Hello,
I'm currently issuing a recurrent error (multiple times every ~6h):
level=error msg="Recovered from panic in http handler: net/http: abort Handler" middlewareType=Recovery middlewareName=traefik-internal-recovery
I have 2 entrypoints, 9 HTTP Routers, 6 HTTP services, 2 middlewares. Metrics on InfluxDB + Accesslog enabled.
Sorry, I don't know how to reproduce it. Do you have any idea?
If you want more details, just ask. 
Thanks for reading.
Hello,
could you provide the full stacktrace and more information about your context (configuration, docker-compose files, version, ...)
Sure, here all my Traefik-related configurations. (I've changed my real domain by example.com).
For the stacktrace, sorry, I just have the log message I posted.
# devops/docker-compose.yml
version: '3.5'
networks:
traefik:
name: traefik
volumes:
influxdb: ~
services:
traefik:
image: traefik:v2.0
ports:
- 0.0.0.0:80:80
- 0.0.0.0:443:443
networks:
- traefik
volumes:
- /var/run/docker.sock:/var/run/docker.sock
- ./log:/var/log/traefik
- ./traefik.yml:/etc/traefik/traefik.yml
- ./traefik_dynamic.yml:/dynamic_conf.yml
- ./acme.json:/acme.json
labels:
- "traefik.enable=true"
- "traefik.http.routers.dashboard.rule=Host(`traefik.example.com`)"
- "traefik.http.routers.dashboard.entrypoints=web-secure"
- "traefik.http.routers.dashboard.service=api@internal"
- "traefik.http.routers.dashboard.tls.certresolver=ovh_acme"
- "traefik.http.routers.dashboard.middlewares=auth-admin@file"
restart: unless-stopped
redis-commander:
image: rediscommander/redis-commander:latest
labels:
- "traefik.enable=true"
- "traefik.http.routers.redis-commander.rule=Host(`redis.example.com`)"
- "traefik.http.routers.redis-commander.entrypoints=web-secure"
- "traefik.http.services.redis-commander.loadbalancer.server.port=8081"
- "traefik.http.routers.redis-commander.tls.certresolver=ovh_acme"
- "traefik.http.routers.redis-commander.middlewares=auth-admin@file"
networks:
- traefik
ports:
- 127.0.0.1:8081:8081
restart: unless-stopped
influxdb:
image: influxdb:1.7-alpine
networks:
- traefik
grafana:
image: grafana/grafana:latest
networks:
- traefik
labels:
- "traefik.enable=true"
- "traefik.http.routers.grafana.rule=Host(`grafana.example.com`)"
- "traefik.http.routers.grafana.entrypoints=web-secure"
- "traefik.http.services.grafana.loadbalancer.server.port=3000"
- "traefik.http.routers.grafana.tls.certresolver=ovh_acme"
- "traefik.http.routers.grafana.middlewares=auth-admin@file"
# devops/traefik.yml
log:
level: INFO
accessLog:
filePath: "/var/log/traefik/access.log"
bufferingSize: 100
entryPoints:
web:
address: ":80"
web-secure:
address: ":443"
providers:
file:
filename: dynamic_conf.yml
docker:
exposedbydefault: false
network: traefik
certificatesResolvers:
ovh_acme:
acme:
email: foobar@example.com
storage: acme.json
dnsChallenge:
provider: ovh
delayBeforeCheck: 0
api:
dashboard: true
metrics:
influxDB:
address: influxdb:8089
protocol: udp
pushInterval: 30
database: default
addEntryPointsLabels: true
addServicesLabels: true
# devops/traefik_dynamic.yml
http:
middlewares:
auth-admin:
basicAuth:
users:
- 'admin:$2y$05$xxxxxx'
realm: ForAdminOnly
removeHeader: true
# example.com/docker-compose.yml
version: '3.5'
networks:
traefik:
external:
name: traefik
services:
apache:
image: example_apache:${APP_VERSION:-latest}
networks:
- default
- traefik
labels:
- "traefik.enable=true"
- "traefik.http.routers.example.rule=Host(`example.com`)"
- "traefik.http.routers.example.entrypoints=web-secure"
- "traefik.http.services.example.loadbalancer.server.port=80"
- "traefik.http.routers.example.tls.certresolver=ovh_acme"
- "traefik.http.routers.example_insecure.rule=Host(`example.com`)"
- "traefik.http.routers.example_insecure.entrypoints=web"
- "traefik.http.routers.example_insecure.middlewares=redirect_https@docker"
- "traefik.http.middlewares.redirect_https.redirectscheme.scheme=https"
- "traefik.http.middlewares.redirect_https.redirectscheme.permanent=true"
# other internal services
# blog/docker-compose.yml
version: '3.5'
networks:
traefik:
external:
name: traefik
services:
ghost:
image: ghost:2-alpine
restart: unless-stopped
volumes:
- ./content:/var/lib/ghost/content
environment:
url: 'https://blog.example.com'
networks:
- default
- traefik
labels:
- "traefik.enable=true"
- "traefik.http.routers.blog.rule=Host(`blog.example.com`)"
- "traefik.http.routers.blog.entrypoints=web-secure"
- "traefik.http.services.blog.loadbalancer.server.port=2368"
- "traefik.http.routers.blog.tls.certresolver=ovh_acme"
- "traefik.http.routers.blog_insecure.rule=Host(`blog.example.com`)"
- "traefik.http.routers.blog_insecure.entrypoints=web"
- "traefik.http.routers.blog_insecure.middlewares=redirect_https@docker"
# webext/docker-compose.yml
version: '3.5'
networks:
traefik:
external:
name: traefik
services:
apache:
image: httpd:2.4-alpine
networks:
- traefik
volumes:
- ./builds:/srv/builds
- ./httpd.conf:/usr/local/apache2/conf/httpd.conf
labels:
- "traefik.enable=true"
- "traefik.http.routers.webext.rule=Host(`ext.example.com`)"
- "traefik.http.routers.webext.entrypoints=web-secure"
- "traefik.http.services.webext.loadbalancer.server.port=80"
- "traefik.http.routers.webext.tls.certresolver=ovh_acme"
- "traefik.http.routers.webext_insecure.rule=Host(`ext.example.com`)"
- "traefik.http.routers.webext_insecure.entrypoints=web"
- "traefik.http.routers.webext_insecure.middlewares=redirect_https@docker"
could you try a way to get the full stacktrace, I really need that to debug.
EDIT: the stacktrace is not displayed, I will improve this part.
Thanks for the PR https://github.com/containous/traefik/pull/5654. 
I'll post the stacktrace at the next version.