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https://issues.apache.org/jira/browse/LOG4J2-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15072738#comment-15072738
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Nikolai commented on LOG4J2-1232:
---------------------------------
Problem in method
{{org.apache.logging.log4j.core.appender.rolling.PatternProcessor#getNextTime}}
In branch {{if (frequency == RolloverFrequency.WEEKLY)}} value of
{{currentCal.get(Calendar.WEEK_OF_YEAR)}} is 1!
See {{java.util.Calendar#setMinimalDaysInFirstWeek}}
> Incorrect log rotation in last week of year
> -------------------------------------------
>
> Key: LOG4J2-1232
> URL: https://issues.apache.org/jira/browse/LOG4J2-1232
> Project: Log4j 2
> Issue Type: Bug
> Affects Versions: 2.3, 2.5
> Reporter: Nikolai
> Priority: Critical
>
> I have log4j2.xml configuration with several log-files definitions like:
> {code:xml}
> <RollingRandomAccessFile name="FIX_MESSAGES_FILE_MARKET_DATA"
> fileName="logs/market_data_msg.log"
>
> filePattern="logs/market_data_msg.log-%d{yyyy-MM-'W'W}"
> immediateFlush="false">
> <PatternLayout pattern="%m%n"/>
> <Policies>
> <TimeBasedTriggeringPolicy/>
> </Policies>
> </RollingRandomAccessFile>
> {code}
> Today (2015-12-28) all log files suddenly become almost empty. Reason in
> permanent rotation current log file in file "market_data_msg.log-2014-12-W5"
> (wrong year). As result of permanent rotation both files contains only 0 or 1
> lines and information is lost!
> Obviously, the problem related with the fact that today started last week of
> the year.
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