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Nondeterministic connection breaking on AWS #9

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mcopik opened this issue Feb 16, 2023 · 0 comments
Open
2 tasks

Nondeterministic connection breaking on AWS #9

mcopik opened this issue Feb 16, 2023 · 0 comments
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bug Something isn't working help wanted Extra attention is needed

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@mcopik
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mcopik commented Feb 16, 2023

We experienced that TCP connections created with TCPunch can randomly fail on AWS. So far, we have not found the primary issue - the observed behavior that a TCP message is suddenly lost after exchanging 16 - 64 kB of data between peers. The data is sent, as verified by the Wireshark analysis, but the receiver keeps retrying for a TCP packet that never arrives. We have been able to reproduce the issue between two VMs as well.

So far, we have implemented a workaround that attempts to exchange 64 kB between two peers and restarts the pairing process.

  • Can we still reproduce the problem?
  • Can changing the default packet size influence the problem?
@mcopik mcopik added bug Something isn't working help wanted Extra attention is needed labels Feb 16, 2023
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