[Bug]: issue with SSH proxy timeouts preventing lrge file transfers

[cwen11]

Bug Description

The SSH proxy in libhoop has aggressive timeouts that cause large file transfers to fail. The proxy's write queue cannot keep up with normal SSH transfer speeds, resulting in timeout errors.

Impact

• Cannot transfer files larger than a few MB using rsync or scp
• Transfers fail with "exit status 12" after ~4MB
• Users must artificially limit bandwidth (--bwlimit=1000) to work around the issue
• Significantly degrades user experience and transfer performance

Steps to Reproduce

1. Open a Native Client session to a SSH resource
2. Attempt to rsync a large file (ex: 5GB)
3. Fails

Expected Behavior

I would've expected it to succeed.

Actual Behavior

It failed, with logs in the agent like:

Mar 18 18:52:02 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:02-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:04 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:04-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:06 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:06-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:08 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:08-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:10 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:10-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:12 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:12-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:14 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:14-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:16 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:16-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}
Mar 18 18:52:18 U-999-Device01-Jump.localdomain hoop-agent[499098]: {"level":"warn","timestamp":"2026-03-18T18:52:18-04:00","logger":"ssh/proxy.go:275","msg":"timeout sending ssh data to channel","conn":"11069","ch":1}

Version

1.49.10

Browser(s)

Other

Operating System

macOS Tahoe (but the resource is Linux RHEL 8)

Screenshots

No response

Additional Context

No response

Relevant Log Output

Code of Conduct

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