logback setup doesn't work correctly about java-logging-logback

[suraj-qlogic]

@gad2103,Thanks for filling this issue.i am deployed a ktor app on gae standard java11 with logback client and able to successfully log into logging console.For your first question like none of the logs show up. just the message about replayed logs...

Could you try below step and Please let us know if it fixes your issue for above question?

logback.xml

<configuration>
    <appender name="CLOUD" class="com.google.cloud.logging.logback.LoggingAppender">
        <!-- Optional : filter logs at or above a level -->
        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>INFO</level>
        </filter>
        <log>application.log</log> <!-- Optional : default java.log -->
        <resourceType>global</resourceType>
        <flushLevel>WARN</flushLevel> <!-- Optional : default ERROR -->
    </appender>
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{YYYY-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>
    <root level="trace">
        <appender-ref ref="STDOUT"/>
        <!-- Add Cloud Appender to root output-->
        <appender-ref ref="CLOUD" />
    </root>
    <logger name="org.eclipse.jetty" level="INFO"/>
    <logger name="io.netty" level="INFO"/>
</configuration>

Applicaton.kt

package com.test.logback

import io.ktor.application.Application
import io.ktor.application.call
import io.ktor.http.ContentType
import io.ktor.response.respondText
import io.ktor.routing.get
import io.ktor.routing.routing
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
fun main(args: Array<String>): Unit = io.ktor.server.jetty.EngineMain.main(args)

@Suppress("unused") // Referenced in application.conf
@kotlin.jvm.JvmOverloads
fun Application.module(testing: Boolean = false) {
    val logger: Logger = LoggerFactory.getLogger(this::class.java)
    routing {
        get("/") {
            logger.info("This is a test");
            call.respondText("hello world", contentType = ContentType.Text.Plain)
        }
    }
}

Output::

[minherz]

I close the issue due to inactivity. Feel free to reopen if you still experience the problem.