log4j:WARN No appenders could be found for logger (org.apache.flume.node.PollingPropertiesF

log4j:WARN No appenders could be found for logger (org.apache.flume.node.PollingPropertiesFileConfigurationProvider).
This warning message indicates that the log4j framework was unable to find any appenders configured for the specified logger. An appender is responsible for outputting log messages to a specific destination, such as a file, console, or database.

To resolve this issue, you need to configure an appender for the logger mentioned in the warning message. This can be done by adding an appropriate appender configuration to your log4j configuration file. The configuration file is typically named log4j.properties or log4j.xml and should be present in your application's classpath.

Here is an example of a basic appender configuration for writing logs to a file:

log4j.rootLogger=INFO, file

log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=/path/to/log/file.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d [%t] %-5p %c - %m%n

In this example, the `log4j.rootLogger` sets the logging level to INFO and associates it with the `file` appender. The `file` appender is configured to write logs to the specified file path (`/path/to/log/file.log`) using the specified layout pattern.

Make sure to adjust the file path and other settings according to your requirements. Once you have added the appender configuration, restart your application, and the warning should no longer appear.