List of all error codes

This page contains lists of all neo4j errors, grouped by classification.

Client errors

This is a complete list of all client error status codes Neo4j may return, and what they mean.

Status Code Description

Neo.ClientError.Cluster.NotALeader

The request cannot be processed by this server. Write requests can only be processed by the leader.

Neo.ClientError.Cluster.Routing

Unable to route the request to the appropriate server

Neo.ClientError.Database.DatabaseNotFound

The request referred to a database that does not exist.

Neo.ClientError.Database.ExistingAliasFound

The request referred to a database with an alias.

Neo.ClientError.Database.ExistingDatabaseFound

The request referred to a database that already exists.

Neo.ClientError.Fabric.AccessMode

The request could not be completed due to an access mode violation

Neo.ClientError.General.ForbiddenOnReadOnlyDatabase

This is a read-only database, writing or modifying the database is not allowed.

Neo.ClientError.General.InvalidArguments

The request contained fields that were empty or are not allowed.

Neo.ClientError.General.TransactionOutOfMemoryError

The transaction used more memory than was allowed. The maximum allowed size for a transaction can be configured with dbms.memory.transaction.max_size in the Neo4j configuration file (normally in conf/neo4j.conf or, if you are using Neo4j Desktop, found through the user interface).

Neo.ClientError.General.UpgradeRequired

This transaction required the database to be of a higher kernel version than it is. Make sure that the Neoj4 DBMS has been correctly upgraded before retrying this operation.

Neo.ClientError.General.WriteOnReadOnlyAccessDatabase

This database is in read-only mode, writing or modifying the database is not allowed.

Neo.ClientError.Procedure.ProcedureCallFailed

Failed to invoke a procedure. See the detailed error description for the exact cause.

Neo.ClientError.Procedure.ProcedureNotFound

A request referred to a procedure that is not registered with this database instance. If you are deploying custom procedures in a cluster setup, ensure all instances in the cluster have the procedure jar file deployed.

Neo.ClientError.Procedure.ProcedureRegistrationFailed

The database failed to register a procedure, refer to the associated error message for details.

Neo.ClientError.Procedure.ProcedureTimedOut

The procedure did not complete within the specified timeout. You may want to retry with a longer timeout.

Neo.ClientError.Procedure.TypeError

A procedure is using or receiving a value of an invalid type.

Neo.ClientError.Request.Invalid

The client provided an invalid request.

Neo.ClientError.Request.InvalidFormat

The client provided a request that was missing required fields or had values that are not allowed.

Neo.ClientError.Request.InvalidUsage

The client made a request but did not consume outgoing buffers in a timely fashion.

Neo.ClientError.Schema.ConstraintAlreadyExists

Unable to perform this operation because it will clash with a pre-existing constraint.

Neo.ClientError.Schema.ConstraintNotFound

The request (directly or indirectly) referred to a constraint that does not exist.

Neo.ClientError.Schema.ConstraintValidationFailed

A constraint imposed by the database was violated.

Neo.ClientError.Schema.ConstraintViolation

Added or changed index entry violates a constraint.

Neo.ClientError.Schema.ConstraintWithNameAlreadyExists

Unable to perform this operation because a constraint with that name already exists.

Neo.ClientError.Schema.EquivalentSchemaRuleAlreadyExists

Unable to perform this operation because an equivalent schema rule already exists.

Neo.ClientError.Schema.ForbiddenOnConstraintIndex

A requested operation cannot be performed on the specified index because the index is part of a constraint. If you want to drop the index, you must also drop the constraint.

Neo.ClientError.Schema.IndexAlreadyExists

Unable to perform this operation because it will clash with a pre-existing index.

Neo.ClientError.Schema.IndexMultipleFound

The request referenced an index by its schema and multiple matching indexes were found.

Neo.ClientError.Schema.IndexNotApplicable

The request did not contain the properties required by the index.

Neo.ClientError.Schema.IndexNotFound

The request (directly or indirectly) referred to an index that does not exist.

Neo.ClientError.Schema.IndexWithNameAlreadyExists

Unable to perform this operation because an index with that name already exists.

Neo.ClientError.Schema.RepeatedLabelInSchema

Unable to create an index or a constraint because the schema had a repeated label.

Neo.ClientError.Schema.RepeatedPropertyInCompositeSchema

Unable to create an index or a constraint because the schema had a repeated property.

Neo.ClientError.Schema.RepeatedRelationshipTypeInSchema

Unable to create an index or a constraint because the schema had a repeated relationship type.

Neo.ClientError.Schema.TokenNameError

An invalid name is used for a token (label, relationship type, property key). Tokens cannot be empty strings and cannot be null.

Neo.ClientError.Security.AuthenticationRateLimit

The client has provided incorrect authentication details too many times in a row.

Neo.ClientError.Security.AuthorizationExpired

The stored authorization info has expired. Please reconnect.

Neo.ClientError.Security.CredentialsExpired

The credentials have expired and need to be updated.

Neo.ClientError.Security.Forbidden

An attempt was made to perform an unauthorized action.

Neo.ClientError.Security.TokenExpired

The auth provider token has expired.

Neo.ClientError.Security.Unauthorized

The client is unauthorized due to authentication failure.

Neo.ClientError.Statement.AccessMode

The request could not be completed due to an access mode violation.

Neo.ClientError.Statement.ArgumentError

The statement is attempting to perform operations using invalid arguments.

Neo.ClientError.Statement.ArithmeticError

Invalid use of arithmetic, such as dividing by zero.

Neo.ClientError.Statement.ConstraintVerificationFailed

A constraint imposed by the statement is violated by the data in the database.

Neo.ClientError.Statement.EntityNotFound

The statement refers to a non-existent entity.

Neo.ClientError.Statement.ExternalResourceFailed

Access to an external resource failed.

Neo.ClientError.Statement.NotSystemDatabaseError

This is an administration command and it should be executed against the system database.

Neo.ClientError.Statement.ParameterMissing

The statement refers to a parameter that was not provided in the request.

Neo.ClientError.Statement.PropertyNotFound

The statement refers to a non-existent property.

Neo.ClientError.Statement.RuntimeUnsupportedError

This query is not supported by the chosen runtime.

Neo.ClientError.Statement.SemanticError

The statement is syntactically valid but expresses something that the database cannot do.

Neo.ClientError.Statement.SyntaxError

The statement contains invalid or unsupported syntax.

Neo.ClientError.Statement.TypeError

The statement is attempting to perform operations on values with types that are not supported by the operation.

Neo.ClientError.Statement.UnsupportedAdministrationCommand

This administration command is not supported.

Neo.ClientError.Statement.UnsupportedOperationError

This query performed an operation that is not supported in this context.

Neo.ClientError.Transaction.ForbiddenDueToTransactionType

The transaction is of the wrong type to service the request. For instance, a transaction that has had schema modifications performed in it cannot be used to subsequently perform data operations, and vice versa.

Neo.ClientError.Transaction.InvalidBookmark

The supplied bookmark cannot be interpreted. You should only supply a bookmark that was previously generated by Neo4j. Maybe you have generated your own bookmark, or modified a bookmark since it was generated by Neo4j.

Neo.ClientError.Transaction.InvalidBookmarkMixture

Mixing bookmarks generated by different databases is forbidden. You should only chain bookmarks that are generated from the same database. You may however chain bookmarks generated from the system database with bookmarks from another database.

Neo.ClientError.Transaction.LockClientStopped

The transaction has been terminated, so no more locks can be acquired. This may occur because the transaction ran longer than the configured transaction timeout, a human operator manually terminated the transaction, or the database shut down.

Neo.ClientError.Transaction.Terminated

Explicitly terminated by the user.

Neo.ClientError.Transaction.TransactionAccessedConcurrently

There were concurrent requests accessing the same transaction, which is not allowed.

Neo.ClientError.Transaction.TransactionHookFailed

Transaction hook failure.

Neo.ClientError.Transaction.TransactionMarkedAsFailed

The transaction was marked as both successful and failed. Because failure takes precedence, the transaction was rolled back.

Neo.ClientError.Transaction.TransactionNotFound

The request referred to a transaction that does not exist.

Neo.ClientError.Transaction.TransactionTimedOut

The transaction has not completed within the specified timeout (dbms.transaction.timeout). You may want to retry with a longer timeout.

Neo.ClientError.Transaction.TransactionValidationFailed

Transaction changes did not pass validation checks.

Transient errors

This is a complete list of all transient error status codes Neo4j may return, and what they mean.

Status Code Description

Neo.TransientError.Cluster.ReplicationFailure

Replication failure.

Neo.TransientError.Database.DatabaseUnavailable

The database is not currently available to serve your request, refer to the database logs for more details. Retrying your request at a later time may succeed.

Neo.TransientError.General.MemoryPoolOutOfMemoryError

The memory pool limit was exceeded. The corresponding setting can be found in the error message.

Neo.TransientError.General.OutOfMemoryError

There is not enough memory to perform the current task. Please try increasing dbms.memory.heap.max_size in the Neo4j configuration file (normally in conf/neo4j.conf or, if you are using Neo4j Desktop, found through the user interface).

If you are running an embedded installation, you can increase the heap by using the -Xmx command line flag, and then restart the database.

Neo.TransientError.General.StackOverFlowError

There is not enough stack size to perform the current task. This is generally considered to be a database error, so please contact Neo4j support.

You could try increasing the stack size; for example to set the stack size to 2M, add dbms.jvm.additional=-Xss2M to in the Neo4j configuration file (normally in conf/neo4j.conf or, if you are using Neo4j Desktop, found through the user interface).

If you are running an embedded installation, you can add -Xss2M as command line flag.

Neo.TransientError.General.TransactionMemoryLimit

There is not enough memory to perform the current task. Please try increasing dbms.memory.off_heap.max_size in the Neo4j configuration file (normally in conf/neo4j.conf or, if you are using Neo4j Desktop, found through the user interface), and then restart the database.

Neo.TransientError.Request.NoThreadsAvailable

There are no available threads to serve this request at the moment. You can retry at a later time, or consider increasing max thread pool size for bolt connector(s).

Neo.TransientError.Security.AuthProviderFailed

An auth provider request failed.

Neo.TransientError.Security.AuthProviderTimeout

An auth provider request timed out.

Neo.TransientError.Security.ModifiedConcurrently

The user was modified concurrently to this request.

Neo.TransientError.Statement.ExecutionTimeout

The database was unable to execute the statement in a timely fashion.

Neo.TransientError.Transaction.BookmarkTimeout

Bookmark wait timed out. Database has not reached the specified version.

Neo.TransientError.Transaction.ConstraintsChanged

Database constraints changed since the start of this transaction.

Neo.TransientError.Transaction.DeadlockDetected

This transaction, and at least one more transaction, has acquired locks in a way that it will wait indefinitely, and the database has aborted it. Retrying this transaction will most likely be successful.

Neo.TransientError.Transaction.Interrupted

Interrupted while waiting.

Neo.TransientError.Transaction.LeaseExpired

The lease under which this transaction was started is no longer valid.

Neo.TransientError.Transaction.LockAcquisitionTimeout

Unable to acquire lock within configured timeout (dbms.lock.acquisition.timeout).

Neo.TransientError.Transaction.MaximumTransactionLimitReached

Unable to start new transaction since the maximum number of concurrently executing transactions is reached (dbms.transaction.concurrent.maximum). You can retry at a later time or consider increasing allowed maximum of concurrent transactions.

Neo.TransientError.Transaction.Outdated

Transaction has seen state which has been invalidated by applied updates while the transaction was active. Transaction may succeed if retried.

Database error

This is a complete list of all database error status codes Neo4j may return, and what they mean.

Status Code Description

Neo.DatabaseError.Database.DatabaseLimitReached

The limit to number of databases has been reached.

Neo.DatabaseError.Database.UnableToStartDatabase

Unable to start database.

Neo.DatabaseError.Database.Unknown

Unknown database management error.

Neo.DatabaseError.Fabric.RemoteExecutionFailed

The database was unable to execute a remote part of the statement.

Neo.DatabaseError.General.IndexCorruptionDetected

The request (directly or indirectly) referred to an index that is in a failed state. The index needs to be dropped and recreated manually.

Neo.DatabaseError.General.SchemaCorruptionDetected

A malformed schema rule was encountered. Please contact your support representative.

Neo.DatabaseError.General.StorageDamageDetected

Expected set of files not found on disk. Please restore from backup.

Neo.DatabaseError.General.UnknownError

An unknown error occurred.

Neo.DatabaseError.Schema.ConstraintCreationFailed

Creating a requested constraint failed.

Neo.DatabaseError.Schema.ConstraintDropFailed

The database failed to drop a requested constraint.

Neo.DatabaseError.Schema.IndexCreationFailed

Failed to create an index.

Neo.DatabaseError.Schema.IndexDropFailed

The database failed to drop a requested index.

Neo.DatabaseError.Schema.LabelAccessFailed

The request accessed a label that did not exist.

Neo.DatabaseError.Schema.PropertyKeyAccessFailed

The request accessed a property that does not exist.

Neo.DatabaseError.Schema.RelationshipTypeAccessFailed

The request accessed a relationship type that does not exist.

Neo.DatabaseError.Schema.SchemaRuleAccessFailed

The request referred to a schema rule that does not exist.

Neo.DatabaseError.Schema.SchemaRuleDuplicateFound

The request referred to a schema rule that is defined multiple times.

Neo.DatabaseError.Schema.TokenLimitReached

The maximum number of tokens of this type has been reached, no more tokens of this type can be created.

Neo.DatabaseError.Statement.ExecutionFailed

The database was unable to execute the statement.

Neo.DatabaseError.Statement.RemoteExecutionFailed

The database was unable to execute a remote part of the statement.

Neo.DatabaseError.Transaction.LinkedTransactionError

The transaction was terminated because another transaction executing the same query encountered an error.

Neo.DatabaseError.Transaction.TransactionCommitFailed

The database was unable to commit the transaction.

Neo.DatabaseError.Transaction.TransactionLogError

The database was unable to write transaction to log.

Neo.DatabaseError.Transaction.TransactionRollbackFailed

The database was unable to roll back the transaction.

Neo.DatabaseError.Transaction.TransactionStartFailed

The database was unable to start the transaction.