错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘ds1-sentinel-nacos-datasource’: FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:176) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1828) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1265) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:334) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at com.alibaba.cloud.sentinel.custom.SentinelDataSourceHandler.registerBean(SentinelDataSourceHandler.java:203) ~[spring-cloud-starter-alibaba-sentinel-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at com.alibaba.cloud.sentinel.custom.SentinelDataSourceHandler.lambda$afterSingletonsInstantiated$0(SentinelDataSourceHandler.java:93) ~[spring-cloud-starter-alibaba-sentinel-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at java.util.TreeMap.forEach(TreeMap.java:1005) ~[na:1.8.0_131]
at com.alibaba.cloud.sentinel.custom.SentinelDataSourceHandler.afterSingletonsInstantiated(SentinelDataSourceHandler.java:80) ~[spring-cloud-starter-alibaba-sentinel-2.2.2.RELEASE.jar:2.2.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:914) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.12.RELEASE.jar:5.2.12.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.7.RELEASE.jar:2.3.7.RELEASE]
at o
解决：
高版本spring-cloud-starter-alibaba-nacos 需要带上nacos的账户和密码
在yml文件中假设username和password

spring:
  application:
    name: nacos-provider-movie
  cloud:
    nacos:
      # nacos注册中心的地址
      server-addr: localhost:8848
    sentinel:
      transport:
        # 当前微服务和sentinel控制台进行数据传递的端口
        port: 8719
        # sentinel控制台路径配置
        dashboard: http://localhost:8080
      datasource:
        ds1:
          # 要加载sentinel默认配置的地方
          nacos:
#            config:
#              # 名称空间
#              namespace: 27dd4dc9-be50-44aa-9eb0-5b18d48039eb
            username: nacos
            password: nacos
            # nacos注册中心的地址
            server-addr: localhost:8848
            # nacos配置中心的配置文件名称
            dataId: cloudalibaba-sentinel-service
            groupId: DEFAULT_GROUP
            # 加载的配置文件中数据的格式
            data-type: json
            rule-type: flow
server:
  port: 7000
参考：https://www.yuque.com/yuqueyonghu4gseak/yc/gyft35
 https://blog.csdn.net/JAVAlife2021/article/details/122353576
                    错误：org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘ds1-sentinel-nacos-datasource’: FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerExceptionat org.springframework.beans.fact
				
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ds1-sentinel-nacos-datasource': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException
	at org.springframework.beans.factory
				
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ds2-sentinel-nacos-datasource': FactoryBean threw exception on object creation; nested exception is java.lang.NullPointerException
	at org.springframework.beans.factory
				
1.Failed to configure a DataSource
2.An attempt was made to call a method that does not exist
3.Error creating bean with name xxx...
4.Failed to start bean 'documentationPluginsBootstrapper'
5.Unresolved plugin: 'org.[apache]...
				
1、背景：
  今天在测试Dockfile的时候，新建了一个hello world项目，pom中的依赖，直接从原有的项目中copy过来的，也没有仔细看其中包含的依赖有哪些；结果在启动的时候出现如下问题：
2、问题描述：
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-12-11 09:22:32.109 ERROR 10
Post-processing of merged bean definition failed; nested exception is java.lang.NoSuchMethodError: 'java.lang.String javax.annotation.Resource.lookup()'
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(Abstr
				UserWarning: To copy construct from a tensor, it is recommended to use sourceTensor.clone().detach()
					11685
                Resource wordnet not found. ； [nltk_data] Error loading wordnet: ＜urlopen error [Errno 11004]
                    什么都不懂的小又又: 
                    手动下载wordnet语料库，下载地址是https://raw.githubusercontent.com/nltk/nltk_data/gh-pages/packages/corpora/wordnet.zip。下载地址访问不了呢
                Resource wordnet not found. ； [nltk_data] Error loading wordnet: ＜urlopen error [Errno 11004]
                    ___CarGo°: 
                    方法1以解决。下载好的zip解压，放到corpora目录里边就可以了。参考路径：D:\nltk_data\corpora\wordnet     里边一堆.exc文件
                对VMware已经创建的虚拟机进行磁盘扩容过程以及会遇到的问题
                    不让我抬杠，那我拿什么理智？: 
                    lvextend -L +29G /dev/sda4命令错了，要改为lvextend -L +30G /dev/mapper/centos-lvol0
其中lvol0是刚刚ivcreate命令创建的
                对VMware已经创建的虚拟机进行磁盘扩容过程以及会遇到的问题
                    不让我抬杠，那我拿什么理智？: 
                    错误2 里的10236 啥意思？？？而且命令执行了也没作用
                ModuleNotFoundError: No module named ‘transformers.modeling_gpt2‘
                    m0_72358627: 
                    请问这个时候transformers的版本是多少呢