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Re: [tor-bugs] #21312 [Obfuscation/Snowflake]: snowflake-client is pegged at 100% cpu
#21312: snowflake-client is pegged at 100% cpu
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Reporter: arlolra | Owner:
Type: defect | Status: new
Priority: Medium | Milestone:
Component: Obfuscation/Snowflake | Version:
Severity: Normal | Resolution:
Keywords: | Actual Points:
Parent ID: | Points:
Reviewer: | Sponsor:
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Comment (by dcf):
I encountered this lockup for the first time today. snowflake-client was
using 200% CPU. I had been browsing and my requests started timing out.
Here is the end of snowflake.log; it must have been around 17:00:00 when I
noticed the hang.
{{{
2017/08/09 16:58:43 ---- Handler: snowflake assigned ----
2017/08/09 16:58:43 Buffered 201 bytes --> WebRTC
2017/08/09 16:58:43 WebRTC: DataChannel.OnOpen
2017/08/09 16:58:43 Flushed 201 bytes.
2017/08/09 16:58:45 Traffic Bytes (in|out): 743 | 201 -- (1 OnMessages, 1
Sends)
2017/08/09 16:58:51 Traffic Bytes (in|out): 51 | 166 -- (1 OnMessages, 2
Sends)
2017/08/09 16:58:53 WebRTC: At capacity [1/1] Retrying in 10 seconds...
2017/08/09 16:59:03 WebRTC: At capacity [1/1] Retrying in 10 seconds...
2017/08/09 16:59:13 WebRTC: At capacity [1/1] Retrying in 10 seconds...
2017/08/09 16:59:17 WebRTC: No messages received for 30 seconds -- closing
stale connection.
2017/08/09 16:59:17 WebRTC: closing DataChannel
2017/08/09 16:59:23 WebRTC: Collecting a new Snowflake. Currently at [0/1]
2017/08/09 16:59:23 snowflake-SeQZtvutAUlE6pFr connecting...
2017/08/09 17:03:45 copy loop ended
2017/08/09 17:03:45 ---- Handler: closed ---
2017/08/09 17:03:45 SOCKS listening...
2017/08/09 17:03:46 SOCKS accepted: {0.0.3.0:1 map[]}
}}}
The process had 521 threads, not 1024.
* [attachment:20170809-info-threads.txt info threads]
* [attachment:20170809-thread-apply-all-bt.txt thread apply all bt]
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21312#comment:9>
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