前言
最近比较寂寞，想学dubbo，又不想按照官网那种方式进行配置，想集成于spring boot；所以上网找了一下有没有spring boot dubbo这样的玩意；于是就发现了spring-boot-starter-dubbo 并且还有一个spring-boot-starter-dubbo-sample; 欣喜若狂地下载下来，竟然启动不起来；于是改巴改巴，将坑都给填填，以后再详细研究原理
环境搭建步骤
- 下载zookeeper，解压并启动；
- 下载sample代码，分别启动server和client
- 启动client成功后，client和server和console里面分别打印abccc即可成功
POM文件修改
- pom文件里面的spring boot starter-parent的1.3.6.RELEASE版本号在maven中央仓库里面没有，改成了1.3.5.RELEASE
- pom文件里面的spring-boot-starter-dubbo的1.0.0-SNAPSHOT在maven中央仓库里面也没有，改成了1.0.0
坑一： 运行了zookeeper启动命令，但是状态却是没有启动
➜ bin sh zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /Users/admin/projects/zookeeper-3.4.8/bin/../conf/zoo.cfg
-n Starting zookeeper ...
STARTED
➜ bin sh zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /Users/admin/projects/zookeeper-3.4.8/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.
解决方法：使用前置启动：sh zkServer.sh start-foreground
➜ bin sh zkServer.sh start-foreground
ZooKeeper JMX enabled by default
Using config: /Users/admin/projects/zookeeper-3.4.8/bin/../conf/zoo.cfg
2017-07-20 11:23:58,873 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /Users/admin/projects/zookeeper-3.4.8/bin/../conf/zoo.cfg
2017-07-20 11:23:58,877 [myid:] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3
2017-07-20 11:23:58,878 [myid:] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 0
2017-07-20 11:23:58,878 [myid:] - INFO [main:DatadirCleanupManager@101] - Purge task is not scheduled.
2017-07-20 11:23:58,878 [myid:] - WARN [main:QuorumPeerMain@113] - Either no config or no quorum defined in config, running in standalone mode
2017-07-20 11:23:58,890 [myid:] - INFO [main:QuorumPeerConfig@103] - Reading configuration from: /Users/admin/projects/zookeeper-3.4.8/bin/../conf/zoo.cfg
2017-07-20 11:23:58,890 [myid:] - INFO [main:ZooKeeperServerMain@95] - Starting server
2017-07-20 11:24:03,905 [myid:] - INFO [main:Environment@100] - Server environment:zookeeper.version=3.4.8--1, built on 02/06/2016 03:18 GMT
2017-07-20 11:24:03,905 [myid:] - INFO [main:Environment@100] - Server environment:host.name=localhost
2017-07-20 11:24:03,906 [myid:] - INFO [main:Environment@100] - Server environment:java.version=1.7.0_79
2017-07-20 11:24:03,906 [myid:] - INFO [main:Environment@100] - Server environment:java.vendor=Oracle Corporation
2017-07-20 11:24:03,906 [myid:] - INFO [main:Environment@100] - Server environment:java.home=/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre
2017-07-20 11:24:03,906 [myid:] - INFO [main:Environment@100] - Server environment:java.class.path=/Users/admin/projects/zookeeper-3.4.8/bin/../build/classes:/Users/admin/projects/zookeeper-3.4.8/bin/../build/lib/*.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../lib/slf4j-log4j12-1.6.1.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../lib/slf4j-api-1.6.1.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../lib/netty-3.7.0.Final.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../lib/log4j-1.2.16.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../lib/jline-0.9.94.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../zookeeper-3.4.8.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../src/java/lib/*.jar:/Users/admin/projects/zookeeper-3.4.8/bin/../conf:
2017-07-20 11:24:03,907 [myid:] - INFO [main:Environment@100] - Server environment:java.library.path=/Users/admin/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
2017-07-20 11:24:03,907 [myid:] - INFO [main:Environment@100] - Server environment:java.io.tmpdir=/var/folders/5k/92yp5fn10cg0dw2gzyrjynqh0000gn/T/
2017-07-20 11:24:03,907 [myid:] - INFO [main:Environment@100] - Server environment:java.compiler=<NA>
2017-07-20 11:24:03,909 [myid:] - INFO [main:Environment@100] - Server environment:os.name=Mac OS X
2017-07-20 11:24:03,909 [myid:] - INFO [main:Environment@100] - Server environment:os.arch=x86_64
2017-07-20 11:24:03,910 [myid:] - INFO [main:Environment@100] - Server environment:os.version=10.12
2017-07-20 11:24:03,910 [myid:] - INFO [main:Environment@100] - Server environment:user.name=admin
2017-07-20 11:24:03,910 [myid:] - INFO [main:Environment@100] - Server environment:user.home=/Users/admin
2017-07-20 11:24:03,910 [myid:] - INFO [main:Environment@100] - Server environment:user.dir=/Users/admin/projects/zookeeper-3.4.8/bin
2017-07-20 11:24:03,917 [myid:] - INFO [main:ZooKeeperServer@787] - tickTime set to 2000
2017-07-20 11:24:03,917 [myid:] - INFO [main:ZooKeeperServer@796] - minSessionTimeout set to -1
2017-07-20 11:24:03,917 [myid:] - INFO [main:ZooKeeperServer@805] - maxSessionTimeout set to -1
2017-07-20 11:24:03,936 [myid:] - INFO [main:NIOServerCnxnFactory@89] - binding to port 0.0.0.0/0.0.0.0:2181
坑二： ModuleConfig.module为null
Caused by: java.lang.IllegalStateException: ModuleConfig.module == null
at com.alibaba.dubbo.config.AbstractConfig.appendParameters(AbstractConfig.java:282) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.AbstractConfig.appendParameters(AbstractConfig.java:217) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:357) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:281) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:242) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:143) ~[dubbo-2.5.3.jar:2.5.3]
at com.alibaba.dubbo.config.spring.AnnotationBean.postProcessAfterInitialization(AnnotationBean.java:195) ~[dubbo-2.5.3.jar:2.5.3]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:422) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.4.RELEASE.jar:4.2.4.RELEASE]
... 14 common frames omitted
Caused by: java.lang.IllegalStateException: ModuleConfig.module == null
at com.alibaba.dubbo.config.AbstractConfig.appendParameters(AbstractConfig.java:267) ~[dubbo-2.5.3.jar:2.5.3]
... 23 common frames omitted
解决方法：在application.properties当中添加spring.dubbo.module.default=false
坑三：启动Client报错
failed to connect to server /10.3.52.85:20880, error message is:connection timed out