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https://issues.apache.org/jira/browse/TS-4636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15748956#comment-15748956
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Daniel Xu commented on TS-4636:
-------------------------------
Figured it out. The reason {{traffic_server}} opens {{traffic.out}} 6x is
because TS inherits 4 FDs from {{traffic_manager}}. TS then overrides stdout
and stderr while opening 2 more FDs. That makes 6 total.
As far as I know, this could be improved/fixed (FD_CLOEXEC) but I don't see any
reason to spend time doing it. Let me know if there's a good argument,
[[email protected]].
> traffic.out is open too many times
> ----------------------------------
>
> Key: TS-4636
> URL: https://issues.apache.org/jira/browse/TS-4636
> Project: Traffic Server
> Issue Type: Bug
> Components: Core, Logging
> Reporter: James Peach
> Assignee: Daniel Xu
> Fix For: sometime
>
>
> Looks like something is wrong with {{traffic.out}}. I am expecting that this
> shold only be open twice (for stdout and stderr).
> {noformat}
> traffic_s 12272 nmadmin 0w CHR 1,3 0t0 1051
> /dev/null
> traffic_s 12272 nmadmin 1w REG 202,1 72377 524555
> /n/log/trafficserver/traffic.out
> traffic_s 12272 nmadmin 2w REG 202,1 72377 524555
> /n/log/trafficserver/traffic.out
> traffic_s 12272 nmadmin 3r DIR 202,1 4096 2 /
> traffic_s 12272 nmadmin 4u REG 202,1 3839 524557
> /n/log/trafficserver/manager.log
> traffic_s 12272 nmadmin 5u REG 202,1 72377 524555
> /n/log/trafficserver/traffic.out
> traffic_s 12272 nmadmin 6u 0000 0,9 0 6384
> anon_inode
> traffic_s 12272 nmadmin 7u REG 202,1 72377 524555
> /n/log/trafficserver/traffic.out
> traffic_s 12272 nmadmin 8u 0000 0,9 0 6384
> anon_inode
> traffic_s 12272 nmadmin 9u IPv4 19233316 0t0 TCP *:80
> (LISTEN)
> traffic_s 12272 nmadmin 10u IPv4 19233317 0t0 TCP
> *:443 (LISTEN)
> traffic_s 12272 nmadmin 11u 0000 0,9 0 6384
> anon_inode
> traffic_s 12272 nmadmin 12u 0000 0,9 0 6384
> anon_inode
> traffic_s 12272 nmadmin 13u unix 0xffff8801e2aaf080 0t0 19233322
> socket
> traffic_s 12272 nmadmin 14u REG 202,1 72377 524555
> /n/log/trafficserver/traffic.out
> traffic_s 12272 nmadmin 15u REG 202,1 72377 524555
> /n/log/trafficserver/traffic.out
> traffic_s 12272 nmadmin 16u unix 0xffff8800d9e63c00 0t0 19233956
> socket
> {noformat}
> {noformat}
> [root@qa1 ~]# lsof -P -p $(pidof traffic_server) | grep traffic.out
> [ET_NET 2317 nobody 1u REG 202,1 54210 1711082
> /opt/ats/var/log/trafficserver/traffic.out
> [ET_NET 2317 nobody 2u REG 202,1 54210 1711082
> /opt/ats/var/log/trafficserver/traffic.out
> [ET_NET 2317 nobody 5u REG 202,1 54210 1711082
> /opt/ats/var/log/trafficserver/traffic.out
> [ET_NET 2317 nobody 7u REG 202,1 54210 1711082
> /opt/ats/var/log/trafficserver/traffic.out
> [ET_NET 2317 nobody 17u REG 202,1 54210 1711082
> /opt/ats/var/log/trafficserver/traffic.out
> [ET_NET 2317 nobody 21u REG 202,1 54210 1711082
> /opt/ats/var/log/trafficserver/traffic.out
> {noformat}
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