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I started up transmission after having not used it for a bit. When I started a download my cpu went up to almost 100% and there was constant reading of my root drive. Looking at iotop, I could see that just about every process I was running under 'user' was constantly reading the disk.
I have transmission set up to run under the 'transmission' user, and write exclusively to an external drive set up with the permissions outlined in the wiki.
I am unable to kill transmission-daemon with 'sudo kill -9 $(pidof transmission-daemon)' nor am I able to kill it with sysrq+e/i.
Looking at 'journalctl -b-1':
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: Transmission 3.00 (bb6b5a062e) started (session.c:769)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: RPC Server Adding address to whitelist: 127.0.0.1 (rpc-server.c:956)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: RPC Server Adding address to whitelist: ::1 (rpc-server.c:956)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: RPC Server Serving RPC and Web requests on 0.0.0.0:9091/transmission/ (rpc-server.c:1243)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: RPC Server Whitelist enabled (rpc-server.c:1249)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: UDP Failed to set receive buffer: requested 4194304, got 425984 (tr-udp.c:97)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: UDP Please add the line "net.core.rmem_max = 4194304" to /etc/sysctl.conf (tr-udp.c:99)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: UDP Failed to set send buffer: requested 1048576, got 425984 (tr-udp.c:105)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: UDP Please add the line "net.core.wmem_max = 1048576" to /etc/sysctl.conf (tr-udp.c:107)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: DHT Reusing old id (tr-dht.c:383)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: DHT Bootstrapping from 59 IPv4 nodes (tr-dht.c:172)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: Using settings from "/var/lib/transmission/.config/transmission-daemon" (daemon.c:646)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: Saved "/var/lib/transmission/.config/transmission-daemon/settings.json" (variant.c:1221)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: Loaded 44 torrents (session.c:2170)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: Port Forwarding (NAT-PMP) initnatpmp succeeded (0) (natpmp.c:73)
Aug 25 23:09:08 <hostname> transmission-daemon[16955]: Port Forwarding (NAT-PMP) sendpublicaddressrequest succeeded (2) (natpmp.c:73)
Aug 25 23:09:15 <hostname> transmission-daemon[16955]: Port Forwarding State changed from "Not forwarded" to "Starting" (port-forwarding.c:106)
Aug 25 23:09:15 <hostname> transmission-daemon[16955]: web will verify tracker certs using envvar CURL_CA_BUNDLE: none (web.c:455)
Aug 25 23:09:15 <hostname> transmission-daemon[16955]: web NB: this only works if you built against libcurl with openssl or gnutls, NOT nss (web.c:457)
Aug 25 23:09:15 <hostname> transmission-daemon[16955]: web NB: invalid certs will show up as 'Could not connect to tracker' like many other errors (web.c:458)
Aug 25 23:09:15 <hostname> transmission-daemon[16955]: Port Forwarding State changed from "Starting" to "???" (port-forwarding.c:106)
Aug 25 23:09:15 <hostname> transmission-daemon[16955]: Searching for web interface file "/var/lib/transmission/.local/share/transmission/web/index.html" (platfor>
Aug 25 23:09:16 <hostname> transmission-daemon[16955]: Searching for web interface file "/usr/share/transmission/web/index.html" (platform.c:472)After that, I just get a lot of the following from every torrent. Everything was paused except for the one torrent I set to download, which gave the same output to journal.
Aug 25 23:10:20 <hostname> transmission-daemon[16955]: <torrent> Scrape error: Connection failed (announcer.c:1392)
Aug 25 23:10:20 <hostname> transmission-daemon[16955]: <torrent> Retrying scrape in 20 seconds. (announcer.c:1401)Offline