Below is my log4j configuration file, which should be configured as follows:

• maximum 5 backups of 20 MB each
• backup at midnight regardless of the current size of the main file
• deleting logs older than 21 days

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="warn">
    <Properties>
        <Property name="basePath">${sys:user.home}/test</Property>
    </Properties>
 
    <Appenders>
        <RollingFile name="fileLogger" fileName="${basePath}/console.log" filePattern="${basePath}/console_backup/console-%d{yyyy-MM-dd}_%i.log">
            <PatternLayout>
                <pattern>%msg</pattern>
            </PatternLayout>
            <Policies>
                <CronTriggeringPolicy schedule="00 00 00 * * ?"/>
                <!-- MAKSYMALNY ROZMIAR PLIKU -->
                <SizeBasedTriggeringPolicy size="20 MB"/>
            </Policies>
            <!-- MAKSYMALNA ILOSC BACKUPOW -->
            <DefaultRolloverStrategy max="5">
                <Delete basePath="${basePath}/console_backup" >
                    <IfLastModified age="21d" />
                </Delete>
            </DefaultRolloverStrategy>
        </RollingFile>
 
    </Appenders>
    <Loggers>
        <Logger name="name.john.doe.util.gui.ConsoleOutputStream" level="info" additivity="true">
            <appender-ref ref="fileLogger" level="info" />
        </Logger>
        <Root level="info" additivity="false">
            <appender-ref ref="console" />
        </Root>
    </Loggers>
</Configuration>

According to the assumption, I would like the log backup to contain the date of the log creation, i.e. the backup was created on July 8, 2024, it should contain the name “console-2024-07-08_1.log” but it contains the date of the previous day (“console -2024-07- 07_1.log”). After changing the logging policy and replacing CronTriggeringPolicy with the <TimeBasedTriggeringPolicy interval=”1” modulate=”true”/> entry, the backup file contains the correct date. Please help me find the cause. I would like to use “CronTriggeringPolicy” because it gives me more options.
The problem is that from time to time the logger stops working, i.e. a backup is created at midnight, the main log file is created but nothing is written to it, restarting the application solves the problem.