Hi Shaofeng,
forgot to say, when install/package, I also met these two errors and solved
as below:

[ERROR]
/Users/xixin/git/kylin/query/src/main/java/org/apache/kylin/query/adhoc/JdbcPushDownConnectionManager.java:[24,30]
错误: 程序包org.apache.commons.dbcp不存在

solved by add dependency in query pom.xml
                <dependency>
                    <groupId>commons-dbcp</groupId>
                    <artifactId>commons-dbcp</artifactId>
                    <version>1.2.1</version>
                </dependency>
------------------------------------------------------------
[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-compiler-plugin:3.5.1:compile
(default-compile) on project atopcalcite: Compilation failure: Compilation
failure:
this is because missing "calcite-linq4j-1.13.0-kylin-r3"

solved the same like missing "calcite-core:1.13.0-kylin-r4" actually this
version configured in kylin pom.xml 
      
        <calcite.version>1.13.0-kylin-r3</calcite.version>
branch v2.2.0-release use "r3", master branch use "r4"
------------------------------------------------------------

so Mr.Shaofeng could this be optimized, and a freshman could access Kylin
quickly

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