hui730 opened a new pull request, #43621:
URL: https://github.com/apache/spark/pull/43621
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### What changes were proposed in this pull request?
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My modification is a performance optimization, which keep the taskBinary in
Stage to avoid deserializing it multiple times, and send binary to executor
instead of task. Here are specific modifications：
a. Add stageID info to TaskDescription.
b. Add taskBinary info to taskSet. Remove taskBinary info to ShuffleMapTask
and ResultTask.
c. add binary getter/setter of Task.
d. Store binary broadcast when submitTasks.
e. Add new Netty event message LaunchBinary, before executor run task,
launch binary to new executor first.
### Why are the changes needed?
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the taskBinary for each task of the same stage is the same. The current
situation is that each task will bring a copy of the taskBinary's broadcast
variables to the executor, and my modification will send this taskBinary to
each executor that has executed the corresponding stage, reducing the
repetition of broadcast variables and avoid deserializing binary multiple times.
### Does this PR introduce _any_ user-facing change?
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No
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Because this modification is a modification of the Spark Core, and it also
involves some parameter changes for unit testing, so I conducted all unit
testing on all modules base on master branch.
### Was this patch authored or co-authored using generative AI tooling?
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No
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