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https://issues.apache.org/jira/browse/LOG4J2-1232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15082116#comment-15082116
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Gary Gregory commented on LOG4J2-1232:
--------------------------------------
If what you had in mind is something like:
{noformat}
diff --git
a/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/PatternProcessor.java
b/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/PatternProcessor.java
index fbc74b4..7ec8eca 100644
---
a/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/PatternProcessor.java
+++
b/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rolling/PatternProcessor.java
@@ -99,6 +99,7 @@
final Calendar cal = Calendar.getInstance();
cal.set(currentCal.get(Calendar.YEAR), 0, 1, 0, 0, 0);
cal.set(Calendar.MILLISECOND, 0);
+ cal.setMinimalDaysInFirstWeek(1);
if (frequency == RolloverFrequency.ANNUALLY) {
increment(cal, Calendar.YEAR, increment, modulus);
nextTime = cal.getTimeInMillis();
{noformat}
That does not work. Please see the unit test
{{org.apache.logging.log4j.core.appender.rolling.PatternProcessorTest}} that is
annotated with {{@Ignored}}.
> 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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