You can choose the types of messages that you want to log for a collection and for the system, specify options for creating and viewing log files, receiving alerts, and receiving email about messages.
During normal operations, the components write log messages to a common log file. This log file is in the ES_NODE_ROOT/logs directory on the controller server. You can use the administration console to view this common log data.
If a problem occurs, such as a network communication failure, the components write log messages to a logs directory on the server where the component is installed. To view these local log files, use a file viewer on that computer, such as the tail utility on a UNIX system. You cannot use the administration console to view these types of log files.
When you configure log files, you can choose the types of messages that you want to log (such as error or warning messages), specify how often old log files are to be discarded to make room for new log files, specify a maximum size for the log files, and select the language of the messages. You can also specify options for receiving email whenever certain events occur, or whenever certain messages or types of messages are logged.
When you monitor log files, you can choose which log file you want to open. You can filter the content of the log file so that you view only messages of a specific severity level (such as error messages only) or messages that were produced by a specific session. When you view a log file, you can view details about individual messages. For example, you might want to see the name of the function that produced the message and other information that can help you take corrective action, if necessary.
