João Santos created LOG4J2-1906:
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Summary: DirectWriteRolloverStrategy not properly creating files
Key: LOG4J2-1906
URL: https://issues.apache.org/jira/browse/LOG4J2-1906
Project: Log4j 2
Issue Type: Bug
Affects Versions: 2.8.2
Reporter: João Santos
The DirectWriteRolloverStrategy is not properly determining the filename of the
new log file after the rollover happens.
With the following configuration:
{noformat}
<RollingFile name="ApplicationLog"
filePattern="application.log.%d{yyyy-MM-dd-HH-mm}">
<PatternLayout>
<Pattern>%m%n</Pattern>
</PatternLayout>
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy />
</Policies>
<DirectWriteRolloverStrategy />
</RollingFile>
{noformat}
What is happening is, for instance:
- at instant 09h35m55s the rollover is set to happen at 09h36m00s, log line is
written to application.log.2017-05-10-09-35} - OK
- at instant 09h36m05s a new log is written and the rollover is triggered,
after the rollover logs are written to application.log.2017-05-10-09-35} - Not
OK
- at instant 09h37m05s a new log is written and the rollover is triggered,
after the rollover logs are written to application.log.2017-05-10-09-36} - Not
OK
This seems to be happening because
DirectWriteRolloverStrategy.getCurrentFileName is calling the
PatternProcessor.formatFileName and telling it to use the currentTime. However,
currentFileTime is zero, and it will fallback to the prevFileTime to determine
the filename, which is wrong as it will be one minute before current time.
It should probably either use the nextFileTime (while debugging I could see
that it was set to the correct time, the minute I expect the file to rollover),
or use the System time.
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