{"action":"opened","issue":{"url":"https://api.github.com/repos/dotnet/coreclr/issues/2881","labels_url":"https://api.github.com/repos/dotnet/coreclr/issues/2881/labels{/name}","comments_url":"https://api.github.com/repos/dotnet/coreclr/issues/2881/comments","events_url":"https://api.github.com/repos/dotnet/coreclr/issues/2881/events","html_url":"https://github.com/dotnet/coreclr/issues/2881","id":129204664,"number":2881,"title":"Fix race in Default LoadContext initialization","user":{"login":"gkhanna79","id":9451457,"avatar_url":"https://avatars.githubusercontent.com/u/9451457?v=3","gravatar_id":"","url":"https://api.github.com/users/gkhanna79","html_url":"https://github.com/gkhanna79","followers_url":"https://api.github.com/users/gkhanna79/followers","following_url":"https://api.github.com/users/gkhanna79/following{/other_user}","gists_url":"https://api.github.com/users/gkhanna79/gists{/gist_id}","starred_url":"https://api.github.com/users/gkhanna79/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkhanna79/subscriptions","organizations_url":"https://api.github.com/users/gkhanna79/orgs","repos_url":"https://api.github.com/users/gkhanna79/repos","events_url":"https://api.github.com/users/gkhanna79/events{/privacy}","received_events_url":"https://api.github.com/users/gkhanna79/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/dotnet/coreclr/labels/bug","name":"bug","color":"fc2929"}],"state":"open","locked":false,"assignee":{"login":"gkhanna79","id":9451457,"avatar_url":"https://avatars.githubusercontent.com/u/9451457?v=3","gravatar_id":"","url":"https://api.github.com/users/gkhanna79","html_url":"https://github.com/gkhanna79","followers_url":"https://api.github.com/users/gkhanna79/followers","following_url":"https://api.github.com/users/gkhanna79/following{/other_user}","gists_url":"https://api.github.com/users/gkhanna79/gists{/gist_id}","starred_url":"https://api.github.com/users/gkhanna79/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gkhanna79/subscriptions","organizations_url":"https://api.github.com/users/gkhanna79/orgs","repos_url":"https://api.github.com/users/gkhanna79/repos","events_url":"https://api.github.com/users/gkhanna79/events{/privacy}","received_events_url":"https://api.github.com/users/gkhanna79/received_events","type":"User","site_admin":false},"milestone":{"url":"https://api.github.com/repos/dotnet/coreclr/milestones/6","html_url":"https://github.com/dotnet/coreclr/milestones/1.0.0-rc2%20","labels_url":"https://api.github.com/repos/dotnet/coreclr/milestones/6/labels","id":1380513,"number":6,"title":"1.0.0-rc2 ","description":"","creator":{"login":"tzwlai","id":9966807,"avatar_url":"https://avatars.githubusercontent.com/u/9966807?v=3","gravatar_id":"","url":"https://api.github.com/users/tzwlai","html_url":"https://github.com/tzwlai","followers_url":"https://api.github.com/users/tzwlai/followers","following_url":"https://api.github.com/users/tzwlai/following{/other_user}","gists_url":"https://api.github.com/users/tzwlai/gists{/gist_id}","starred_url":"https://api.github.com/users/tzwlai/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tzwlai/subscriptions","organizations_url":"https://api.github.com/users/tzwlai/orgs","repos_url":"https://api.github.com/users/tzwlai/repos","events_url":"https://api.github.com/users/tzwlai/events{/privacy}","received_events_url":"https://api.github.com/users/tzwlai/received_events","type":"User","site_admin":false},"open_issues":53,"closed_issues":125,"state":"open","created_at":"2015-10-27T22:42:35Z","updated_at":"2016-01-27T16:53:29Z","due_on":"2016-02-02T08:00:00Z","closed_at":null},"comments":0,"created_at":"2016-01-27T16:53:29Z","updated_at":"2016-01-27T16:53:29Z","closed_at":null,"body":"When multiple threads attempt to fetch the Default property off AssemblyLoadContext, there can be a race where the native TPA Binder mapping gets mapped to a different instance than the one that mapped to it first.\r\n\r\nAs a result, Resolving event notifications could go to incorrect Default LoadContext instances. \r\n\r\nWe should only ever have a single Default ALC instance and TPA binder should only be mapped to it."}}