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David LiGitHub
5256e434935
David Li authored and GitHub committed 0310add1776
ARROW-17604: [Docs][Java] Make it more obvious that --add-opens is required (#14066)

- Improve docs about this
- Improve error message about this

  ```
  java.lang.RuntimeException: Failed to initialize MemoryUtil. Was Java started with `--add-opens=java.base/java.nio=ALL-UNNAMED`? (See https://arrow.apache.org/docs/java/install.html)
	  at org.apache.arrow.memory.util.MemoryUtil.<clinit>(MemoryUtil.java:138)
	  at org.apache.arrow.memory.DefaultAllocationManagerFactory.<clinit>(DefaultAllocationManagerFactory.java:31)
  ```

Authored-by: David Li <li.davidm96@gmail.com>
Signed-off-by: David Li <li.davidm96@gmail.com>