Name Default Description

type REQUIRED The appender type. Must be ``console``.

threshold ALL The lowest level of events to print to the console.

queueSize 256 The maximum capacity of the blocking queue.

discardingThreshold 51 When the blocking queue has only the capacity mentioned in

discardingThreshold remaining, it will drop events of level TRACE,

DEBUG and INFO, keeping only events of level WARN and ERROR.

If no discarding threshold is specified, then a default of queueSize / 5 is used.

To keep all events, set discardingThreshold to 0.

timeZone UTC The time zone to which event timestamps will be converted.

To use the system/default time zone, set it to ``system``.

target stdout The name of the standard stream to which events will be written.

Can be ``stdout`` or ``stderr``.

logFormat default The Logback pattern with which events will be formatted. See

the Logback_ documentation for details.

filterFactories (none) The list of filters to apply to the appender, in order, after

the thresold.

neverBlock false Prevent the wrapping asynchronous appender from blocking when its underlying queue is full.

Set to true to disable blocking.

Name Default Description

type REQUIRED The appender type. Must be ``file``.

currentLogFilename REQUIRED The filename where current events are logged.

threshold ALL The lowest level of events to write to the file.

queueSize 256 The maximum capacity of the blocking queue.

discardingThreshold 51 When the blocking queue has only the capacity mentioned in discardingThreshold

remaining, it will drop events of level TRACE, DEBUG and INFO, keeping only events

of level WARN and ERROR. If no discarding threshold is specified, then a default

of queueSize / 5 is used. To keep all events, set discardingThreshold to 0.

archive true Whether or not to archive old events in separate files.

archivedLogFilenamePattern (none) Required if ``archive`` is ``true``.

The filename pattern for archived files.

If ``maxFileSize`` is specified, rollover is size-based, and the pattern must contain ``%i`` for

an integer index of the archived file.

Otherwise rollover is date-based, and the pattern must contain ``%d``, which is replaced with the

date in ``yyyy-MM-dd`` form.

If the pattern ends with ``.gz`` or ``.zip``, files will be compressed as they are archived.

archivedFileCount 5 The number of archived files to keep. Must be greater than or equal to ``0``. Zero is a

special value signifying to keep infinite logs (use with caution)

maxFileSize (unlimited) The maximum size of the currently active file before a rollover is triggered. The value can be

expressed in bytes, kilobytes, megabytes, gigabytes, and terabytes by appending B, K, MB, GB, or

TB to the numeric value. Examples include 100MB, 1GB, 1TB. Sizes can also be spelled out, such

as 100 megabytes, 1 gigabyte, 1 terabyte.

timeZone UTC The time zone to which event timestamps will be converted.

logFormat default The Logback pattern with which events will be formatted. See

the Logback_ documentation for details.

filterFactories (none) The list of filters to apply to the appender, in order, after

the thresold.

neverBlock false Prevent the wrapping asynchronous appender from blocking when its underlying queue is full.

Set to true to disable blocking.

bufferSize 8KB The buffer size of the underlying FileAppender (setting added in logback 1.1.10). Increasing this

from the default of 8KB to 256KB is reported to significantly reduce thread contention.

Name Default Description

host localhost The hostname of the syslog server.

port 514 The port on which the syslog server is listening.

facility local0 The syslog facility to use. Can be either ``auth``, ``authpriv``,

``daemon``, ``cron``, ``ftp``, ``lpr``, ``kern``, ``mail``,

``news``, ``syslog``, ``user``, ``uucp``, ``local0``,

``local1``, ``local2``, ``local3``, ``local4``, ``local5``,

``local6``, or ``local7``.

threshold ALL The lowest level of events to write to the file.

logFormat default The Logback pattern with which events will be formatted. See

the Logback_ documentation for details.

stackTracePrefix \t The prefix to use when writing stack trace lines (these are sent

to the syslog server separately from the main message)

filterFactories (none) The list of filters to apply to the appender, in order, after

the thresold.

neverBlock false Prevent the wrapping asynchronous appender from blocking when its underlying queue is full.

Set to true to disable blocking.