bitcoind RPC Errors

[casey]

We're running into two distinct bitcoind RPC errors:

1. JsonRpc(Transport(SocketError(Error { kind: TimedOut, message: "connection timed out" }))) hereafter "timeout"
2. JsonRpc(Transport(SocketError(Os { code: 35, kind: WouldBlock, message: "Resource temporarily unavailable" }))) hereafter "resource unavailable"

timeout

I took this as far as I could, came up with a self-contained repro, and opened this issue: apoelstra/rust-jsonrpc#67

resource unavailable

• Create self-contained reproduction
• Does the binary matter?
• Questions in MacOS: importdescriptors RPC call very slow with release and source-built binaries, but fast for homebrew binaries bitcoin/bitcoin#25724 (comment)

---

This might be a bug in rust-jsonrpc, or rust-bitcoincorerpc. Some things to try:

• try +SO_REUSEADDR, +SO_REUSEPORT, and -SO_LINGER
• try changing 15s default timeout to see if I can get a different timeout
• try figuring out why the timeout is always 15s
• try implementing hyper transport (can upstream behind a feature flag)
• remove com.apple.quarantine from bitcoind (or add to homebrew)
• try eliminating Rust RPC from repro

[casey]

Closing in favor of more specific issues.