# Logging

Apache ActiveMQ Artemis uses the JBoss Logging framework to do its logging and is
configurable via the `logging.properties` file found in the `etc` directory. This
is configured by default to log to both the console and to a file.

There are a handful of general loggers available:

Logger | Description
---|---
org.jboss.logging|Logs any calls not handled by the Apache ActiveMQ Artemis loggers
org.apache.activemq.artemis.core.server|Logs the core server
org.apache.activemq.artemis.utils|Logs utility calls
org.apache.activemq.artemis.journal|Logs Journal calls
org.apache.activemq.artemis.jms|Logs JMS calls
org.apache.activemq.artemis.integration.bootstrap|Logs bootstrap calls
org.apache.activemq.audit.base|audit log. Disabled by default
org.apache.activemq.audit.resource|resource audit log. Disabled by default
org.apache.activemq.audit.message|message audit log. Disabled by default

## Activating TRACE for a specific logger

Sometimes it is necessary to get more detailed logs from a particular logger. For
example, when you're trying to troublshoot an issue. Say you needed to get TRACE
logging from the logger `org.foo`. First you would need to add `org.foo` to the
`loggers` list at the top of `logging.properties`, e.g.:

```
loggers=...,org.foo
```

Then you need to configure the logging level for the `org.foo` logger to `TRACE`,
e.g.:

```
logger.org.foo.level=TRACE
```

Lastly, you would need to update the `level` of the necessary `handler` to allow
the `TRACE` logging through, e.g.:

```
handler.CONSOLE.level=TRACE
```
or
```
handler.FILE.level=TRACE
```

## Logging in a client or with an Embedded server

Firstly, if you want to enable logging on the client side you need to
include the JBoss logging jars in your library. If you are using Maven
the simplest way is to use the "all" client jar.

```xml
<dependency>
   <groupId>org.jboss.logmanager</groupId>
   <artifactId>jboss-logmanager</artifactId>
   <version>2.1.10.Final</version>
</dependency>
<dependency>
   <groupId>org.apache.activemq</groupId>
   <artifactId>activemq-core-client-all</artifactId>
   <version>2.14.0</version>
</dependency>
```

There are 2 properties you need to set when starting your java program,
the first is to set the Log Manager to use the JBoss Log Manager, this
is done by setting the `-Djava.util.logging.manager` property i.e.
`-Djava.util.logging.manager=org.jboss.logmanager.LogManager`

The second is to set the location of the logging.properties file to use,
this is done via the `-Dlogging.configuration` for instance
`-Dlogging.configuration=file:///home/user/projects/myProject/logging.properties`.

> **Note:**
>
> The `logging.configuration` system property needs to be valid URL

The following is a typical `logging.properties` for a client

```
# Root logger option
loggers=org.jboss.logging,org.apache.activemq.artemis.core.server,org.apache.activemq.artemis.utils,org.apache.activemq.artemis.journal,org.apache.activemq.artemis.jms,org.apache.activemq.artemis.ra

# Root logger level
logger.level=INFO
# Apache ActiveMQ Artemis logger levels
logger.org.apache.activemq.artemis.core.server.level=INFO
logger.org.apache.activemq.artemis.utils.level=INFO
logger.org.apache.activemq.artemis.jms.level=DEBUG

# Root logger handlers
logger.handlers=FILE,CONSOLE

# Console handler configuration
handler.CONSOLE=org.jboss.logmanager.handlers.ConsoleHandler
handler.CONSOLE.properties=autoFlush
handler.CONSOLE.level=FINE
handler.CONSOLE.autoFlush=true
handler.CONSOLE.formatter=PATTERN

# File handler configuration
handler.FILE=org.jboss.logmanager.handlers.FileHandler
handler.FILE.level=FINE
handler.FILE.properties=autoFlush,fileName
handler.FILE.autoFlush=true
handler.FILE.fileName=activemq.log
handler.FILE.formatter=PATTERN

# Formatter pattern configuration
formatter.PATTERN=org.jboss.logmanager.formatters.PatternFormatter
formatter.PATTERN.properties=pattern
formatter.PATTERN.pattern=%d{HH:mm:ss,SSS} %-5p [%c] %s%E%n
```

## Configuring Audit Logging

There are 3 audit loggers that can be enabled separately and audit sifferent types of events, these are:

1. Base logger: This is a highly verbose logger that will capture most events that occur on JMX beans
2. Resource logger: This logs creation, updates and deletion of resources such as Addresses and Queues and also authentication, the main purpose of this is to track console activity and access to broker.
3. Message logger: this logs message production and consumption of messages and will have a potentially negatibve affect on performance

These are disabled by default in the logging.properties configuration file:

```$xslt
logger.org.apache.activemq.audit.base.level=ERROR
logger.org.apache.activemq.audit.base.handlers=AUDIT_FILE
logger.org.apache.activemq.audit.base.useParentHandlers=false

logger.org.apache.activemq.audit.resource.level=ERROR
logger.org.apache.activemq.audit.resource.handlers=AUDIT_FILE
logger.org.apache.activemq.audit.resource.useParentHandlers=false

logger.org.apache.activemq.audit.message.level=ERROR
logger.org.apache.activemq.audit.message.handlers=AUDIT_FILE
logger.org.apache.activemq.audit.message.useParentHandlers=false
...
```

To enable the audit log change the above level to INFO, like this:
```$xslt
logger.org.apache.activemq.audit.base.level=INFO
logger.org.apache.activemq.audit.base.handlers=AUDIT_FILE
logger.org.apache.activemq.audit.base.useParentHandlers=false
...
```

The 3 audit loggers can be disable/enabled separately. 

Once enabled, all audit records are written into a separate log
file (by default audit.log).

### Logging the clients remote address

It is possible to configure the audit loggers to log the remote address of any calling clients either through normal 
clients or through the console and JMX. This is configured by enabling a specific login module in the login config file. 
```$xslt
org.apache.activemq.artemis.spi.core.security.jaas.AuditLoginModule optional
       debug=false;
```


> **Note:**
>
> This needs to be the first entry in the login.config file

> **Note:**
>
> This login module does no authentication, it is used only to catch client information through which ever path a client takes


## Use Custom Handlers

To use a different handler than the built-in ones, you either pick one from
existing libraries or you implement it yourself. All handlers must extends the
java.util.logging.Handler class.

To enable a custom handler you need to append it to the handlers list
`logger.handlers` and add its configuration to the `logging.configuration`.

Last but not least, once you get your own handler please [add it to the boot
classpath](using-server.md#adding-bootstrap-dependencies) otherwise the log
manager will fail to load it!
