[DRILL-7841] Need to exclude or shade netty lib to avoid [WARNING]

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.18.0
• Fix Version/s: 1.19.0
• Component/s: Storage - JDBC, Tools, Build & Test
• Assignee: Unassigned
• Reporter: Vitalii Diravka
• Reviewer: Igor Guzenko
• Created: 12/Jan/21 20:07
• Updated: 02/Mar/21 12:42
• Resolved: 02/Mar/21 12:42

Description

[Very minor, but can be good for newcomers]

In process of mvn clean install -DskipTests the folowwing WARNING is happened:

• org.apache.drill.exec:drill-jdbc-all:jar:1.19.0-SNAPSHOT

• • shade

• • • netty-transport-native-epoll-4.0.48.Final-linux-x86_64.jar, netty-transport-native-epoll-4.1.45.Final.jar define 46 overlapping classes:

[WARNING] netty-transport-native-epoll-4.0.48.Final-linux-x86_64.jar, netty-transport-native-epoll-4.1.45.Final.jar define 46 overlapping classes: 
netty-transport-native-epoll-4.0.48.Final-linux-x86_64.jar, netty-transport-native-epoll-4.1.45.Final.jar define 46 overlapping classes: 
  - io.netty.channel.epoll.AbstractEpollStreamChannel$2
  - io.netty.channel.epoll.AbstractEpollServerChannel$EpollServerSocketUnsafe
  - io.netty.channel.epoll.EpollDatagramChannel
  - io.netty.channel.epoll.AbstractEpollStreamChannel$SpliceInChannelTask
  - io.netty.channel.epoll.NativeDatagramPacketArray
  - io.netty.channel.epoll.EpollSocketChannelConfig
  - io.netty.channel.epoll.EpollTcpInfo
  - io.netty.channel.epoll.EpollEventArray
  - io.netty.channel.epoll.EpollEventLoop
  - io.netty.channel.epoll.EpollSocketChannel
  - 36 more...
netty-transport-native-epoll-4.0.48.Final-linux-x86_64.jar, netty-transport-native-unix-common-4.1.45.Final.jar define 15 overlapping classes: 
  - io.netty.channel.unix.Errors$NativeConnectException
  - io.netty.channel.unix.ServerDomainSocketChannel
  - io.netty.channel.unix.DomainSocketAddress
  - io.netty.channel.unix.Socket
  - io.netty.channel.unix.NativeInetAddress
  - io.netty.channel.unix.DomainSocketChannelConfig
  - io.netty.channel.unix.Errors$NativeIoException
  - io.netty.channel.unix.DomainSocketReadMode
  - io.netty.channel.unix.ErrorsStaticallyReferencedJniMethods
  - io.netty.channel.unix.UnixChannel
  - 5 more...
maven-shade-plugin has detected that some class files are
present in two or more JARs. When this happens, only one
single version of the class is copied to the uber jar.
Usually this is not harmful and you can skip these warnings,
otherwise try to manually exclude artifacts based on
mvn dependency:tree -Ddetail=true and the above output.
See http://maven.apache.org/plugins/maven-shade-plugin/