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s3cmd: put fails with “Connection reset by peer” for large files

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s3cmd: put fails with “Connection reset by peer” for large files

· DevOps Zone
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In response to accelerated release cycles, a new set of testing capabilities is now required to deliver quality at speed. This is why there is a shake-up in the testing tools landscape—and a new leader has emerged in the just released Gartner Magic Quadrant for Software Test Automation.

I recently wanted to copy some large files from an AWS instance into an S3 bucket using s3cmd but ended up with the following error when trying to use the ‘put’ command:

$ s3cmd put /mnt/ebs/myfile.tar s3://mybucket.somewhere.com
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [1 of 1]
     1077248 of 12185313280     0% in    1s   937.09 kB/s  failed
WARNING: Upload failed: /myfile.tar ([Errno 104] Connection reset by peer)
WARNING: Retrying on lower speed (throttle=0.00)
WARNING: Waiting 3 sec...
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [1 of 1]
     1183744 of 12185313280     0% in    1s  1062.18 kB/s  failed
WARNING: Upload failed: /myfile.tar ([Errno 104] Connection reset by peer)
WARNING: Retrying on lower speed (throttle=0.01)
WARNING: Waiting 6 sec...
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [1 of 1]
      417792 of 12185313280     0% in    1s   378.75 kB/s  failed
WARNING: Upload failed: /myfile.tar ([Errno 104] Connection reset by peer)
WARNING: Retrying on lower speed (throttle=0.05)
WARNING: Waiting 9 sec...
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [1 of 1]
       94208 of 12185313280     0% in    1s    81.04 kB/s  failed
WARNING: Upload failed: /myfile.tar ([Errno 32] Broken pipe)
WARNING: Retrying on lower speed (throttle=0.25)
WARNING: Waiting 12 sec...
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [1 of 1]
       28672 of 12185313280     0% in    1s    18.40 kB/s  failed
WARNING: Upload failed: /myfile.tar ([Errno 32] Broken pipe)
WARNING: Retrying on lower speed (throttle=1.25)
WARNING: Waiting 15 sec...
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [1 of 1]
       12288 of 12185313280     0% in    2s     4.41 kB/s  failed
ERROR: Upload of '/mnt/ebs/myfile.tar' failed too many times. Skipping that file.

I tried with a smaller file just to make sure I wasn’t doing anything stupid syntax wise and that transferred without a problem which lead me to believe the problem might be when uploading larger files – the one I was uploading was around ~10GB in size.

I eventually came across this StackOverflow thread which suggested that files >5GB in size need to make use of the ‘multi part method’ which was released in version 1.1.0 of s3cmd.

The Ubuntu repository comes with version 1.0.0 so I needed to find a way of getting a newer version onto the machine.

I eventually ended up downloading version 1.5.0 from sourceforge but I couldn’t get a direct URI to download it so I ended up downloading it to my machine, uploading to the S3 bucket through the web UI and then pulling it back down again using a ‘s3cmd get’. #epic

In retrospect the s3cmd PPA might have been a better option.

Anyway, when I used this s3cmd it uploaded using multi part fine:

...
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [part 761 of 775, 15MB]
 15728640 of 15728640   100% in    3s     4.12 MB/s  done
/mnt/ebs/myfile.tar -> s3://mybucket.somewhere.com/myfile.tar  [part 762 of 775, 15MB]
...

Recently published 5th annual Software Fail Watch Report identified 606 recorded software fails impacting half of the world’s population (3.7 billion people), $1.7 trillion in assets, and 314 companies. Our advice: Rethink your testing strategies and approach to quality so they’re not finding it in your next release.

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