{"action":"created","comment":{"url":"https://api.github.com/repos/dotnet/corefx/pulls/comments/192570448","pull_request_review_id":125376885,"id":192570448,"node_id":"MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDE5MjU3MDQ0OA==","diff_hunk":"@@ -47,19 +47,26 @@ public static X509Certificate2Collection GetClientCertificateCollection()\n \n             private static X509Certificate2 GetCertificate(string certificateFileName)\n             {\n+                // Use a unique path for each load to avoid concurrency issue in the OS\n+                // when loading the same certificate from multiple threads.\n+                string tmpPath = Path.GetTempFileName();\n                 try\n                 {\n-                    var cert = new X509Certificate2(\n-                        Path.Combine(TestDataFolder, certificateFileName),\n+                    File.Copy(Path.Combine(TestDataFolder, certificateFileName), tmpPath, overwrite: true);\n+                    return new X509Certificate2(\n+                        tmpPath,\n                         CertificatePassword,\n                         X509KeyStorageFlags.DefaultKeySet);\n-                    return cert;\n                 }\n                 catch (Exception ex)\n                 {\n                     Debug.Fail(nameof(Configuration.Certificates.GetCertificate) + \" threw \" + ex.ToString());\n                     throw;\n                 }\n+                finally\n+                {\n+                    try { File.Delete(tmpPath); } catch { }","path":"src/Common/tests/System/Net/Configuration.Certificates.cs","position":25,"original_position":25,"commit_id":"70bc6e992ef49f40738b983e26329d710a70a035","original_commit_id":"70bc6e992ef49f40738b983e26329d710a70a035","user":{"login":"stephentoub","id":2642209,"node_id":"MDQ6VXNlcjI2NDIyMDk=","avatar_url":"https://avatars0.githubusercontent.com/u/2642209?v=4","gravatar_id":"","url":"https://api.github.com/users/stephentoub","html_url":"https://github.com/stephentoub","followers_url":"https://api.github.com/users/stephentoub/followers","following_url":"https://api.github.com/users/stephentoub/following{/other_user}","gists_url":"https://api.github.com/users/stephentoub/gists{/gist_id}","starred_url":"https://api.github.com/users/stephentoub/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/stephentoub/subscriptions","organizations_url":"https://api.github.com/users/stephentoub/orgs","repos_url":"https://api.github.com/users/stephentoub/repos","events_url":"https://api.github.com/users/stephentoub/events{/privacy}","received_events_url":"https://api.github.com/users/stephentoub/received_events","type":"User","site_admin":false},"body":"Because I didn't know those ctors were equivalent :)","created_at":"2018-06-02T21:04:59Z","updated_at":"2018-06-02T21:05:00Z","html_url":"https://github.com/dotnet/corefx/pull/30090#discussion_r192570448","pull_request_url":"https://api.github.com/repos/dotnet/corefx/pulls/30090","author_association":"MEMBER","_links":{"self":{"href":"https://api.github.com/repos/dotnet/corefx/pulls/comments/192570448"},"html":{"href":"https://github.com/dotnet/corefx/pull/30090#discussion_r192570448"},"pull_request":{"href":"https://api.github.com/repos/dotnet/corefx/pulls/30090"}},"in_reply_to_id":192568574},"pull_request":{"url":"https://api.github.com/repos/dotnet/corefx/pulls/30090","id":192213301,"node_id":"MDExOlB1bGxSZXF1ZXN0MTkyMjEzMzAx","html_url":"https://github.com/dotnet/corefx/pull/30090","diff_url":"https://github.com/dotnet/corefx/pull/30090.diff","patch_url":"https://github.com/dotnet/corefx/pull/30090.patch","issue_url":"https://api.github.com/repos/dotnet/corefx/issues/30090","number":30090,"state":"open","locked":false,"title":"Attempt to fix crashes due to shared test certificates","user":{"login":"stephentoub","id":2642209,"node_id":"MDQ6VXNlcjI2NDIyMDk=","avatar_url":"https://avatars0.githubusercontent.com/u/2642209?v=4","gravatar_id":"","url":"https://api.github.com/users/stephentoub","html_url":"https://github.com/stephentoub","followers_url":"https://api.github.com/users/stephentoub/followers","following_url":"https://api.github.com/users/stephentoub/following{/other_user}","gists_url":"https://api.github.com/users/stephentoub/gists{/gist_id}","starred_url":"https://api.github.com/users/stephentoub/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/stephentoub/subscriptions","organizations_url":"https://api.github.com/users/stephentoub/orgs","repos_url":"https://api.github.com/users/stephentoub/repos","events_url":"https://api.github.com/users/stephentoub/events{/privacy}","received_events_url":"https://api.github.com/users/stephentoub/received_events","type":"User","site_admin":false},"body":"We've been seeing some crashes in tests due to what is believed to be an OS bug related to concurrently loading the same certificate from multiple threads.  In case it's to do with the file path instead of the actual contents of the cert, this uses a unique path for each load.\r\n\r\nMaybe fixes https://github.com/dotnet/corefx/issues/30044 and https://github.com/dotnet/corefx/issues/30028?  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