Dear: Wechat group "Apache Linkis community Development group "chat records are as follows: 微信群"Apache Linkis 社区开发群"的聊天记录如下: ————— 2022-10-12 ————— reactor 14:05 Everyone, has anyone used linkis-1.2.0 jdbc engine? There is a problem at present, please consult reactor 14:05 The error stack information is as follows: 寻找大海的鱼.reactor 14:05 各位大佬，有人使用过linkis-1.2.0版本的jdbc引擎吗？ 目前遇到一个问题，请教一下 寻找大海的鱼.reactor 14:05 报错堆栈信息如下： 2022-10-11 16:18:06.631 [INFO ] [ConcurrentEngineConnThreadPool1 ] o.a.l.m.e.j.e.JDBCEngineConnExecutor (94) [$anonfun$executeLine$3] - The jdbc connection has created successfully! 2022-10-11 16:18:06.640 [INFO ] [ConcurrentEngineConnThreadPool1 ] o.a.l.m.e.j.e.JDBCEngineConnExecutor (106) [executeLine] - create statement is: com.mysql.cj.jdbc.StatementImpl@3a137d10 2022-10-11 16:18:06.661 [INFO ] [ConcurrentEngineConnThreadPool1 ] o.a.l.m.e.j.e.JDBCEngineConnExecutor (109) [executeLine] - Is ResultSet available ? : true 2022-10-11 16:18:06.661 [INFO ] [ConcurrentEngineConnThreadPool1 ] o.a.l.m.e.j.e.JDBCEngineConnExecutor (112) [executeLine] - ResultSet is available 2022-10-11 16:18:06.907 [ERROR] [ConcurrentEngineConnThreadPool1 ] o.a.l.m.e.j.e.JDBCEngineConnExecutor (131) [executeLine] - Cannot run show tables java.lang.NoClassDefFoundError: org/apache/hadoop/tracing/SpanReceiverHost at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:634) ~[hadoop-hdfs-2.7.2.jar:?] at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:619) ~[hadoop-hdfs-2.7.2.jar:?] at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149) ~[hadoop-hdfs-2.7.2.jar:?] at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3303) ~[hadoop-common-3.2.1.jar:?] at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:124) ~[hadoop-common-3.2.1.jar:?] at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3352) ~[hadoop-common-3.2.1.jar:?] at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3320) ~[hadoop-common-3.2.1.jar:?] at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:479) ~[hadoop-common-3.2.1.jar:?] at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:227) ~[hadoop-common-3.2.1.jar:?] at org.apache.linkis.hadoop.common.utils.HDFSUtils$$anon$2.run(HDFSUtils.scala:126) ~[linkis-hadoop-common-1.2.0.jar:1.2.0] at org.apache.linkis.hadoop.common.utils.HDFSUtils$$anon$2.run(HDFSUti reactor 14:06 If you look at the situation, it's [linkis - hadoop - common - 1.2.0. Jar: 1.2.0] Dependent on [hadoop - common - 3.2.1. Jar:?] Dependent on [hadoop - HDFS - 2.7.2. Jar:?] , using the kind of org. Apache. Hadoop. Tracing. SpanReceiverHost Class 1, org. Apache. Hadoop. Tracing. SpanReceiverHost belongs to the hadoop - common - XXX. Jars, and hadoop - common - 3.2.1. Jar version there is no such, This class is included in the lower version of hadoop-common-2.7.2.jar; 2, plan to upgrade the version of hadoop-hdfs, found that hadoop-HDFS-3.x.jar and hadoop-HDFS-2.8.5. jar and the version of hadoop-HDFS-2.7.2. jar, many classes are missing Mr Flash 14:10 This is not a reactor. Do you have a hadoop version of 2.7.2? This is not a reactor 14:11 We use hadoop at 3.2.1 Mr Flash 14:12 About hadoop 3, there seems to be a description on the official website, please check Fish in the sea.reactor 14:13 Thank you. Do you refer to linkis' official website? Mr. Flash 14:13 Wait a moment Mr Flash 14:17 https://linkis.apache.org/zh-CN/docs/latest/development/linkis-compile-and-package This is not a reactor 14:18 Thank you very much, boss. Let me take a look reactor 14:26 (Reactor 14:26 This place, when we compile, has been changed to hadoop-hdfs-client [facepface] reactor 14:50 (Reactor 14:50 Is there somewhere else in the project that indirectly references the hadoop-hdfs package Mr. Flash 14:50 2.7.1 It does seem that it shouldn't Mr Flash 14:52 Look hbase - server None of the dependencies under the slider-core are quite right reactor 14:56 (Reactor 14:56 Well, hadoop-hdfs-2.x and hadoop-hdfs-client-3.x have many classes with the same name 寻找大海的鱼.reactor 14:06 情况分析下来，就是 [linkis-hadoop-common-1.2.0.jar:1.2.0] 依赖于[hadoop-common-3.2.1.jar:?] 依赖于[hadoop-hdfs-2.7.2.jar:?]，使用到了类org.apache.hadoop.tracing.SpanReceiverHost 1，类org.apache.hadoop.tracing.SpanReceiverHost 属于hadoop-common-xxx.jar包，而hadoop-common-3.2.1.jar版本里面没有此类，低版本的hadoop-common-2.7.2.jar中包含此类； 2，打算升级hadoop-hdfs的版本，发现hadoop-hdfs-3.x.jar和hadoop-hdfs-2.8.5.jar等高版本，与hadoop-hdfs-2.7.2.jar这个版本差距甚大，很多类都没有了 闪电先生 14:10 @寻找大海的鱼.reactor 你本身hadoop是什么版本 是2.7.2吗？ 寻找大海的鱼.reactor 14:11 我们使用hadoop是3.2.1 闪电先生 14:12 关于hadoop 3,好像官网有一段描述，你找找看 寻找大海的鱼.reactor 14:13 谢谢，你指的官网，是指linkis的吗？ 闪电先生 14:13 稍等 闪电先生 14:17 https://linkis.apache.org/zh-CN/docs/latest/development/linkis-compile-and-package 寻找大海的鱼.reactor 14:18 非常感谢大佬，我先看看 寻找大海的鱼.reactor 14:26 这个地方，我们编译的时候，已经修改成hadoop-hdfs-client了[捂脸] 寻找大海的鱼.reactor 14:50 是不是项目里面还有其它地方间接地引用了hadoop-hdfs包 闪电先生 14:50 2.7.1确实好像不应该啊 闪电先生 14:52 看起来hbase-server slider-core下面的依赖都不太对 寻找大海的鱼.reactor 14:56 嗯，hadoop-hdfs-2.x和hadoop-hdfs-client-3.x好多重名的class -- Best Regards ------ 康悦 ritakang GitHub：Ritakang0451 E-mail：rita0...@163.com
