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ITNETSYS's avatar
ITNETSYS
Explorer | Level 3
6 years ago

Frequent Timeouts (>4.5 minutes) during files_upload_session_append_v2

Hi, I'm uploading larger files (up to 9.3 GiB) in 4 MiB chunks via the dropbox python library in an Azure function. In the last few months they started failing very frequently because on some chu...
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Greg-DB's avatar
Greg-DB
Icon for Dropbox Community Moderator rankDropbox Community Moderator
6 years ago

Thanks for the report! I'm not aware of anything that should be causing this, but we'll be happy to look into this. To help us investigate, please share the following:

  • the version number of Python you're using
  • the version number of the Dropbox Python SDK you're using
  • an estimate of the percent of these calls that fail
  • the full error output for a failed call
  • the output of a traceroute or tracert to content.dropboxapi.com from an affected machine
ITNETSYS's avatar
ITNETSYS
Explorer | Level 3
6 years ago

Hi Greg,

 

Thanks for replying.
Python version: 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:54:40) [MSC v.1900 64 bit (AMD64)]
Dropbox SDK version: 8.8.1

 

On the last 2330 calls I got 15 timeouts, so based on this limited data about 0.7% failure rate

 

I'm calling DBX.files_upload_session_append_v2(chunk, cursor) and I'll get a requests Timeout exception on a random chunk during that call.


Appaerently Azure web app service intances block ICMP. So I can't use Ping and Tracert, but here is a tcpping result:

PS D:\home> tcpping content.dropboxapi.com
tcpping content.dropboxapi.com
Connected to content.dropboxapi.com:80, time taken: 78ms
Connected to content.dropboxapi.com:80, time taken: 49ms
Connected to content.dropboxapi.com:80, time taken: <1ms
Connected to content.dropboxapi.com:80, time taken: 10ms
Complete: 4/4 successful attempts (100% ). Average success time: 34.25ms

 

  • Greg-DB's avatar
    Greg-DB
    Icon for Dropbox Community Moderator rankDropbox Community Moderator
    6 years ago

    Thanks for following up. Can you share the actual error output though? The particular error type and stack trace may be helpful. Thanks in advance! 

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