Weird torrent delay when add and remove fast.

[BenmasterTM]

Im running webtorrent over Electron using a webview for the process like the Webtorrent Desktop client.

• Webtorrent 0.98.19
• Windows 10, Electron, Node 6.10.2

Problem: If you add a torrent torrent using magnet (whatever) and then remove and try to add again, the torrent keep checking, and no data is loaded (no metadata, nothing), if you wait 1-2 minutes, and add again, the torrent works correctly. Appear to have some "timeout" to get the metadata ??

I add the torrent with webtorrent.add() and remove with webtorrent.remove(torrent) or torrent.destroy(), the problem happens in the 2 ways.

NOT WORKING LOG:

C:\client\node_modules\webtorrent\node_modules\debug\src\browser.js:123 webtorrent [2d57443] add +10s
C:\client\node_modules\webtorrent\node_modules\debug\src\browser.js:123 webtorrent:torrent [2d57443] [d173280] new torrent +1ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:client new client d17328085091e0c5fc0b2811f446c91007d01e61 +10s
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker new websocket tracker wss://tracker.btorrent.xyz +3ms
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [7a31e8e] new websocket: Objecturl: "wss://tracker.btorrent.xyz"__proto__: Object +9s
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker new websocket tracker wss://tracker.fastcast.nz +9ms
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [74c8889] new websocket: Object +9ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker new websocket tracker wss://tracker.openwebtorrent.com +2ms
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [5a71e19] new websocket: Objecturl: "wss://tracker.openwebtorrent.com"__proto__: Object +1ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:client setInterval 900000 +2ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:client send `start` +0ms
C:\client\node_modules\torrent-discovery\node_modules\debug\src\browser.…:123 torrent-discovery dht announce +10s
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [2efe9d3] announce d17328085091e0c5fc0b2811f446c91007d01e61 55493 +12s
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [5a71e19] connect +100ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker generating 10 offers +99ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +0ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [a414636] new peer Object +10s
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +3ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [25b9ac3] new peer Object +2ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +2ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [ed51fcf] new peer Object +2ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +2ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [4fb0eff] new peer Object +2ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +1ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [d04cd2e] new peer Object +2ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +2ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [71b5831] new peer Object +2ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +2ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [213a3eb] new peer Object +1ms

Wait 2 minutes, and add again.

WORKING LOG:

webtorrent Object +3s
C:\client\node_modules\webtorrent\node_modules\debug\src\browser.js:123 webtorrent [2d57443] add +44s
C:\client\node_modules\webtorrent\node_modules\debug\src\browser.js:123 webtorrent:torrent [2d57443] [d173280] new torrent +1ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:client new client d17328085091e0c5fc0b2811f446c91007d01e61 +0ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker new websocket tracker wss://tracker.btorrent.xyz +1ms
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [b7b941f] new websocket: Object +0ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker new websocket tracker wss://tracker.fastcast.nz +7ms
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [ad20e09] new websocket: Object +6ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker new websocket tracker wss://tracker.openwebtorrent.com +2ms
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [d753f11] new websocket: Object +3ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:client setInterval 900000 +2ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:client send `start` +1ms
C:\client\node_modules\torrent-discovery\node_modules\debug\src\browser.…:123 torrent-discovery dht announce +0ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] lookup d17328085091e0c5fc0b2811f446c91007d01e61 +37s
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node 3770162aa4ee34f0dce3b9353ecb2ab636540ef9 (target: d17328085091e0c5fc0b2811f446c91007d01e61) +31ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node 42997f771acae35246535de1dc062b0315c2fd1c (target: d17328085091e0c5fc0b2811f446c91007d01e61) +19ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node a1e56126e77687109a819e060c9740e4c6a710aa (target: d17328085091e0c5fc0b2811f446c91007d01e61) +1ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node 3753a09e28faa108ae5aed22a6e04d65f3f75729 (target: d17328085091e0c5fc0b2811f446c91007d01e61) +18ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node d0701c311141337c28173acc7ab1f7a223203077 (target: d17328085091e0c5fc0b2811f446c91007d01e61) +6ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node 375335c2a606f060f5154216cec4de045c9ed0eb (target: d17328085091e0c5fc0b2811f446c91007d01e61) +29ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node 3753a8f8f0adb9398336938e1ddf7b70e480f62c (target: d17328085091e0c5fc0b2811f446c91007d01e61) +4ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node d01bda4a9425c352b9c4a8bc7aefb95ed8b23d32 (target: d17328085091e0c5fc0b2811f446c91007d01e61) +2ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node 9c1afe30cb8f049ba9bbffcbe54f337111b4f3f0 (target: d17328085091e0c5fc0b2811f446c91007d01e61) +2ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node 84d6279d0b8932b72336d6a275129aba500595a3 (target: d17328085091e0c5fc0b2811f446c91007d01e61) +16ms
C:\client\node_modules\bittorrent-dht\node_modules\debug\src\browser.js:123 bittorrent-dht [3753a02] found node d19fb3c80874d378cf7c67056e9720e51c129cdb (target: d17328085091e0c5fc0b2811f446c91007d01e61) +7ms
C:\client\node_modules\simple-websocket\node_modules\debug\src\browser.js:123 simple-websocket [d753f11] connect +141ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker generating 10 offers +141ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +1ms
C:\client\node_modules\simple-peer\node_modules\debug\src\browser.js:123 simple-peer [5d44c90] new peer Object +0ms
C:\client\node_modules\bittorrent-tracker\node_modules\debug\src\browser…:123 bittorrent-tracker:websocket-tracker creating peer (from _generateOffers) +9ms

The diference I see is the lines after the "torrent-discovery dht announce", in the working log this happens:

bittorrent-dht [3753a02] lookup
bittorrent-dht [3753a02] found node 3770162aa4ee34
bittorrent-dht [3753a02] found node 42997f771ac
bittorrent-dht [3753a02] found node a1e56126e

in the non-working log this lines dont appear.

[Fabiencdp]

It append for me only when using infoHash, but it work well using magnetUri.
When calling client.add(infoHash); then client.remove(infoHash); it work as excepted, if i log client.torrents.length i get a length of 0.
But if i add the same torrent using client.add(infoHash); it never fire on metadata event. only on infoHash event is fired.

[feross]

You should probably wait for the 'close' callback that indicates that the torrent is completely destroyed before you try to re-add it. There is cleanup that is asynchronous, so the torrent might not be done being cleaned up if you add again immediately.