[PR] fix(arrow/ipc): avoid deadlock on compression errors [arrow-go]

["fallintoplace (via GitHub)" <gi...@apache.org>]

fallintoplace opened a new pull request, #1142:
URL: https://github.com/apache/arrow-go/pull/1142

   ### Rationale for this change
   
   Parallel body compression sent worker errors through an unbuffered channel before the parent waited for the workers. A compressor failure could therefore leave the writer blocked forever, and the producer could continue sending work after the workers had stopped.
   
   ### What changes are included in this PR?
   
   Buffer the first worker error, make producer sends cancellation-aware, and add a regression test that uses a failing compressor with parallel compression.
   
   ### Are these changes tested?
   
   - `go test ./arrow/ipc`
   - `go test -race ./arrow/ipc -run TestRecordEncoderCompressionErrorDoesNotDeadlock`
   
   ### Are there any user-facing changes?
   
   Parallel IPC compression now returns compressor failures instead of hanging.


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Re: [PR] fix(arrow/ipc): avoid deadlock on compression errors [arrow-go]

["zeroshade (via GitHub)" <gi...@apache.org>]

zeroshade merged PR #1142:
URL: https://github.com/apache/arrow-go/pull/1142


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