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====== Logging ======


On a default installation of the Big Data Service, Elasticsearch is configured to only log errors. This can be amended however...

===== Logging Level =====

Logging level is defined in the log configuration file:

  %ProgramFiles/Intelligent Plant\Big Data\es\config\logging.yml

Valid logging levels are:

^ Level ^ Description ^
| ALL | The ALL has the lowest possible rank and is intended to turn on all logging.|
| TRACE | The TRACE Level designates finer-grained informational events than the DEBUG |
| DEBUG | The DEBUG Level designates fine-grained informational events that are most useful to debug an application. |
| INFO | The INFO level designates informational messages that highlight the progress of the application at coarse-grained level. |
| WARN | The WARN level designates potentially harmful situations. |
| ERROR | The ERROR level designates error events that might still allow the application to continue running. |
| FATAL | The FATAL level designates very severe error events that will presumably lead the application to abort. |
| OFF | The OFF has the highest possible rank and is intended to turn off logging. |

**NB.** When setting a log level, note that logging can introduce a performance overhead. Also, log files are not automatically recycled and can soon generate a significant footprint.

===== Log Files =====

By default, log files are written to:
  %ProgramFiles/Intelligent Plant\Big Data\es\logs

An alternative location can be defined by setting the "path.logs" property in the elasticsearch configuration file:

  %ProgramFiles/Intelligent Plant\Big Data\es\config\logging.yml