- What Grafana version and what operating system are you using?
ubuntu 22.04, grafana 11.6.7
- What are you trying to achieve?
upgrade grafana to version 11.6.8
- How are you trying to achieve it?
via ubuntu standard package upgrade,
sudo apt-get install grafana=11.6.8
- What happened?
grafana fails to start, throwing an error about failing to run a migration. This failed migration actually crashes mysql [ percona-server-server 8.0.45-36-1.jammy ]. There is no indication in the changelog (https://github.com/grafana/grafana/blob/main/CHANGELOG.md#1168-2025-11-19), that there were any changes in 11.6.8
2026-04-06T13:34:00Z UTC - mysqld got signal 11 ;
Most likely, you have hit a bug, but this error can also be caused by malfunctioning hardware.
BuildID[sha1]=0832afafe1217abd80e6981fb17855f1345ae8d3
Server Version: 8.0.45-36 Percona Server (GPL), Release '36', Revision '8fe4a72d'
Thread pointer: 0x7f936c013f30
40364 logger=migrator t=2026-04-06T09:33:59.97842203-04:00 level=debug msg="Skipping migration: Already executed" id="drop my_row_id and add primary key to file table i f my_row_id exists (auto-generated mysql column)"
40365 logger=migrator t=2026-04-06T09:33:59.980921148-04:00 level=info msg="Executing migration" id="drop file_path unique index from file table if it exists (mysql)"
40366 logger=migrator t=2026-04-06T09:33:59.980949476-04:00 level=debug msg="Executing migration condition SQL" id="drop file_path unique index from file table if it ex ists (mysql)" sql="SELECT 1 FROM `INFORMATION_SCHEMA`.`STATISTICS` WHERE `TABLE_SCHEMA` = DATABASE() AND `TABLE_NAME`=? AND `INDEX_NAME`=?" args="[file UQE_file_p ath_hash]"
40367 logger=migrator t=2026-04-06T09:33:59.982636376-04:00 level=debug msg="Executing sql migration" id="drop file_path unique index from file table if it exists (mysq l)" sql="ALTER TABLE file DROP INDEX UQE_file_path_hash"
40368 logger=migrator t=2026-04-06T09:34:00.105869443-04:00 level=error msg="Executing migration failed" id="drop file_path unique index from file table if it exists (m ysql)" error="invalid connection" duration=124.943421ms
40369 logger=migrator t=2026-04-06T09:34:00.105945307-04:00 level=error msg="Exec failed" error="invalid connection" sql="ALTER TABLE file DROP INDEX UQE_file_path_hash "
40370 logger=migrator t=2026-04-06T09:34:00.106106513-04:00 level=info msg="Unlocking database"
40371 logger=migrator t=2026-04-06T09:34:00.106195517-04:00 level=error msg="Failed to unlock database" error="invalid connection"
40372 logger=settings t=2026-04-06T09:34:00.851181369-04:00 level=info msg="Starting Grafana" version=11.6.8 commit=c3e34314f7e137bde0d27194f4f0933256681f1b branch=rele ase-11.6.8 compiled=2026-04-06T09:34:00-04:00
- What did you expect to happen?
Grafana successfully upgrade and start up properly
- Can you copy/paste the configuration(s) that you are having problems with?
##################### Grafana Configuration Example #####################
#
# Everything has defaults so you only need to uncomment things you want to
# change
# possible values : production, development
; app_mode = production
# instance name, defaults to HOSTNAME environment variable value or hostname if HOSTNAME var is empty
; instance_name = ${HOSTNAME}
#################################### Paths ####################################
[paths]
# Path to where grafana can store temp files, sessions, and the sqlite3 db (if that is used)
#
;data = /var/lib/grafana
#
# Directory where grafana can store logs
#
;logs = /var/log/grafana
#
# Directory where grafana will automatically scan and look for plugins
#
;plugins = /var/lib/grafana/plugins
#
#################################### Server ####################################
[server]
domain = hostname.internal
root_url = %(protocol)s://%(domain)s:/grafana-engine
# Protocol (http, https, socket)
;protocol = http
# The ip address to bind to, empty will bind to all interfaces
;http_addr =
# The http port to use
;http_port = 3000
# The public facing domain name used to access grafana from a browser
;domain = localhost
# Redirect to correct domain if host header does not match domain
# Prevents DNS rebinding attacks
;enforce_domain = false
# The full public facing url you use in browser, used for redirects and emails
# If you use reverse proxy and sub path specify full url (with sub path)
;root_url = http://localhost:3000
# Log web requests
;router_logging = false
# the path relative working path
;static_root_path = public
# enable gzip
;enable_gzip = false
# https certs & key file
;cert_file =
;cert_key =
# Unix socket path
;socket =
#################################### Database ####################################
[database]
# You can configure the database connection by specifying type, host, name, user and password
# as seperate properties or as on string using the url propertie.
# Either "mysql", "postgres" or "sqlite3", it's your choice
;type = mysql
;host = 127.0.0.1:3306
;name = grafana
;user = root
# If the password contains # or ; you have to wrap it with trippel quotes. Ex """#password;"""
;password =
# Use either URL or the previous fields to configure the database
# Example: mysql://user:secret@host:port/database
url = mysql://redacted_username:redacted_password@hostname.internal:3306/grafana
# For "postgres" only, either "disable", "require" or "verify-full"
;ssl_mode = disable
# For "sqlite3" only, path relative to data_path setting
;path = grafana.db
# Max conn setting default is 0 (mean not set)
;max_idle_conn =
;max_open_conn =
#################################### Session ####################################
[session]
# Either "memory", "file", "redis", "mysql", "postgres", default is "file"
;provider = file
# Provider config options
# memory: not have any config yet
# file: session dir path, is relative to grafana data_path
# redis: config like redis server e.g. `addr=127.0.0.1:6379,pool_size=100,db=grafana`
# mysql: go-sql-driver/mysql dsn config string, e.g. `user:password@tcp(127.0.0.1:3306)/database_name`
# postgres: user=a password=b host=localhost port=5432 dbname=c sslmode=disable
;provider_config = sessions
# Session cookie name
;cookie_name = grafana_sess
# If you use session in https only, default is false
;cookie_secure = false
# Session life time, default is 86400
;session_life_time = 86400
#################################### Data proxy ###########################
[dataproxy]
# This enables data proxy logging, default is false
;logging = false
#################################### Analytics ####################################
[analytics]
# Server reporting, sends usage counters to stats.grafana.org every 24 hours.
# No ip addresses are being tracked, only simple counters to track
# running instances, dashboard and error counts. It is very helpful to us.
# Change this option to false to disable reporting.
;reporting_enabled = true
# Set to false to disable all checks to https://grafana.net
# for new vesions (grafana itself and plugins), check is used
# in some UI views to notify that grafana or plugin update exists
# This option does not cause any auto updates, nor send any information
# only a GET request to http://grafana.com to get latest versions
;check_for_updates = true
# Google Analytics universal tracking code, only enabled if you specify an id here
;google_analytics_ua_id =
#################################### Security ####################################
[security]
# default admin user, created on startup
admin_user = grafana_admin
# default admin password, can be changed before first start of grafana, or in profile settings
admin_password = redacted
# used for signing
;secret_key = redacted
# Auto-login remember days
;login_remember_days = 7
;cookie_username = grafana_user
;cookie_remember_name = grafana_remember
# disable gravatar profile images
;disable_gravatar = false
# data source proxy whitelist (ip_or_domain:port separated by spaces)
;data_source_proxy_whitelist =
[snapshots]
# snapshot sharing options
;external_enabled = true
;external_snapshot_url = https://snapshots-origin.raintank.io
;external_snapshot_name = Publish to snapshot.raintank.io
# remove expired snapshot
;snapshot_remove_expired = true
# remove snapshots after 90 days
;snapshot_TTL_days = 90
#################################### Users ####################################
[users]
# disable user signup / registration
allow_sign_up = false
# Allow non admin users to create organizations
;allow_org_create = true
# Set to true to automatically assign new users to the default organization (id 1)
;auto_assign_org = true
# Default role new users will be automatically assigned (if disabled above is set to true)
;auto_assign_org_role = Viewer
# Background text for the user field on the login page
;login_hint = email or username
# Default UI theme ("dark" or "light")
;default_theme = dark
[auth]
# Set to true to disable (hide) the login form, useful if you use OAuth, defaults to false
;disable_login_form = false
# Set to true to disable the signout link in the side menu. useful if you use auth.proxy, defaults to false
;disable_signout_menu = false
#################################### Anonymous Auth ##########################
[auth.anonymous]
# enable anonymous access
enabled = false
# specify organization name that should be used for unauthenticated users
;org_name = Main Org.
# specify role for unauthenticated users
;org_role = Viewer
#################################### Basic Auth ##########################
[auth.basic]
enabled = true
#################################### Auth LDAP ##########################
[auth.ldap]
enabled = true
config_file = /etc/grafana/ldap.toml
allow_sign_up = true
#################################### Logging ##########################
[log]
# Either "console", "file", "syslog". Default is console and file
# Use space to separate multiple modes, e.g. "console file"
;mode = console file
# Either "trace", "debug", "info", "warn", "error", "critical", default is "info"
;level = info
# optional settings to set different levels for specific loggers. Ex filters = sqlstore:debug
;filters =
# For "console" mode only
[log.console]
;level =
# log line format, valid options are text, console and json
;format = console
# For "file" mode only
[log.file]
;level =
# log line format, valid options are text, console and json
;format = text
# This enables automated log rotate(switch of following options), default is true
;log_rotate = true
# Max line number of single file, default is 1000000
;max_lines = 1000000
# Max size shift of single file, default is 28 means 1 << 28, 256MB
;max_size_shift = 28
# Segment log daily, default is true
;daily_rotate = true
# Expired days of log file(delete after max days), default is 7
;max_days = 7
[log.syslog]
;level =
# log line format, valid options are text, console and json
;format = text
# Syslog network type and address. This can be udp, tcp, or unix. If left blank, the default unix endpoints will be used.
;network =
;address =
# Syslog facility. user, daemon and local0 through local7 are valid.
;facility =
# Syslog tag. By default, the process' argv[0] is used.
;tag =
#################################### AMQP Event Publisher ##########################
[event_publisher]
;enabled = false
;rabbitmq_url = amqp://localhost/
;exchange = grafana_events
;#################################### Dashboard JSON files ##########################
[dashboards.json]
;enabled = false
;path = /var/lib/grafana/dashboards
#################################### Alerting ############################
[alerting]
# Disable alerting engine & UI features
enabled = false
# Makes it possible to turn off alert rule execution but alerting UI is visible
;execute_alerts = true
#################################### Internal Grafana Metrics ##########################
# Metrics available at HTTP API Url /api/metrics
[metrics]
# Disable / Enable internal metrics
;enabled = true
# Publish interval
;interval_seconds = 10
# Send internal metrics to Graphite
[metrics.graphite]
# Enable by setting the address setting (ex localhost:2003)
;address =
;prefix = prod.grafana.%(instance_name)s.
#################################### Grafana.com integration ##########################
# Url used to to import dashboards directly from Grafana.com
[grafana_com]
;url = https://grafana.com
#################################### External image storage ##########################
[external_image_storage]
# Used for uploading images to public servers so they can be included in slack/email messages.
# you can choose between (s3, webdav)
;provider =
[external_image_storage.s3]
;bucket_url =
;access_key =
;secret_key =
[external_image_storage.webdav]
;url =
;public_url =
;username =
;password =
-
Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.
-
Did you follow any online instructions? If so, what is the URL?
