[jira] [Created] (LOG4J2-3630) Unable to prevent file renames during rollovers

["Srijeet Chatterjee (Jira)" <ji...@apache.org>]

Srijeet Chatterjee created LOG4J2-3630:
------------------------------------------

             Summary: Unable to prevent file renames during rollovers
                 Key: LOG4J2-3630
                 URL: https://issues.apache.org/jira/browse/LOG4J2-3630
             Project: Log4j 2
          Issue Type: Bug
          Components: Configuration
            Reporter: Srijeet Chatterjee


We have an app that's using log4j2 for logging. The file that we want to be logging to is 
{code:java}
access.log
{code}
The current log4j2 config causes it to rename {{access.log}} to {{access.log.2022-01-30-30}} (for example) then recreate the {{access.log}} file. This can cause data loss problems for log forwarding tools that expect to tail the same log file without having it change out from underneath them.

I have tried playing around with the `DirectWriteRolloverStrategy` attribute, but by using that, I lose the ability to start with a specified `fileName`, because this policy doesn't support the `fileName` parameter. Hence, we'd lose the ability to log to `access.log`. 
Is there a way around this? 

Desired behavior:



Current logging always goes to `access.log`.

The files rollover based on the strategy specified in my log4j2 config file.

Renames do not happen for the current file.

Here's my current config file:
{code:java}
<?xml version='1.0' encoding='utf-8'?>
<Configuration>
    <Appenders>
        <Console name="stdout" target="SYSTEM_OUT">
            <PatternLayout pattern="%m%n" />
        </Console>
        <RollingFile name="traffic_router_access"
                     fileName="access.log"
                     filePattern="access.log.%i" >
            <PatternLayout pattern="%m%n" />
            <Policies>
                <SizeBasedTriggeringPolicy size="10KB"/>
            </Policies>
            <DirectWriteRolloverStrategy maxFiles="10"/>
            <ThresholdFilter level="INFO" />
        </RollingFile>
    </Appenders>
    <Loggers>
        <Logger name="org.apache.traffic_control.traffic_router.core.access" level="INFO" additivity="false" >
            <AppenderRef ref="traffic_router_access" />
        </Logger>
        <Root level="WARN" additivity="false" >
            <AppenderRef ref="stdout" />
        </Root>
    </Loggers>
</Configuration> {code}



--
This message was sent by Atlassian Jira
(v8.20.10#820010)