SpringBoot with LogBack creating LOG_PATH_IS_UNDEFINED folder

Question

I am using SpringBoot with LogBack and using the below configuration in my yml file:

logging:     path: C:/var/log/pincode 

The logging.path Spring Environment Variable is transferred to the LOG_PATH Environment variable and the log file is placed at the correct place, but there is also a directory called LOG_PATH_IS_UNDEFINED created in the root directory of my project.

This seems to be caused by the different phase used by SpringBoot to configure LogBack with its Environment variables.

17:29:21,325 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 17:29:21,337 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern LOG_PATH_IS_UNDEFINED/catalina.out.%d{yyyy-MM-dd} for the active file 17:29:21,340 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'LOG_PATH_IS_UNDEFINED/catalina.out.%d{yyyy-MM-dd}'. 17:29:21,340 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight. 17:29:21,343 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Mon Aug 11 17:24:07 BRT 2014 17:29:21,346 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[serverConsole] - Active log file name: LOG_PATH_IS_UNDEFINED/catalina.out 17:29:21,346 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[serverConsole] - File property is set to [LOG_PATH_IS_UNDEFINED/catalina.out] ... 17:29:21,358 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 

And then after that it start configuring logback again but this time using the path i set:

17:29:21,672 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 17:29:21,673 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - No compression will be used 17:29:21,673 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy - Will use the pattern C:/var/log/pincode//catalina.out.%d{yyyy-MM-dd} for the active file 17:29:21,674 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'C:/var/log/pincode//catalina.out.%d{yyyy-MM-dd}'. 17:29:21,674 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight. 17:29:21,674 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Mon Aug 11 17:29:21 BRT 2014 17:29:21,674 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[serverConsole] - Active log file name: C:/var/log/pincode//catalina.out 17:29:21,674 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[serverConsole] - File property is set to [C:/var/log/pincode//catalina.out] ... 17:29:21,685 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 

My logback.xml

<?xml version="1.0" encoding="UTF-8"?> <configuration debug="true"> <include resource="org/springframework/boot/logging/logback/basic.xml" /> <property name="FILE_LOG_PATTERN"     value="%d{yyyy-MM-dd HH:mm:ss.SSS} %5p ${PID:- } [%t] --- %-40.40logger{39} : %m%n%wex" />  <appender name="serverConsole"           class="ch.qos.logback.core.rolling.RollingFileAppender">     <Append>true</Append>     <File>${LOG_PATH}/catalina.out</File>     <encoder>         <pattern>${FILE_LOG_PATTERN}</pattern>     </encoder>     <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">         <fileNamePattern>${LOG_PATH}/catalina.out.%d{yyyy-MM-dd}         </fileNamePattern>         <maxHistory>15</maxHistory>     </rollingPolicy> </appender>  <!-- Plain Text Rolling Appender --> <appender name="server"     class="ch.qos.logback.core.rolling.RollingFileAppender">     <Append>true</Append>     <File>${LOG_PATH}/pincode.log</File>     <filter class="ch.qos.logback.classic.filter.LevelFilter">         <level>INFO</level>         <onMatch>ACCEPT</onMatch>         <onMismatch>DENY</onMismatch>     </filter>     <encoder>         <pattern>${FILE_LOG_PATTERN}</pattern>     </encoder>     <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">         <fileNamePattern>${LOG_PATH}/pincode.log.%d{yyyy-MM-dd}         </fileNamePattern>         <maxHistory>15</maxHistory>     </rollingPolicy> </appender>  <!-- Plain Text Rolling Appender --> <appender name="server-error"     class="ch.qos.logback.core.rolling.RollingFileAppender">     <Append>true</Append>     <File>${LOG_PATH}/pincode-error.log</File>     <filter class="ch.qos.logback.classic.filter.LevelFilter">         <level>ERROR</level>         <onMatch>ACCEPT</onMatch>         <onMismatch>DENY</onMismatch>     </filter>     <encoder>         <pattern>${FILE_LOG_PATTERN}</pattern>     </encoder>     <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">         <fileNamePattern>${LOG_PATH}/pincode-error.log.%d{yyyy-MM-dd}         </fileNamePattern>         <maxHistory>15</maxHistory>     </rollingPolicy> </appender>  <logger name="com.app" level="INFO">     <appender-ref ref="server" />     <appender-ref ref="server-error" /> </logger>  <root level="INFO">     <appender-ref ref="serverConsole" /> </root>  

If I remove my logback.xml file from the project it doesn't create the folder, so somewhere Spring is loading the xml before parsing the yml?

How can I avoid Logback to create this LOG_PATH_IS_UNDEFINED directory?

Answer 1

In your case LOG_PATH is not defined on startup. You should use ${LOG_PATH:-.} instead , See .

But if you define logging.path in your application.properties you will see two log files in . and in ${logging.path} directory.

Spring container set LOG_PATH after Logback initialization... Logback is not supported lazy file creation as far as I know. In this case you should use logback-spring.xml instead logback.xml.