Dropbox .Net API UploadSessionStartAsync throwing httpclient timeout exception all of the sudden

[rororo12]

Hello, 

Our app all of the sudden is getting the following exception when trying to call UploadSessionStartAsync like so:
var result = await DropboxClientInstance.Files.UploadSessionStartAsync(body: memStream, uploadSessionStartArg:new UploadSessionStartArg());

Here is the exception:

The request was canceled due to the configured HttpClient.Timeout of 300 seconds elapsing.

The timeout was originally 100ms and I thought maybe there's some network lag so I increased the httpclient timeout to 5 mins (or 300 seconds) when initializing the Dropbox Client like so like so:

var dbxConfig = new DropboxClientConfig();
dbxConfig.HttpClient = new HttpClient();
dbxConfig.HttpClient.Timeout = new TimeSpan(0, 5, 0); //setting httpclient timeout to 5 mins or 300 seconds

var tokenResult = await DropboxOAuth2Helper.ProcessCodeFlowAsync(code: input, appKey: dbxAppKey, appSecret: dbxAppSecretKey, redirectUri: null);

DropboxClientInstance = new DropboxClient(appKey: dbxAppKey,
appSecret: dbxAppSecretKey,
oauth2AccessToken: tokenResult.AccessToken,
oauth2RefreshToken: tokenResult.RefreshToken,
oauth2AccessTokenExpiresAt: tokenResult.ExpiresAt.Value, config: dbxConfig);

I'm using V7 of the .net library 

Anyone know why all of the sudden I would be getting an httpclient timeout when it was working fine for months without an issue?

Thanks in advance for the help!

[Здравко]

Hi @rororo12,

Can you perform arbitrary HTTP request to Dropbox server using so configured HttpClient in your code? It sounds like you have some platform issues likely came up recently; check this. Make sure you have working network connection able to perform HTTP request that successfully roots to Dropbox server in your application.

Good luck.

[Greg-DB · Accepted solution]

@rororo12 Like Здравко recommended, I suggest troubleshooting your environment to see if there's anything wrong with your network connection that would be interfering with the network requests to the Dropbox API servers. (For example, is there any proxy, firewall, etc. that may be causing an issue?) I'm not aware of an issue that should be preventing these calls from completing. I just tried out your code using v7.0.0 of the Dropbox .NET SDK and it ran successfully for me.

[rororo12]

Hi Greg and Здравко ,  a hard cycle of the server solved the problem but it's still a super strange issue because the server hadn't been touched for months and all the other apps running on it were able to communicate with the internet without a problem.  Who knows but thanks for the tip, sometimes it's just something as stupid as a reboot I guess haha.