ErrLookup › nats-io/nats-server

nats-io/nats-server

High-Performance server for NATS.io, the cloud and edge native messaging system. · Go · 132 source files

Analyzed at 3a66a489d2 on 2026-09-02. 922 documented errors.

Code / Message	Type	Severity	Tags
service import not authorized	error_code	error	nats, authorization, account-jwt, service-import
consumer write error	exception	critical	jetstream, raft, cluster, consumer
stored session does not match client ID	validation	error	mqtt, session, nats-server, storage
stream missing	exception	warning	jetstream, nats, health-check, clustering
for stream ' >	validation	critical	jetstream, raft, leaderless, catchup, cluster
`ErrBadRSAHashAlgorithm` unsupported RSA hash algorithm	error_code	error	windows, certificate-store, rsa, hash-algorithm, signing
invalid mapping destination: invalid transform	validation	error	subject-mapping, transform, config
shutting down	exception	info	jetstream, cluster, shutdown, raft
character not supported for MQTT topics	validation	error	mqtt, topic-validation, encoding
NCryptOpenStorageProvider returned	error_code	error	windows, tls, cng, keystore
`10111` rollup value invalid	validation	error	jetstream, rollup, headers, validation
remote leaf node URL	validation	error	fips, websocket, leafnode, config-validation
authorization response had validation errors	validation	error	jwt, auth-callout, validation
consumer closed	exception	warning	jetstream, consumer, cluster, leader-election
config reload does not support moving to or from an account…	validation	error	nats-server, config-reload, accounts-resolver
: invalid signature	validation	error	proxy-protocol, network, signature-validation
wrong gateway	error_code	error	nats, gateway, configuration-mismatch
`ErrInvalidArchive` archive: invalid archive stream	error_code	error	go, archive, corrupt-data, io
import forms a cycle	error_code	error	nats, account-jwt, cycle, service-import, stream-import
unsupported PROXY protocol version	validation	warning	proxy-protocol, versioning, defensive-guard
processRoutedOriginClusterMsgArgs Parse Error	validation	error
failed to be ready for connections after	exception	error
`ErrNoPrivateKeyStoreRef` unable to obtain private key handle from store	error_code	error	windows, certificate-store, private-key, ncrypt
lookup stream for account	exception	error	mqtt, jetstream, stream-lookup, configuration
unable to extract property from key	exception	error	windows, certstore, cryptoapi, private-key
unable to plug TLS verify connection, config is nil	exception	error	tls, ocsp, config, nats-server
`10071` last sequence mismatch	error_code	error	jetstream, publish, concurrency-conflict, expected-last-sequence
error parsing certificate	validation	error	tls, certificate, x509, config
server is not running	error_code	error	nats, jetstream, server-lifecycle, shutdown
config reload not supported for jetstream storage directory	validation	error	nats-server, config-reload, jetstream
failed to parse message sequence	exception	error	jetstream, restore, corruption, backup
invalid publish message, variable header exceeds remaining…	validation	error	mqtt, protocol, packet-parsing, nats-server
jetstream account not registered	exception	error	jetstream, account-lifecycle, nats-server
system account can not be in default_js_domain	validation	error	jetstream, configuration, system-account
publish deny	validation	error	config, permissions, validation, nats
could not decode avl dmap	exception	critical	jetstream, filestore, corruption, deserialization
unsupported consumer	exception	error	jetstream, cluster, version-compatibility, consumer
create retained messages stream for account	exception	error	jetstream, mqtt, stream-creation, nats-server
leaf nodes and gateways (both being defined) require a…	validation	error	leafnode, gateway, system-account, config-validation
`ErrBadSigningAlgorithm` unsupported signing algorithm	error_code	error	windows, certificate-store, signing, type-mismatch
`ErrStoreRSASigningError` unable to obtain RSA signature from store	error_code	error	windows, certificate-store, rsa, ncrypt, signing
not trusted	exception	error	nats, jwt, operator-claims, security
`ErrIncompleteEntry` archive: entry not fully written	error_code	error	go, archive, writer, protocol-violation
OCSP peer verification for client connections requires TLS…	exception	error	tls, mtls, ocsp, config, nats-server
unable to register client OCSP verification	exception	error	tls, ocsp, config, nats-server, startup
attempted to connect to wrong port	error_code	error	nats, leafnode, wrong-port, configuration
expected consumer, found	validation	error	jetstream, stream-restore, archive-format, consumer
expected state.json first	validation	error	jetstream, stream-restore, archive-format
subject has exceeded number of tokens limit	error_code	error	nats, subject, subscription, configuration
encountered panic without a token	error_code	error	config, panic, recovery
JetStream message size exceeds limits for	validation	warning	jetstream, publish, message-size, limits
mqtt authentication token not compatible with presence of…	validation	error	mqtt, config, authentication
error closing compression writer	exception	error	io, compression, filestore
invalid mapping destination: wildcard index out of range	validation	error	jetstream, subject-transform, config-validation
`10069` change to limits violates consumers	error_code	error	jetstream, stream, consumer, limits, api-error
stream assignment error	exception	error	jetstream, clustering, health-check, stream-assignment
default_js_domain contains account name	validation	error	jetstream, configuration, domain, nats-server
failed to activate stream	exception	error	jetstream, stream-restore, activation, storage
account jwt not found	exception	error	nats, jwt, resolver, configuration
account missing	error_code	error	nats, account, nil-check, service-export
operators do not allow authorization callouts to be…	validation	error	configuration, operator-mode, jwt, auth-callout
gsl: invalid subject	exception	error	nats, subject, validation, sublist
max_ack_pending must be set to -1	validation	error	jetstream, consumer-config, validation, nats
attempted to connect to route port	error_code	error	nats, configuration, wrong-port, client
failed to compress block	exception	error	filestore, compression, jetstream, go
invalid MQTT session	validation	error	mqtt, session, connection-state
invalid ocsp ca configuration	validation	error	ocsp, tls, configuration, certificate-bundle
unable to connect	exception	error	mqtt, authentication, jetstream, connection-setup
attempted to connect to gateway port	error_code	error	nats, gateway, port-misconfiguration, connection
connection rejected since minimum version required is	exception	error	nats, leafnode, version, protocol-error
Error processing trusted operator keys	exception	error
the first packet should be a CONNECT	validation	error	mqtt, protocol-violation, connection-setup
auth callout violation: auth callout response is not for…	exception	error	auth, jwt, callout, security, nats
failed to read PROXY protocol header	error_code	error	proxy-protocol, network, io, truncated-header
`ErrStoreECDSASigningError` unable to obtain ECDSA signature from store	error_code	error	windows, certificate-store, ecdsa, ncrypt, signing
store is not set up to for delete	validation	error	jwt, store, configuration
duplicates window can not be larger then server limit of	error_code	error	jetstream, stream-config, account-limits, nats
OCSP storage directory is not a directory	validation	error
can not marshal	exception	error	go, json, serialization, nats-streaming
system limit reached	exception	error	jetstream, cluster, limits, ha-assets, configuration
unsupported route compression mode	validation	error
error adding stream	exception	error	jetstream, stream-restore, stream-creation
error resolving system account	exception	critical	nats-server, system-account, resolver, startup
max_request_batch must be set if it's JetStream limits are…	validation	error	jetstream, consumer, config-validation, pull-consumer
operators require an account resolver to be configured	validation	error	nats, jwt, config-validation, operator-mode
system account not setup	error_code	error	nats, system-account, configuration, jetstream
change to limits violates consumers	validation	error	jetstream, stream-config, consumers, limits
duplicate server name	exception	error	nats, cluster, server-name, configuration
minimum version required	exception	error	nats, leafnode, version, compatibility
queue is not a valid queue	validation	error	nats, config-validation, subject
invalid mapping destination: unknown function	validation	error	subject-mapping, transform, config
JetStream cluster requires cluster name	exception	error	jetstream, nats, configuration, clustering
default sentinel must be a bearer token	validation	error	config, authentication, jwt, bearer-token
%v	error_code	error	config, panic, type-mismatch
: v1 line too long	validation	error	proxy-protocol, network, tcp, nats
failed to read v2 header	error_code	error	proxy-protocol, network, io, truncated-header
topic cannot be empty	validation	error	mqtt, protocol-validation, publish-packet
proxy is configured but remote URL	validation	error	configuration, leafnode, proxy, tls, websocket
unexpected content (account= )	exception	error
fileStore requires file storage type in config	validation	error	jetstream, storage-config, filestore, go