JSON Log Formatter

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Besides ULF and ODL logging formats available also in GlassFish 4, Payara Server provides additional JSON format. With this format, every line in the log output is formatted as a JSON string. The log records can be then easily parsed by a JSON parser for further data processing.

To enable the JSON formatter using the Admin Console, just select JSON from the list of Logging Formats, either for Console or Log File:

JSON format configuration in Web Console

The following administration command will enable the JSON formatter:

asadmin> set-log-attributes com.sun.enterprise.server.logging.GFFileHandler.formatter='fish.payara.enterprise.server.logging.JSONLogFormatter'

Once the JSON formatter is enabled, the log file may look similar to this sample:

Example log file with JSON format

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