Rene Schoenlein created LOG4J2-679:
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Summary: Log rotation partly failed with error: "Unable to create
directory ..."
Key: LOG4J2-679
URL: https://issues.apache.org/jira/browse/LOG4J2-679
Project: Log4j 2
Issue Type: Bug
Components: Appenders
Affects Versions: 2.0-rc1
Environment: JDK 1.6, tomcat 6,
Reporter: Rene Schoenlein
Priority: Critical
Log rotation partly failed with error: "Unable to create directory ..."
I am using the following configuration (simplified for the purpose of this
ticket):
{code}
<Configuration status="info" name="App1" monitorInterval="60">
<Properties>
<Property name="defaultLayout">[%t %d{EEE MMM dd HH:mm:ss z yyyy}
<%level{TRACE=6, DEBUG=5, INFO=4, WARN=3, ERROR=2, FATAL=1}>]
%m%n</Property>
<Property name="patternCharset">UTF-8</Property>
<Property name="logDir">/var/log/app1/</Property>
<Property name="backupDir">/var/backups/app1/%d{yyyy}/%d{MM}/</Property>
</Properties>
<Appenders>
<RollingRandomAccessFile name="A" fileName="${logDir}A.log"
filePattern="${backupDir}A.log-%d{yyyyMMdd}">
<PatternLayout pattern="${defaultLayout}" charset="${patternCharset}"/>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
</Policies>
</RollingRandomAccessFile>
<RollingRandomAccessFile name="B" fileName="${logDir}B.log"
filePattern="${backupDir}B.log-%d{yyyyMMdd}">
<PatternLayout pattern="${defaultLayout}" charset="${patternCharset}"/>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
</Policies>
</RollingRandomAccessFile>
<!-- ... additional appenders, only differing in
appender-name/log-file-name, where removed for this ticket -->
<RollingRandomAccessFile name="C" fileName="${logDir}Y.log"
filePattern="${backupDir}Y.log-%d{yyyyMMdd}">
<PatternLayout pattern="${defaultLayout}" charset="${patternCharset}"/>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
</Policies>
</RollingRandomAccessFile>
<RollingRandomAccessFile name="D" fileName="${logDir}Z.log"
filePattern="${backupDir}Z.log-%d{yyyyMMdd}">
<PatternLayout pattern="${defaultLayout}" charset="${patternCharset}"/>
<Policies>
<TimeBasedTriggeringPolicy interval="1" modulate="true"/>
</Policies>
</RollingRandomAccessFile>
</Appenders>
<Loggers>
<Logger name="A" level="INFO" additivity="false">
<AppenderRef ref="A"/>
</Logger>
<Logger name="B" level="INFO" additivity="false">
<AppenderRef ref="B"/>
</Logger>
<!-- ... additional loggers, only differing in logger-name/appender-ref,
where removed for this ticket -->
<Logger name="C" level="INFO" additivity="false">
<AppenderRef ref="C"/>
</Logger>
<Logger name="D" level="INFO" additivity="false">
<AppenderRef ref="D"/>
</Logger>
</Loggers>
</Configuration>
{code}
As part of last nights log-rotation, sub-folders "/2014/06/" had to be created
on top of the already existing "/var/backups/app1/" folder structure.
During this log-rotation task, 2 out of ~20 files (all constantly written by
the same application) where not rotated in the desired folder
"/var/backups/app1/2014/06/" but are still actively used in the base folder.
The only hint I could find regarding this issue was the following log output
from log4j (matching the rotation time):
2014-06-24 00:00:00,084 ERROR Unable to create directory
/var/backups/app1/2014/06
2014-06-24 00:00:00,084 ERROR Unable to create directory
/var/backups/app1/2014/06
Strangely all other log-file where correctly rotated to the identical
destination directory.
Until now i was not able to reproduce this behavior in my testing environment
but i suspect that there might be an issue with handling multiple log-rotations
in parallel for a "to be created" sub-directory.
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