Web.PublishedCache.NuCache.ContentStore.Snapshot.Get(Int32 id) in D:\a\1\s\src\Umbraco.Web\PublishedCache\NuCache\ContentStore.cs:line 1480\r\n
at Umbraco.Web.PublishedCache.NuCache.ContentCache.GetById(Boolean preview, Int32 contentId) in D:\a\1\s\src\Umbraco.Web\PublishedCache\NuCache\ContentCache.cs:line 226\r\n

The code i question looks like:
```
public class RedirectPublishedContentFinder : IRedirectPublishedContentFinder
{
    private IPublishedContentCache  publishedCache { get; }

    public RedirectPublishedContentFinder(IPublishedContentCache publishedCache)
    {
        this.publishedCache = publishedCache;
    }

    public IPublishedContent Find(string url)
    {
        return publishedCache.GetByRoute(false,  new Uri(url).LocalPath.TrimEnd('/'), false);
    }
    public IPublishedContent Find(int id)
    {
        return publishedCache.GetById(false, id);
    }
    public IPublishedContent Find(Guid id)
    {
        return publishedCache.GetById(false, id);
    }
}
```
The error is happening on line return publishedCache.GetById(false, id);

Looks like something with nucache?
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Ismail Mayat 4511 posts 10092 karma points MVP 2x admin c-trib

Feb 21, 2020 @ 09:21

Ok thanks to callums pointer:

bool ignoreLocalDb = Boolean.Parse(ConfigurationManager.AppSettings["ignoreLocalDb"]);

        //only does this for prod with slots
        if (ignoreLocalDb)
        {
            //see https://github.com/umbraco/Umbraco-CMS/issues/5035#issuecomment-523581706 
            // its a workaround for azure slot swapping, without this code you end up with
            // locks on nucache and site will not boot until u restart it after slot deploy and swap
            composition.Register(factory => new PublishedSnapshotServiceOptions
            {
                IgnoreLocalDb = true
            });
        }

See the github comment for more info

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Søren Gregersen 441 posts 1884 karma points MVP 2x c-trib

Feb 21, 2020 @ 10:37
1
Callum would have done:
```
bool.TryParse(ConfigurationManager.AppSettings["ignoreLocalDb"], out var ignoreLocalDb);
```
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