[jira] [Created] (ARROW-3175) Arrow Java: Upgrade to official FlatBuffers release (Flatbuffers incompatibility)
Alex Black created ARROW-3175:
Summary: Arrow Java: Upgrade to official FlatBuffers release (Flatbuffers incompatibility)
Project: Apache Arrow
Issue Type: Bug
Affects Versions: 0.10.0
Reporter: Alex Black
Arrow Java currently uses an unofficial flatbuffers dependency - com.vlkan:flatbuffers:
The likely motivation here is that previously, no Java flatbuffers implementation was available on maven central.
> Unfortunately, FlatBuffers project does not publish any artifacts to the Maven Central Repository
However, this is no longer the case:
The flatbuffers version used in Arrow java is a nearly 3-year-old snapshot, not even a version of an official release: [https://github.com/vy/flatbuffers#usage]
The main problem is that this version of flatbuffers is not compatible with the official releases of flatbuffers.
For example, we use the official flatbuffers releases in ND4J and Deeplearning4j: [https://github.com/deeplearning4j/deeplearning4j]
Running Arrow with an official flatbuffers library on the classpath results in issues such as:
Simply excluding the com.vlkan:flatbuffers dependency in lieu of an official flatbuffers release is not a solution (same exception as above) and we aren't prepared to downgrade all of our projects to use the flatbuffers version that Arrow currently requires.
Consequently, this is a major issue that prevents us using Arrow in our libraries.
I have prepared a simple repository to reproduce this issue, if required: [https://github.com/AlexDBlack/arrowflatbufferstest]
Is there a reason for using this particular version of flatbuffers, and if not, can Arrow java use an official release of flatbuffers instead?
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