摘要

总结自己springboot项目使用hbase、hadoop中出现的莫名奇怪的依赖使用报错

java">hbase   2.0.2版本
hadoop  3.1.1版本

注意：本地依赖版本最好和服务器上版本一致，避免发生莫名奇怪错误

情况1：NoClassDefFoundError

java">java.lang.NoClassDefFoundError: org/apache/hadoop/tracing/SpanReceiverHost
	at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:643) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:628) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3354) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:124) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3403) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3371) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:477) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem$1.run(FileSystem.java:216) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem$1.run(FileSystem.java:213) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_231]
	at javax.security.auth.Subject.doAs(Subject.java:422) ~[na:1.8.0_231]
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1729) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:213) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at com.geespace.microservices.directory.assets.service.impl.DataAssetsScreenServiceImpl.updateAssetsSize(DataAssetsScreenServiceImpl.java:149) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at com.geespace.microservices.directory.assets.service.impl.DataAssetsScreenServiceImpl$$FastClassBySpringCGLIB$$cc83a803.invoke(<generated>) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at org.springframework.aop.interceptor.AsyncExecutionInterceptor.lambda$invoke$0(AsyncExecutionInterceptor.java:115) ~[api-gateway-1.0-SNAPSHOT.jar:1.0-SNAPSHOT]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_231]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_231]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_231]
	at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_231]
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.tracing.SpanReceiverHost
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_231]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_231]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_231]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_231]
	... 27 common frames omitted	

原因：碰到这种xxxxxClass未找到，就说明服务器上使用jar包版本不对，导致找不到类，原因就是jar出现多版本导致的，这个类出现在hadoop-common 2.7.7中，而我要使用的是3.1.1版本，不应该出现这个对象

解决思路：pom依赖使用标签进行依赖冲突排除，确保最后只有一个版本即可（也就是把乱七八糟jar内部引入的版本全部排除调）

情况2：使用hbase报错：NullPointerException

下面这句使用报错 ↓

java"> FileSystem fs = FileSystem.get(new URI(hdfsPath), configuration, hdfsName);

原因：报空指针就是没有进行初始化，而直接调用方法导致的
解决思路：写到一起或者初始化后再使用即可

情况3：summary.typeQuotaInfos.typeQuotaInfo[3].type

查看这篇文章即可 -> ： https://blog.csdn.net/a924382407/article/details/117441247?spm=1001.2014.3001.5501