nodetool setlogginglevel 

Set the log level for a service.

Set the log level for a service.

Synopsis 

$ nodetool <options> setlogginglevel -- <class> <level>
Options
Short Long Description
-h --host Hostname or IP address.
-p --port Port number.
-pwf --password-file Password file path.
-pw --password Password.
-u --username Remote JMX agent username.
class The class for changing the level, a fully qualified domain name such as org.apache.cassandra.service.StorageProxy.
level Logging level, for example DEBUG.
-- Separates an option from an argument that could be mistaken for a option.

Description 

You can use this command to set logging levels for services instead of modifying the logback-text.xml file. The following values are valid for the logger class qualifier:
  • org.apache.cassandra
  • org.apache.cassandra.db
  • org.apache.cassandra.service.StorageProxy
The possible log levels are:
  • ALL
  • TRACE
  • DEBUG
  • INFO
  • WARN
  • ERROR
  • OFF

If both class qualifier and level arguments to the command are empty or null, the command resets logging to the initial configuration.

Example 

This command sets the StorageProxy service to debug level.

$ nodetool setlogginglevel org.apache.cassandra.service.StorageProxy DEBUG
Note: Cassandra 3.0 and later support extended logging for Compaction. This utility must be configured as part of the table configuration. The extended compaction logs are stored in a separate file. For details, see Enabling extended compaction logging.