[DRILL-8257] Resolve Netty lib conflicts

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.20.1
• Fix Version/s: 1.20.2
• Component/s: library
• Assignee: James Turton
• Reporter: James Turton
• Created: 12/Jul/22 08:53
• Updated: 13/Jul/22 08:36
• Resolved: 13/Jul/22 08:36

Description

The following transitive dependencies conflict with Drill's own, newer Netty dependencies and need to be excluded.

• jars/3rdparty/netty-transport-native-epoll-4.1.45.Final.jar
• jars/3rdparty/netty-all-4.1.59.Final.jar
• jars/3rdparty/netty-codec-http-4.1.59.Final.jar

It is not understood what exact conditions are needed for the library conflict to adversely affect a Drillbit, but when they are present it becomes impossible to enable TLS on the user RPC port. One guess is that a class loader race condition decides whether the problem will manifest.