Error map
Redis closes idle clients (timeout setting) Redis: Closing idle client / Connection closed by server after timeout 300
Redis · layer 5, Data
Centre: this error. First ring: errors it is linked with (12). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (12)
Laravel: Symfony\Component\ErrorHandler\Error\FatalError: Maximum execution time of 30 seconds exceeded
A web request ran longer than PHP's `max_execution_time` and was killed.
Laravel: Symfony\Component\Process\Exception\ProcessTimedOutException: The process "npm run build" exceeded the timeout of 60 seconds
A subprocess launched via the `Process` class or `Process::run()` exceeded its allowed time.
Redis: Error: read ECONNRESET / redis.exceptions.ConnectionError: Connection reset by peer after idle time
A middlebox or Redis closed an idle connection, and the pooled client reused it.
Redis: Client id=12 addr=10.0.0.5:51234 scheduled to be closed ASAP for overcoming of output buffer limits
A client (often a slow subscriber or a replica) couldn't read data fast enough, so Redis disconnected it to protect memory.
Redis client: Error: Command timed out / redis.exceptions.TimeoutError: Timeout reading from socket
The client waited longer than its timeout for a Redis reply.
Redis: PSUBSCRIBE __keyevent@0__:expired receives nothing — notify-keyspace-events is empty
Expired/changed key events aren't published because notifications are disabled by default.
Redis: (error) ERR CONFIG SET failed (possibly related to argument 'maxmemory') - can't set immutable config
`CONFIG SET` rejected the parameter — it is immutable at runtime, invalid, or disabled by the hosting provider.
Laravel: Illuminate\Http\Client\ConnectionException: cURL error 28: Operation timed out after 30001 milliseconds with 0 bytes received
The Laravel `Http::` client waited for a response longer than its timeout and gave up.
Redis: Could not connect to Redis at 10.0.0.5:6379: Connection timed out
Redis only listens on localhost by default, so remote clients time out or are refused.
Redis: ERR max number of clients reached
Redis hit its `maxclients` limit (default 10000, lower if the OS limit is low), so new connections are refused.
Redis: (error) ERR DB index is out of range / ERR SELECT is not allowed in cluster mode
`SELECT n` used a database number the server doesn't have, or you're on Redis Cluster/managed Redis that only has DB 0.
Redis: (error) ERR This instance has cluster support disabled
A cluster command (or cluster client) was used against a standalone Redis instance.
Two steps away (33)
PHP Fatal error: Maximum execution time of 30 seconds exceeded
The script ran longer than `max_execution_time` and PHP stopped it.
Laravel/PHP 8: ErrorException: Attempt to read property "name" on null
You accessed a property on a value that is `null`, typically an empty relationship or a query that found nothing.
Laravel/PHP: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in vendor/laravel/framework
A request (or artisan job) used more memory than PHP's `memory_limit` allows.
Laravel Queue: Illuminate\Queue\MaxAttemptsExceededException: App\Jobs\SendReport has been attempted too many times or run too long
A queued job failed repeatedly or ran past its timeout, so it was marked failed.
Laravel: Symfony\Component\Console\Exception\CommandNotFoundException: Command "make:livewire" is not defined. Did you mean one of these?
`php artisan` doesn't know the command you typed — typo, missing package or an unregistered service provider.
Laravel: SQLSTATE[HY000] [2002] Connection refused (SQL: select * from sessions) / php_network_getaddresses: getaddrinfo failed
Laravel can't open a network connection to the database host and port from `.env`.
Laravel: Predis\Connection\ConnectionException: Connection refused [tcp://127.0.0.1:6379] / RedisException: Connection refused
Laravel can't connect to Redis, which it uses for cache, sessions or queues.
Redis: Error: connect ECONNREFUSED 127.0.0.1:6379 / Could not connect to Redis at 127.0.0.1:6379: Connection refused
Nothing is listening on the Redis host/port your client uses.
Kubernetes: OOMKilled (exit code 137)
The container used more memory than its limit, and the kernel killed it.
java.lang.OutOfMemoryError: Java heap space
The JVM ran out of heap memory and garbage collection couldn’t free enough.
Segmentation fault (core dumped)
A program accessed memory it wasn’t allowed to, and the kernel killed it with SIGSEGV (exit code 139).
Redis: (error) BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE
A long-running Lua script (or function) blocks the single-threaded server, so other commands are rejected.
Redis: SLOWLOG GET shows KEYS * taking 1500000 microseconds — server blocked
Redis is single-threaded; one slow command delays everything else.
redis-py: redis.exceptions.ConnectionError: Too many connections
The redis-py connection pool hit `max_connections`, and no connection was available.
Redis: ERR Can't execute 'get': only (P|S)SUBSCRIBE / (P|S)UNSUBSCRIBE / PING / QUIT / RESET are allowed in this context
A client in subscriber mode (after `SUBSCRIBE`) tried to run a normal command.
BullMQ: Error: Missing lock for job 42. moveToFinished / job stalled more than allowable limit
A BullMQ worker lost the lock on a job (it took too long or the event loop was blocked), so the job is considered stalled.
Celery: Task executed twice / Restoring unacked messages — Redis broker visibility_timeout shorter than task ETA
Celery's Redis transport redelivers a task if it isn't acknowledged within `visibility_timeout` (1 hour by default).
Laravel: .env changes ignored / env('X') returns null after php artisan config:cache
After `config:cache`, Laravel no longer reads `.env`, so `env()` calls outside config files return null and edits to `.env` have…
Redis: evicted_keys growing — keys vanish unexpectedly because maxmemory is reached and a volatile/allkeys eviction policy is active
Redis removed keys to stay under `maxmemory` according to the eviction policy.
Redis: (error) ERR unknown command 'JSON.GET', with args beginning with: / unknown command 'FT.SEARCH'
The server doesn't know the command — wrong name, newer Redis version, or a missing module.
Go: Get "https://api.example.com": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
An operation did not finish before its context deadline or HTTP client timeout.
Error response from daemon: network X not found
The container or Compose project refers to a Docker network that doesn’t exist (any more).
Error response from daemon: Pool overlaps with other one on this address space
Docker tried to create a network whose subnet clashes with an existing Docker network (or a VPN/host route).
driver failed programming external connectivity on endpoint: iptables: No chain/target/match by that name
Docker’s iptables rules were wiped (firewalld/ufw reload, iptables flush) while Docker was running, so it can’t publish ports.
Too many open files (EMFILE)
The process hit its file-descriptor limit — sockets, files and pipes all count.
fork: retry: Resource temporarily unavailable (process/thread limit)
The user or container hit its maximum number of processes/threads (ulimit -u, pids cgroup), so new processes can’t be created.
Jedis: redis.clients.jedis.exceptions.JedisException: Could not get a resource from the pool
The Jedis connection pool had no available connection within the wait time, or couldn't create one.
Redis: (error) MOVED 3999 10.0.0.6:6379 / ReplyError: MOVED 12182 192.168.0.5:7001
The key lives on another cluster node, and the client isn't cluster-aware, so it just sees the redirect.
Redis: (error) ERR wrong number of arguments for 'set' command / ERR syntax error
The command was malformed: missing/extra arguments or an unsupported option for your Redis version.
Redis: # Could not create server TCP listening socket *:6379: bind: Address already in use / *** FATAL CONFIG FILE ERROR ***
`redis-server` exits at startup because the port is taken or the config file has an error.
Redis Cluster: (error) CLUSTERDOWN Hash slot not served / The cluster is down
The cluster has hash slots that no node currently serves, so keys in those slots can't be accessed.
Redis Cluster: (error) CROSSSLOT Keys in request don't hash to the same slot
A multi-key command or transaction used keys that live in different cluster slots.
Redis::CannotConnectError: Error connecting to Redis on localhost:6379 (Errno::ECONNREFUSED)
Sidekiq or the Rails Redis cache/cable couldn't connect to Redis.
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