filecount plugin: invalid memory address or nil pointer dereference

[c1982]

Hi,

Telegraph app throw excetion about filecount plugin after then service is stop.

System info

Windows Server 2012 R2 v6.3 build 3600

Config

[[inputs.filecount]]
directory = "C:\\app\\data\\que"
name = "*.log"
recursive = false
regular_only = false
size = 0

Error

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x18 pc=0xce7d41]

goroutine 216 [running]:
github.com/influxdata/telegraf/plugins/inputs/filecount.count.func1(0xc04288e380, 0x3a, 0x0, 0x0, 0x2190fa0, 0xc042716090, 0x0, 0x0)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecount.go:134 +0x81
path/filepath.walk(0xc042386620, 0x15, 0x21afd20, 0xc042a70000, 0xc042716030, 0x0, 0x30)
        /usr/local/go/src/path/filepath/path.go:377 +0x214
path/filepath.Walk(0xc042386620, 0x15, 0xc042716030, 0x1, 0xc042716000)
        /usr/local/go/src/path/filepath/path.go:403 +0x10d
github.com/influxdata/telegraf/plugins/inputs/filecount.count(0xc042386620, 0x15, 0x0, 0xc042716000, 0x0, 0x0)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecount.go:139 +0x8f
github.com/influxdata/telegraf/plugins/inputs/filecount.(*FileCount).Gather(0xc0420c8320, 0x21b0c80, 0xc042122680, 0x0, 0xc04237e000)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecount.go:183 +0xdc
github.com/influxdata/telegraf/agent.gatherWithTimeout.func1(0xc04208a360, 0xc042094e40, 0x21b0c80, 0xc042122680)
        /go/src/github.com/influxdata/telegraf/agent/agent.go:153 +0x4e
created by github.com/influxdata/telegraf/agent.gatherWithTimeout
        /go/src/github.com/influxdata/telegraf/agent/agent.go:152 +0xdb

Expected behavior:

telegraf windows service must be work ^_^

Actual behavior:

Service is stop

[glinton]

@c1982 what version of telegraf are you using here?

[c1982]

Telegraf 1.8.1 windows_amd64

[glinton]

Thanks, there have been some changes since 1.8.1 that may address this issue, is it possible for you to try with a nightly build? Thanks

[c1982]

Hi @glinton

Thanks for response.

I tested with your nighly build version, unfortunately not working.

ps: I count SMTP server queue with this plugin. Has a lot of write and delete file job in production.

Telegram Log

2018-10-11T20:56:00Z I! Starting Telegraf
2018-10-11T20:56:00Z I! Loaded inputs: inputs.win_perf_counters inputs.filecount
2018-10-11T20:56:00Z I! Loaded aggregators:
2018-10-11T20:56:00Z I! Loaded processors:
2018-10-11T20:56:00Z I! Loaded outputs: influxdb
2018-10-11T20:56:00Z I! Tags enabled: host=SMTP2
2018-10-11T20:56:00Z I! Agent Config: Interval:5s, Quiet:false, Hostname:"SMTP2", Flush Interval:10s

Error

C:\Program Files\telegraf>telegraf.exe -config=telegraf.conf
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x30 pc=0xce9196]

goroutine 307 [running]:
github.com/influxdata/telegraf/plugins/inputs/filecount.(*FileCount).nameFilter.
func1(0x0, 0x0, 0x21976e0, 0xc042935aa0, 0x6a)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecoun
t.go:83 +0x36
github.com/influxdata/telegraf/plugins/inputs/filecount.(*FileCount).filter(0xc0
421afce0, 0x0, 0x0, 0xc0423c9d48, 0x4b9924, 0xc042aea240)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecoun
t.go:191 +0x8c
github.com/influxdata/telegraf/plugins/inputs/filecount.(*FileCount).count.func1
(0xc042aea240, 0x2b, 0x0, 0x0, 0x2195700, 0xc042490ae0, 0x0, 0x0)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecoun
t.go:145 +0x87
path/filepath.walk(0xc0420988da, 0x6, 0x21b4440, 0xc04266e060, 0xc04271c640, 0x0
, 0x40)
        /usr/local/go/src/path/filepath/path.go:377 +0x214
path/filepath.Walk(0xc0420988da, 0x6, 0xc04271c640, 0x0, 0x1b2a020)
        /usr/local/go/src/path/filepath/path.go:403 +0x10d
github.com/influxdata/telegraf/plugins/inputs/filecount.(*FileCount).count(0xc04
21afce0, 0x21b53a0, 0xc0423dbde0, 0xc0420988da, 0x6, 0x0)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecoun
t.go:159 +0xf0
github.com/influxdata/telegraf/plugins/inputs/filecount.(*FileCount).Gather(0xc0
421afce0, 0x21b53a0, 0xc0423dbde0, 0x0, 0x0)
        /go/src/github.com/influxdata/telegraf/plugins/inputs/filecount/filecoun
t.go:211 +0xc0
github.com/influxdata/telegraf/agent.gatherWithTimeout.func1(0xc0426e13e0, 0xc04
23f1600, 0x21b53a0, 0xc0423dbde0)
        /go/src/github.com/influxdata/telegraf/agent/agent.go:153 +0x4e
created by github.com/influxdata/telegraf/agent.gatherWithTimeout
        /go/src/github.com/influxdata/telegraf/agent/agent.go:152 +0xdb