#21312: Memory and file descriptor leaks in programs that use go-webrtc -----------------------------------+------------------------- Reporter: arlolra | Owner: arlolra Type: defect | Status: closed Priority: High | Milestone: Component: Obfuscation/Snowflake | Version: Severity: Major | Resolution: fixed Keywords: | Actual Points: Parent ID: | Points: Reviewer: | Sponsor: -----------------------------------+-------------------------
Comment (by dcf): Replying to [comment:59 dcf]: > I'm thinking about losing the periodic restarts, and just putting a memory ulimit on the processes (just in case). I've done this now, removing the periodic restarts. There are still the same number of proxies, 3 for the App Engine broker and 3 for the standalone broker. I first tried limiting the memory using the [http://smarden.org/runit/chpst.8.html chpst] program that we're already using to change the uid: {{{ exec chpst -u snowflake-proxy -m 419430400 proxy-go }}} However chpst does not work, it seems due to some bad interaction with Cgo. No matter how much memory I give it, it aborts immediately with this error: {{{ runtime/cgo: pthread_create failed: Resource temporarily unavailable SIGABRT: abort PC=0x7f0fe207afcf m=0 goroutine 0 [idle]: goroutine 1 [running]: runtime.systemstack_switch() /usr/lib/go-1.7/src/runtime/asm_amd64.s:252 fp=0xc42001e768 sp=0xc42001e760 runtime.main() /usr/lib/go-1.7/src/runtime/proc.go:127 +0x6c fp=0xc42001e7c0 sp=0xc42001e768 runtime.goexit() /usr/lib/go-1.7/src/runtime/asm_amd64.s:2086 +0x1 fp=0xc42001e7c8 sp=0xc42001e7c0 goroutine 17 [syscall, locked to thread]: runtime.goexit() /usr/lib/go-1.7/src/runtime/asm_amd64.s:2086 +0x1 }}} So instead, I'm just using ulimit like this: {{{ ulimit -v 409600 exec chpst -u snowflake-proxy proxy-go }}} I originally gave each process 200 MB. But they were restarting (on average once during the 15 minutes I was watching). So I then bumped it up to 400 MB. Here are the timestamps: ||2018-03-22 03:03:45 ||ulimit to 200 MB || ||2018-03-22 03:19:19 ||ulimit to 400 MB || -- Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21312#comment:63> Tor Bug Tracker & Wiki <https://trac.torproject.org/> The Tor Project: anonymity online
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