13.2.1. General logging

This section describes Neo4j general log files, error messages, and severity levels.

13.2.1.1. Log files

The following table describes the Neo4j general log files, which can be found in the /log folder, and the information they contain.

Filename Description

neo4j.log

The standard log, where general information about Neo4j is written. Not written for Debian and RPM packages.

debug.log

Information useful when debugging problems with Neo4j.

http.log

Request log for the HTTP API.

gc.log

Garbage Collection logging provided by the JVM.

query.log

Log of executed queries that takes longer than a specified threshold.

security.log

Log of security events.

service-error.log

(Windows) Log of errors encountered when installing or running the Windows service.

13.2.1.2. Error messages

The following table lists all messages raised by Neo4j and their severity level.

Message type Severity level Description

INFO

Low severity

Report status information and errors that are not severe.

DEBUG

Low severity

Report details on the raised errors and possible solutions.

WARN

Low severity

Report errors that need attention but are not severe.

ERROR

High severity

Report errors that prevent the Neo4j server from running and must be addressed immediately.