Issue 1:
I have searched the issues of this repository and believe that this is not a duplicate.

I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

Dubbo version: apache-dubbo-2.7.4.1

Operating System version: mac os

Java version: jdk1.8.0_211

Steps to reproduce this issue

when running demo dubbo-demo-xml-provider a null pointer appears

[27/12/19 00:41:45:876 CST] main INFO config.AbstractConfig: [DUBBO] The service ready on spring started. service: org.apache.dubbo.demo.DemoService, dubbo version: , current host: 192.168.0.100
Exception in thread "main" java.lang.NullPointerException
at org.apache.dubbo.config.AbstractInterfaceConfig.lambda$null$7(AbstractInterfaceConfig.java:632)
at java.util.Optional.orElseGet(Optional.java:267)
at org.apache.dubbo.config.AbstractInterfaceConfig.lambda$useRegistryForConfigIfNecessary$8(AbstractInterfaceConfig.java:620)
at java.util.Optional.ifPresent(Optional.java:159)
at org.apache.dubbo.config.AbstractInterfaceConfig.useRegistryForConfigIfNecessary(AbstractInterfaceConfig.java:618)
at org.apache.dubbo.config.AbstractInterfaceConfig.checkRegistry(AbstractInterfaceConfig.java:208)
at org.apache.dubbo.config.ServiceConfig.checkAndUpdateSubConfigs(ServiceConfig.java:303)
at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:370)
at org.apache.dubbo.config.spring.ServiceBean.export(ServiceBean.java:336)
at org.apache.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:114)
at org.apache.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:60)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:393)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:347)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:883)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at org.apache.dubbo.demo.provider.Application.main(Application.java:30)
[27/12/19 00:41:45:950 CST] Thread-0 INFO support.ClassPathXmlApplicationContext: Closing org.springframework.context.support.ClassPathXmlApplicationContext@2d363fb3: startup date [Fri Dec 27 00:41:44 CST 2019]; root of context hierarchy
[27/12/19 00:41:45:955 CST] Thread-0 INFO support.AbstractRegistryFactory: [DUBBO] Close all registries [], dubbo version: , current host: 192.168.0.100

Issue 2:
I have searched the issues of this repository and believe that this is not a duplicate.

I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

Dubbo version: master branch

Operating System version: macos

Java version: java11

Steps to reproduce this issue

./mvnw package -DskipTests -Pjava8-vm-args -Prelease

Expected Result

build success

Actual Result

build failed

If there is an exception, please attach the exception trace:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:3.0.1:jar (attach-javadoc) on project dubbo: MavenReportException: Error while generating Javadoc:
[ERROR] Exit code: 1 - /Users/xxx/Documents/incubator-dubbo/dubbo-common/src/main/java/org/apache/dubbo/common/logger/log4j2/Log4j2LoggerAdapter.java:23: error: package org.apache.logging.log4j does not exist
[ERROR] import org.apache.logging.log4j.LogManager;
[ERROR] ^
[ERROR] /Users/xxx/Documents/incubator-dubbo/dubbo-common/src/main/java/org/apache/dubbo/common/logger/log4j2/Log4j2LoggerAdapter.java:35: error: package org.apache.logging.log4j does not exist
[ERROR] private static org.apache.logging.log4j.Level toLog4j2Level(Level level) {
[ERROR] ^
[ERROR] /Users/xxx/Documents/incubator-dubbo/dubbo-common/src/main/java/org/apache/dubbo/common/logger/log4j2/Log4j2LoggerAdapter.java:57: error: package org.apache.logging.log4j does not exist
[ERROR] private static Level fromLog4j2Level(org.apache.logging.log4j.Level level) {
[ERROR] ^
[ERROR] /Users/xxx/Documents/incubator-dubbo/dubbo-common/src/main/java/org/apache/dubbo/common/logger/log4j2/Log4j2Logger.java:23: error: package org.apache.logging.log4j does not exist
[ERROR] private final org.apache.logging.log4j.Logger logger;
[ERROR] ^
[ERROR] /Users/xxx/Documents/incubator-dubbo/dubbo-common/src/main/java/org/apache/dubbo/common/logger/log4j2/Log4j2Logger.java:25: error: package org.apache.logging.log4j does not exist
[ERROR] public Log4j2Logger(org.apache.logging.log4j.Logger logger) {
[ERROR] ^
[ERROR]
[ERROR] Command line was: /Library/Java/JavaVirtualMachines/jdk-11.0.1.jdk/Contents/Home/bin/javadoc @options @packages
[ERROR]
[ERROR] Refer to the generated Javadoc files in '/Users/xxx/Documents/incubator-dubbo/dubbo-all/target/apidocs' dir.
[ERROR]
[ERROR] -> [Help 1]

Solution

log4j-core was defined in dubbo-common/pom.xml as provied

change to default scope compile