Network connection lost with large D1 Import

[mrxbox98]

What versions & operating system are you using?

System:
OS: Windows 11 10.0.26200
CPU: (24) x64 AMD Ryzen AI 9 HX 370 w/ Radeon 890M
Memory: 7.48 GB / 31.12 GB
Binaries:
Node: 24.9.0 - C:\nvm4w\nodejs\node.EXE
Yarn: 1.22.22 - C:\nvm4w\nodejs\yarn.CMD
npm: 11.6.0 - C:\nvm4w\nodejs\npm.CMD
pnpm: 10.28.0 - C:\nvm4w\nodejs\pnpm.CMD
bun: 1.3.1 - C:\Users\userdir.bun\bin\bun.EXE

Please provide a link to a minimal reproduction

https://github.com/mrxbox98/cf-debug/blob/main/db-big.sql

Describe the Bug

Attempting to import a large sql file fails as the network connection is lost midway through.

Reproduce by attempting to remotely execute the file

Please provide any relevant error logs

🌀 File already uploaded. Processing.
🌀 Starting import...
🌀 Processed 1477 queries.
🌀 Processed 3014 queries.
🌀 Processed 11054 queries.
🌀 Processed 28615 queries.
🌀 Processed 46336 queries.
🌀 Processed 59539 queries.
🌀 Processed 62976 queries.
🌀 Processed 68746 queries.
🌀 Processed 74765 queries.
🌀 Processed 85823 queries.
🌀 Processed 96763 queries.
🌀 Processed 97589 queries.
🌀 Processed 98360 queries.
🌀 Processed 99191 queries.
🌀 Processed 100017 queries.
🌀 Processed 100833 queries.

✘ [ERROR] Network connection lost.

[edmundhung]

I did some testing with your reproduction file. The upload works, but I hit a different failure ("fetch failed" timeout) rather than your "Network connection lost" during processing. Could you share your wrangler version (wrangler --version) and exact command?

To workaround this, you can split the SQL into smaller chunks (~50k lines) and import sequentially.

[mrxbox98]

My version:

 ⛅️ wrangler 4.59.2 (update available 4.59.3)
─────────────────────────────────────────────

The command was yarn run wrangler d1 execute d1-db-name --file .\db-big.sql --remote