Pinot compilation errors with Java 11

[mcvsubbu]

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project pinot-core: Compilation failure: Compilation failure:
[ERROR] /Users/kishoreg/projects/incubator-pinot/pinot-core/src/main/java/com/linkedin/pinot/core/segment/memory/PinotByteBuffer.java:[27,17] DirectBuffer is internal proprietary API and may be removed in a future release
[ERROR] /Users/kishoreg/projects/incubator-pinot/pinot-core/src/main/java/com/linkedin/pinot/core/segment/memory/PinotByteBuffer.java:[26,15] error: cannot find symbol
[ERROR] symbol: class Cleaner
[ERROR] location: package sun.misc
[ERROR] /Users/kishoreg/projects/incubator-pinot/pinot-core/src/main/java/com/linkedin/pinot/core/segment/memory/PinotByteBuffer.java:[27,17] DirectBuffer is internal proprietary API and may be removed in a future release

[rustkas]

How to fix it?

[vivekjj]

How was this fixed? I get the exact same error.

[kishoreg]

@vivekjj Pinot is not tested with jdk 11. Please use JDK 9 for building and running Pinot.

[vivekjj]

Thanks!

[lsabi]

@kishoreg is there any plan/roadmap to support newer versions of java?

Also, the only mention that I could find on the docs about the supported java version(s) is in the getting started tutorial, see https://pinot.readthedocs.io/en/latest/getting_started.html.

Though it only says that is requires java 8 or later. As a new user I was compiling with java 11 and getting errors. Only by trying out with java 8 I managed to run pinot. It would be better to explicitly write the supported java versions in order for new users to go through the tutorial smoothly.

Thanks.

[xiangfu0]

I've fixed those compilation error with java 11 and also added QuickStart tests to build Pinot with both JDK 8 and 11 for Travis.

Example: https://travis-ci.org/apache/incubator-pinot/builds/650497203