Telegraf 1.21.0 - segmentation violation when using logparser #10286
Description
Relevent telegraf.conf
[global_tags]
[agent]
interval = "15s"
round_interval = true
metric_batch_size = 1000
metric_buffer_limit = 10000
collection_jitter = "0s"
flush_interval = "10s"
flush_jitter = "0s"
precision = ""
debug = false
quiet = false
logfile = ""
hostname = ""
omit_hostname = falseSystem info
CentOS 7, Telegraf 1.21.0 (git: HEAD efa6522)
Docker
The Docker file is here:
https://github.com/hluaces/telegraf-bug-1.21.0
Please see the README.md for instructions on reproducing the error.
Steps to reproduce
See the linked Dockerfile for instructions on how to reproduce.
Apparently the tail input seems to be failing when parsing logs. This did not happen in the 1.20 branches.
Expected behavior
Logs should be parsed without unexpected failures.
Actual behavior
Telegraf is failing with an error.
Additional info
This is the error output:
2021-12-16T10:11:13Z I! Starting Telegraf 1.21.0
2021-12-16T10:11:13Z I! Loaded inputs: tail
2021-12-16T10:11:13Z I! Loaded aggregators:
2021-12-16T10:11:13Z I! Loaded processors:
2021-12-16T10:11:13Z I! W! Outputs are not used in testing mode!
2021-12-16T10:11:13Z I! Tags enabled: host=30c097b3ff33
2021-12-16T10:11:13Z D! [agent] Initializing plugins
2021-12-16T10:11:13Z D! [agent] Starting service inputs
2021-12-16T10:11:13Z D! [inputs.tail] Tail added for "/usr/local/cpanel/logs/spamd_error_log"
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x7c8b5f]
goroutine 72 [running]:
github.com/influxdata/telegraf/plugins/parsers/grok.(*Parser).ParseLine(0xc0004821e0, {0xc0000bcee0, 0x68})
/go/src/github.com/influxdata/telegraf/plugins/parsers/grok/parser.go:213 +0x2ff
github.com/influxdata/telegraf/plugins/parsers/grok.(*Parser).Parse(0x44ab40, {0xc0000bce70, 0x68, 0x70})
/go/src/github.com/influxdata/telegraf/plugins/parsers/grok/parser.go:386 +0x15c
github.com/influxdata/telegraf/plugins/inputs/tail.parseLine({0x577f6b0, 0xc0004821e0}, {0xc0000bd1f0, 0x0})
/go/src/github.com/influxdata/telegraf/plugins/inputs/tail/tail.go:303 +0x10f
github.com/influxdata/telegraf/plugins/inputs/tail.(*Tail).receiver(0xc0001af600, {0x577f6b0, 0xc0004821e0}, 0xc0007266e0)
/go/src/github.com/influxdata/telegraf/plugins/inputs/tail/tail.go:371 +0x4f4
github.com/influxdata/telegraf/plugins/inputs/tail.(*Tail).tailNewFiles.func2()
/go/src/github.com/influxdata/telegraf/plugins/inputs/tail/tail.go:275 +0x85
created by github.com/influxdata/telegraf/plugins/inputs/tail.(*Tail).tailNewFiles
/go/src/github.com/influxdata/telegraf/plugins/inputs/tail/tail.go:273 +0x7af