SpringBoot Unable to use native boot with Loki4jAppender

I found this issue, but in my case the loki endpoint has authentication.

Error:

ERROR in ch.qos.logback.core.model.processor.ImplicitModelHandler - Could not find an appropriate class for property [auth]

Stacktrace:

13:11:52.116 [main] INFO org.springframework.boot.devtools.restart.RestartApplicationListener -- Restart disabled due to context in which it is running
13:11:52,146 |-WARN in ch.qos.logback.core.model.processor.AppenderModelHandler - Appender named [LOKI_PRODUCTION] not referenced. Skipping further processing.
Logging system failed to initialize using configuration from 'null'
java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.model.processor.ImplicitModelHandler - Could not find an appropriate class for property [auth]
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.reportConfigurationErrorsIfNecessary(LogbackLoggingSystem.java:291)
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.initializeFromAotGeneratedArtifactsIfPossible(LogbackLoggingSystem.java:222)
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:196)
        at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:332)
        at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:298)
        at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:246)
        at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:223)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
        at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
        at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:81)
        at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:64)
        at java.base@21.0.2/java.lang.Iterable.forEach(Iterable.java:75)
        at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
        at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
        at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:63)
        at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:353)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350)
        at br.com.digital.core.CoreApplication.main(CoreApplication.java:14)
        at java.base@21.0.2/java.lang.invoke.LambdaForm$DMH/sa346b79c.invokeStaticInit(LambdaForm$DMH)
Application run failed
java.lang.IllegalStateException: java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.model.processor.ImplicitModelHandler - Could not find an appropriate class for property [auth]
        at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:347)
        at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:298)
        at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:246)
        at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:223)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
        at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
        at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:81)
        at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:64)
        at java.base@21.0.2/java.lang.Iterable.forEach(Iterable.java:75)
        at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
        at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
        at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:63)
        at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:353)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350)
        at br.com.digital.core.CoreApplication.main(CoreApplication.java:14)
        at java.base@21.0.2/java.lang.invoke.LambdaForm$DMH/sa346b79c.invokeStaticInit(LambdaForm$DMH)
Caused by: java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.model.processor.ImplicitModelHandler - Could not find an appropriate class for property [auth]
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.reportConfigurationErrorsIfNecessary(LogbackLoggingSystem.java:291)
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.initializeFromAotGeneratedArtifactsIfPossible(LogbackLoggingSystem.java:222)
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:196)
        at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:332)
        ... 20 more
Exception in thread "main" java.lang.IllegalStateException: java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.model.processor.ImplicitModelHandler - Could not find an appropriate class for property [auth]
        at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:347)
        at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:298)
        at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:246)
        at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:223)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
        at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
        at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
        at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:81)
        at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:64)
        at java.base@21.0.2/java.lang.Iterable.forEach(Iterable.java:75)
        at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
        at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
        at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:63)
        at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:353)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:313)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1361)
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1350)
        at br.com.digital.core.CoreApplication.main(CoreApplication.java:14)
        at java.base@21.0.2/java.lang.invoke.LambdaForm$DMH/sa346b79c.invokeStaticInit(LambdaForm$DMH)
Caused by: java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.core.model.processor.ImplicitModelHandler - Could not find an appropriate class for property [auth]
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.reportConfigurationErrorsIfNecessary(LogbackLoggingSystem.java:291)
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.initializeFromAotGeneratedArtifactsIfPossible(LogbackLoggingSystem.java:222)
        at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:196)
        at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:332)
        ... 20 more

logback-spring.xml:

<?xml version="1.0" encoding="UTF-8"?>

<!-- https://loki4j.github.io/loki-logback-appender/docs/configuration -->

<configuration>        
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <include resource="org/springframework/boot/logging/logback/console-appender.xml" />

    <springProperty scope="context" name="appName" source="spring.application.name"/>

    <appender name="LOKI_STAGING" class="com.github.loki4j.logback.Loki4jAppender">
        <http>
            <url>https://logs-prod-024.grafana.net/loki/api/v1/push</url>
            <auth>
                <username>${GRAFANA_USERNAME_STAGING}</username>
                <password>${GRAFANA_PASSWORD_STAGING}</password>
            </auth>
            <tenantId>${TENANT_ID}</tenantId>
            <requestTimeoutMs>30000</requestTimeoutMs>
        </http>
        <format>
            <label>
                <pattern>app=${appName},host=${HOSTNAME},tenant=${TENANT_ID},subtenant=${SUB_TENANT_ID},level=%level</pattern>
                <readMarkers>true</readMarkers>
            </label>
            <message>
                <pattern>
                    "%message"
                </pattern>
            </message>
         </format>
     </appender>

    <appender name="LOKI_PRODUCTION" class="com.github.loki4j.logback.Loki4jAppender">
        <http>
            <url>https://logs-prod-024.grafana.net/loki/api/v1/push</url>
            <auth>
                <username>${GRAFANA_USERNAME_PRODUCTION}</username>
                <password>${GRAFANA_PASSWORD_PRODUCTION}</password>
            </auth>
            <tenantId>${TENANT_ID}</tenantId>
            <requestTimeoutMs>30000</requestTimeoutMs>
        </http>
        <format>
            <label>
                <pattern>app=${appName},host=${HOSTNAME},tenant=${TENANT_ID},subtenant=${SUB_TENANT_ID},level=%level</pattern>
                <readMarkers>true</readMarkers>
            </label>
            <message>
                <pattern>
                    "%message"
                </pattern>
            </message>
         </format>
     </appender>

    <springProfile name="staging">
        <root level="INFO">
            <appender-ref ref="LOKI_STAGING" />
            <appender-ref ref="CONSOLE"/>
        </root>
    </springProfile>

    <springProfile name="production">
        <root level="INFO">
            <appender-ref ref="LOKI_PRODUCTION" />
            <appender-ref ref="CONSOLE"/>
        </root>
    </springProfile>

    <springProfile name="!production &amp; !staging">
        <root level="INFO">
            <appender-ref ref="CONSOLE"/>
        </root>
    </springProfile>
</configuration>

I tried to add @RegisterReflection(classes = {Loki4jAppender.class, JavaHttpSender.class, ApacheHttpSender.class}) in a @Configuration but it didn't work

Spring boot version is 3.4.2

Comment From: fkjaekel

loki-logback-appender version is 1.6.0

Comment From: nosan

reflect-config.json file contains incorrect data for AbstractHttpSender.BasicAuth nested class.

Generated value:

  {
    "name": "com.github.loki4j.logback.AbstractHttpSender.BasicAuth",
    "allPublicConstructors": true,
    "queryAllPublicMethods": true,
    "allPublicMethods": true
  }

the name property should be com.github.loki4j.logback.AbstractHttpSender$BasicAuth instead of com.github.loki4j.logback.AbstractHttpSender.BasicAuth

I've fixed it in https://github.com/spring-projects/spring-boot/compare/main...nosan:spring-boot:44016

This should probably be fixed in version 3.4.x.

Meanwhile, you can create your own META-INF/native-image/com/test1/reflect-config.json with the following content to fix this issue:

[
  {
    "name": "com.github.loki4j.logback.AbstractHttpSender$BasicAuth",
    "allPublicConstructors": true,
    "queryAllPublicMethods": true,
    "allPublicMethods": true
  }
]