ErrLookup › MassTransit/MassTransit

MassTransit/MassTransit

Distributed Application Framework for .NET · C# · 4,420 source files

Analyzed at 62ab339afa on 2026-09-13. 824 documented errors.

Code / MessageTypeSeverityTags
Invalid property type
exception error azure-table, saga, type-conversion, argumentexception, persistence
Failed to create SendEndpointConverter
exception error reflection, internal-invariant, masstransit, converter-cache
Could not create consumer registration
exception error masstransit, test-harness, reflection, activator-createinstance
context
validation error argumentexception, outbox, masstransit, configuration
The configurator must be a consumer specification
exception error dependency-injection, masstransit, batch-consumer, interface-cast
The settings are no longer configured in the container.
exception error masstransit, dependency-injection, endpoint-definition, dotnet
MessageTypeCache<T>.InvalidMessageTypeReason
exception error masstransit, csharp, dependency-injection, message-contract, configuration
No bus instances found
exception error masstransit, dependency-injection, test-harness, configuration
Value cannot be null. (Parameter 'context')
exception error masstransit, dependency-injection, null-argument, consumer-registration
DbContextMissingConstructor
exception error masstransit, efcore, saga, reflection, constructor
Multiple documents were modified: {result.ModifiedCount}
exception error mongodb, courier, routing-slip, data-integrity, duplicate-data
The bucket limit has been reached, the cache is dead.
exception critical overflow, cache-exhaustion, long-running-process, masstransit
The interface must be a generic interface definition: {TypeC
exception error reflection, invalid-argument, generics, masstransit
An exception occurred creating the BrokeredMessageReceiver
exception error masstransit, azure-service-bus, configuration, receiver
Write was not acknowledged
exception error mongodb, write-concern, courier, routing-slip, persistence
Exception creating proxy ({typeName}) for {TypeCache.GetShor
exception error reflection, proxy-generation, masstransit, message-contract
Illegal characters for this position: '{sub.ToString()}'
validation error cron, formatexception, scheduling, masstransit
The bus topology is required to use ScheduleRecurringPublish
exception error masstransit, scheduling, configuration, invalid-operation
Failed to create ResponseEndpointConverter
exception error reflection, internal-invariant, masstransit, converter-cache
Message Lock Lost: {_message.LockId}
exception error masstransit, sql-transport, concurrency, lock, distributed
Must add at least 1 condition to a condition block.
exception error masstransit, testing, bus-activity-monitor, argument-validation
collectionName
exception error argument-null, cosmos, saga-repository, configuration
The interface type must be an interface:
exception error reflection, invalid-argument, csharp, masstransit
context.CancellationToken
exception warning masstransit, cancellation, batching, shutdown
Value cannot be null. (Parameter 'repository')
validation error masstransit, messagedata, null-argument, configuration
The repository does not support Load operations
exception error masstransit, testing, saga, test-harness
The consumer type did not match the connector type
exception error masstransit, consumer-registration, batching, type-safety
Could not find time zone with id {id}, consider using Quartz
exception error timezone, scheduling, quartz, masstransit
Unexpected message type:
exception error masstransit, publish, argumentexception, type-mismatch
NotSupported.Assign_Target
Assignment target `{nodeType}` is not supported
exception error expression-tree, reflection, not-supported, il-emit
Saga update failed
exception error dynamodb, saga, persistence, masstransit, aws
Saga version conflict
exception error dynamodb, saga, concurrency, optimistic-locking, persistence
Cannot check an empty condition.
exception error masstransit, testing, bus-activity-monitor, invalid-state
NotSupported.NewArrayInit_MultidimensionalArray
NewArrayInit_MultidimensionalArray
exception error expression-tree, compiler, not-supported, arrays
A JSON serialization exception occurred while deserializing
exception error serialization, json, masstransit, newtonsoft, deserialization
Host was not an IInMemoryHost
exception error masstransit, type-mismatch, inmemory-transport, host
Only a single consumer can be connected to a queue: {Name}
validation error messaging, queue, consumer
interfaceType
exception error reflection, null-argument, csharp, masstransit
DisposeAsync
exception error async-dispose, exception-wrapping, resource-cleanup
The type is not a future: {TypeCache.GetShortName(futureType
exception error masstransit, future, saga, di-registration
Value cannot be null. (Parameter 'messageType')
exception error masstransit, argument-null, scheduling, csharp
CorrelationId not present, define the routing slip using Eve
exception error
'{methodName}' can be called only once.
exception error masstransit, dependency-injection, configuration, bus-configuration
The consumer definition was not a FutureConsumerDefinition:
exception error masstransit, futures, type-mismatch, configuration
AddMassTransit() was already called and may only be called o
exception error masstransit, dependency-injection, configuration, duplicate-registration
DeclaringType is null
exception error reflection, invalid-argument, masstransit
{TypeCache.GetShortName(activityDefinitionType)} is not an a
exception error masstransit, activity-registration, argument-validation, generic-type-mismatch
Invalid SendContext<T> type
exception error masstransit, sql-transport, send-context, type-mismatch
Producer for topic: {topic} is not configured for ${typeof(M
exception error kafka, masstransit, configuration, producer-not-configured
An exception occurred while deserializing the message envelo
exception error serialization, json, masstransit, deserialization, envelope
The cancellationToken must support cancellation
exception error cancellation, invalid-argument, async, masstransit
Value cannot be null. (Parameter 'pipe')
validation error masstransit, null-argument, scheduling, argument-validation
The type must have a valid namespace
exception error reflection, argument-validation, assembly-scanning
The default bus instance is not an InMemory Bus Instance
exception error masstransit, dependency-injection, transport-mismatch, scheduler
The dependency graph contains cycles:
exception error dependency-graph, cycle, configuration, masstransit
DynamoDb saga repository does not support queries
exception error dynamodb, saga, unsupported-operation, masstransit, query
MessageData content not found: {blob.BlobContainerName}/{blo
exception error azure-blob-storage, message-data, not-found, masstransit
The settings were already computed
exception error masstransit, configuration, job-service, dependency-injection
Work posted to the synchronization context did not complete
exception error masstransit, synchronization-context, shutdown-timeout, concurrency
Azure Table repository does not support queries
exception error azure-table-storage, saga, not-implemented, masstransit
Could not combine the expression
exception error expression, saga, state-machine, masstransit
Message data repository was not available:
exception error masstransit, message-data, missing-registration, configuration
The exception type {exception.GetType().Name} did not match
exception error saga, state-machine, exception-handling, generics
The message envelope was not found.
exception error masstransit, serialization, encryption, deserialization
The saga does not have a public constructor with a single Gu
exception error saga, reflection, configuration, constructor
Azure Service Bus Test Options must be configured before cal
exception error azure-service-bus, testing, configuration, di-ordering
NotSupported.MemberInit_MemberBinding|NotSupported.MemberInit_ListBinding
MemberInit_MemberBinding or MemberInit_ListBinding
exception error expression-tree, compiler, not-supported, member-init
Value cannot be null. (ArgumentNullException: selector)
exception error masstransit, mongodb, null-check, message-data
The interface type is not implemented by:
exception error reflection, invalid-argument, generics, masstransit
An index with the same name was already added: {name}
exception error duplicate-key, cache-configuration, masstransit, argument-validation
No serializer content type specified and more than one seria
exception error masstransit, serialization, configuration, ambiguous-default
An existing saga instance was not found
exception error saga, correlation-id, state-machine, message-ordering
ArgumentNullException: _dbContext.TransactionId
exception critical mongodb, outbox, transactions, null-argument
The saga type did not match the connector type
exception error masstransit, saga, generics, type-mismatch
An exception occurred during bus creation
exception critical bus-creation, configuration, wrapping-exception
An address for publishing message type {TypeCache<T>.ShortNa
exception error masstransit, publish, message-topology, configuration
Consumer is excluded from ConfigureEndpoints
exception error masstransit, configuration, endpoint, consumer
Failed to serialize message
exception error masstransit, json, serialization
Value cannot be null. (Parameter 'specification')
validation error null-argument, rabbitmq, topology, masstransit
The entity name must not be null or empty
validation error azure-service-bus, masstransit, argument-validation, configuration
The future instance was not found for the specified future i
exception error
The hostConfiguration was not properly configured for Azure
exception error masstransit, azure-servicebus, configuration, type-mismatch
Value cannot be null. (Parameter 'instancePipe')
exception error masstransit, null-argument, middleware, consumer-pipeline
Context has no envelope.
exception error messagepack, serialization, invalid-state, envelope
Kafka is a producer, not an outbox compatible transport
exception error masstransit, kafka, outbox, not-implemented
No default content type specified and more than one deserial
exception error masstransit, serialization, configuration, ambiguous-default
Cannot jump, no labels found for the target `{expr.Target}`
exception error expression-tree, compiler, goto, invariant
Connection is already closed: {CloseReason}
exception error rabbitmq, masstransit, connection, network, transient
Message List was empty, or timed out
exception error masstransit, testing, test-harness, async-enumerable
Node type not supported.
exception error dapper, expression-tree, sql-generation, unsupported-operation, saga
Routing Slip Request variable was not found: {RoutingSlipReq
exception error masstransit, courier, routing-slip, missing-variable
Simulated Delivery Failure Requested
exception warning masstransit, outbox, test-hook, simulated-failure
The interface type must be an open generic interface:
exception error invalid-argument, generics, reflection, dotnet
A valid ConsumeContext was not available
exception warning masstransit, consume-context, correlation, middleware
Invalid day of month.
validation error argument-out-of-range, masstransit, scheduling, validation
The InstanceState was not configured, and could not be autom
exception error saga, state-machine, configuration, masstransit
The key already exists and is not a scope collection: {key}
exception error masstransit, introspection, invalid-state
The repository does not support Query operations
exception error masstransit, testing, saga, query
The scheme did not match the expected value: {Scheme}
exception error mongodb, uri, message-data, scheme-mismatch
The operation was canceled by the consumer: {TypeCache<TCons
exception error masstransit, cancellation, timeout