SpringBoot Application failed at start up showing java.lang.IllegalStateException: Logback configuration error detected

this is my logback-spring.xml file

<included>
<configuration>
    <springProfile name="dev,uat">
        <appender name="SIFT"
            class="ch.qos.logback.classic.sift.SiftingAppender">
            <discriminator>
                <key>fileName</key>
                <defaultValue>/var/lib/unknown.log
                </defaultValue>
            </discriminator>
            <sift>
                <appender name="FILE-${fileName}"
                    class="ch.qos.logback.core.FileAppender">
                    <file>${fileName}</file>
                    <layout class="ch.qos.logback.classic.PatternLayout">
                        <pattern>%d{dd-MM-yyyy HH:mm:ss.SSS} | %level | %msg%n%rEx
                        </pattern>
                    </layout>
                </appender>
            </sift>
        </appender>
    </springProfile>

    <turboFilter
        class="ch.qos.logback.classic.turbo.DynamicThresholdFilter">
        <Key>logLevel</Key>
        <DefaultThreshold>TRACE</DefaultThreshold>
        <MDCValueLevelPair>
            <value>off</value>
            <level>ERROR</level>
        </MDCValueLevelPair>
        <MDCValueLevelPair>
            <value>DEBUG</value>
            <level>DEBUG</level>
        </MDCValueLevelPair>
        <MDCValueLevelPair>
            <value>TRACE</value>
            <level>TRACE</level>
        </MDCValueLevelPair>
        <MDCValueLevelPair>
            <value>INFO</value>
            <level>INFO</level>
        </MDCValueLevelPair>
        <MDCValueLevelPair>
            <value>ERROR</value>
            <level>ERROR</level>
        </MDCValueLevelPair>
        <MDCValueLevelPair>
            <value>WARN</value>
            <level>WARN</level>
        </MDCValueLevelPair>
    </turboFilter>

    <springProfile name="dev,uat">
        <root level="TRACE">
            <appender-ref ref="SIFT" />
        </root>
    </springProfile>



    <springProfile name="dev">
        <appender name="stdout"
            class="ch.qos.logback.core.ConsoleAppender">
            <encoder>
                <pattern>%d{dd-MM-yyyy HH:mm:ss.SSS} %5p %t %c{2}:%L - %m%n
                </pattern>
            </encoder>
        </appender>
    </springProfile>
    <springProfile name="dev">
        <root level="TRACE">
            <appender-ref ref="stdout" />
        </root>
    </springProfile>

</configuration>
 </included>

but i am getting this error

java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.joran.action.AppenderAction - Missing attribute [class] in element [sift] near line 11
ERROR in ch.qos.logback.core.joran.action.AppenderAction - Missing attribute [name] in element [sift] near line 11
ERROR in org.springframework.boot.logging.logback.SpringBootJoranConfigurator@515e8a - Could not find valid configuration instructions. Exiting.

Comment From: mhalbritter

I can't reproduce this. If i paste the logback-spring.xml in my project, I get:

Caused by: java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in org.springframework.boot.logging.logback.SpringBootJoranConfigurator@3e6f3f28 - Could not find valid configuration instructions. Exiting.
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.reportConfigurationErrorsIfNecessary(LogbackLoggingSystem.java:260)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:247)
    at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithConventions(AbstractLoggingSystem.java:80)
    at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:60)
    at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:187)
    at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:332)
    ... 19 more

When i remove the <included> tag, it works like expected.

If you'd like us to spend some time investigating, please take the time to provide a complete minimal sample (something that we can unzip or git clone, build, and deploy) that reproduces the problem.

Comment From: spring-projects-issues

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Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.

Comment From: medAmineRg

i guess i figure out the problem. you have to change the pattern from:

<pattern>%d{dd-MM-yyyy HH:mm:ss.SSS} %5p %t %c{2}:%L - %m%n</pattern>

to:

<pattern>%d{dd-MM-yyyy HH:mm:ss.SSS} %5p %t %logger{2}:%L - %m%n</pattern>