Telegraf repeatedly panics

[f1erro]

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Bug report

Telegraf is continually crashing

Relevant telegraf.conf:

https://gist.github.com/F1ERRO/3746486081dddd52aff14fb4bcc8cf67

System info:

Running telegraf in docker

Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x654edb]
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: goroutine 120 [running]:
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: panic(0xf2a2e0, 0xc42000c070)
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]:         /usr/local/go/src/runtime/panic.go:500 +0x1a1
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: github.com/influxdata/influxdb/client/v2.(*client).Write(0xc420012180, 0x18fd660, 0xc42066d8c0, 0x0, 0x0)
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]:         /home/ubuntu/telegraf-build/src/github.com/influxdata/influxdb/client/v2/client.go:354 +0xfb
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: github.com/influxdata/telegraf/plugins/outputs/influxdb.(*InfluxDB).Write(0xc42000a700, 0xc42066b000, 0x7b, 0x7b, 0xc42001ee58, 0x6b3911
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]:         /home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/plugins/outputs/influxdb/influxdb.go:202 +0x27b
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: github.com/influxdata/telegraf/internal/models.(*RunningOutput).write(0xc420190a00, 0xc42066b000, 0x7b, 0x7b, 0x7b, 0x30)
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]:         /home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/internal/models/running_output.go:170 +0xa1
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: github.com/influxdata/telegraf/internal/models.(*RunningOutput).Write(0xc420190a00, 0x11562e0, 0xc420686d00)
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]:         /home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/internal/models/running_output.go:154 +0x49c
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: github.com/influxdata/telegraf/agent.(*Agent).flush.func1(0xc420686d00, 0xc420190a00)
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]:         /home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/agent/agent.go:232 +0x68
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]: created by github.com/influxdata/telegraf/agent.(*Agent).flush
Jan 31 23:11:30 ip-172-31-8-38.ec2.internal docker[3176]:         /home/ubuntu/telegraf-build/src/github.com/influxdata/telegraf/agent/agent.go:237 +0xb4```

[Include Telegraf version, operating system name, and other relevant details]
running latest telegraf docker image on coreOS

Steps to reproduce:

1. Run docker run --rm --name telegraf -p 8125:8125/udp -v /home/core/tele.conf:/etc/telegraf/telegraf.conf:ro --env-file /etc/profile.d/vars -e HOSTNAME=${COREOS_PRIVATE_IPV4} -v /var/run/docker.sock:/var/run/docker.sock telegraf

2. ...

Expected behavior:

Starts up and runs without crashing

Actual behavior:

Starts up then crashes frequently

[sparrc]

thanks for the report, this is a dupe of #2317