Connections to faucet are not closed. Out of file descriptors after long run.

[etam]

Yagna version: https://github.com/golemfactory/yagna/tree/pre-rel-v0.4.1-fix-738 (50eda9e). It's basically 0.4.1 with some unrelated changes.

Steps to reproduce:

• run yagna service
• every 5 minutes call yagna payment init -r and request some computation

Result:
lsof -i -a -p <pid of yagna> -n -P | grep ":4000 (CLOSE_WAIT)" | wc -l reports a number growing over time.

[etam]

after restart:

[...]
Nov 04 09:06:43 testnet-checker yagna[12499]: [2020-11-04T09:06:43Z INFO  ya_gnt_driver::gnt::sender] tx_hash=0xfd232599bba0f790e78ac76987b50b76130501da7042048e79bf066400c773f9, confirmations=27533
Nov 04 09:06:43 testnet-checker yagna[12499]: [2020-11-04T09:06:43Z INFO  ya_gnt_driver::gnt::sender] tx_hash=0x6beff1bc59a5d66731d9373b035ec81bd533285191b111922c6cb0aa14dcd601, confirmations=27533
Nov 04 09:06:43 testnet-checker yagna[12499]: [2020-11-04T09:06:43Z INFO  ya_gnt_driver::gnt::sender] tx_hash=0x18e73dff5350626b325b3d3254be0436395365d64fee28c18e0bcb6f23b4bdaa, confirmations=27533
Nov 04 09:06:44 testnet-checker yagna[12499]: [2020-11-04T09:06:44Z INFO  ya_gnt_driver::gnt] Notify payment: NotifyPayment { driver: "ngnt", amount: BigDecimal("0.06429042712555555"), sender: "0x324a880f4b4335543577e24b9d97b4d19cb6cec7", recipient: "0xf2bfe6456302c3667a
Nov 04 09:06:44 testnet-checker yagna[12499]: [2020-11-04T09:06:44Z INFO  ya_gnt_driver::gnt] Notify payment: NotifyPayment { driver: "ngnt", amount: BigDecimal("0.08015251312833332"), sender: "0x324a880f4b4335543577e24b9d97b4d19cb6cec7", recipient: "0x4c855a4bfb29ae37f2
Nov 04 09:06:44 testnet-checker yagna[12499]: thread 'main' panicked at 'assertion failed: `(left != right)`
Nov 04 09:06:44 testnet-checker yagna[12499]:   left: `0`,
Nov 04 09:06:44 testnet-checker yagna[12499]:  right: `0`', core/payment-driver/gnt/src/gnt/sender.rs:952:5
Nov 04 09:06:44 testnet-checker yagna[12499]: note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[tworec]

I the past we've dealt with such errors by reusing awc.