[SPARK-50383][CORE] Support Virtual Threads in REST Submission API
#48923
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dongjoon-hyun
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Virtual Threads in REST Submission API
viirya
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Nov 21, 2024
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Thank you, @viirya ! |
viirya
reviewed
Nov 21, 2024
| val newVirtualThreadPerTaskExecutor = | ||
| classOf[Executors].getMethod("newVirtualThreadPerTaskExecutor") | ||
| val service = newVirtualThreadPerTaskExecutor.invoke(null).asInstanceOf[ExecutorService] | ||
| threadPool.setVirtualThreadsExecutor(service) |
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The thread number configured for the threadPool also determines the number of virtual threads?
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Yes, AFAIK, this is orthogonally handled in Jetty layer, @viirya .
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BTW, after merging #48921, I need to rebase this PR to resolve the conflicts. |
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Rebased to master to resolve conflicts~ |
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Merged to master for Apache Spark 4.0.0. |
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What changes were proposed in this pull request?
This PR aims to support JEP-444: Virtual Threads in REST Submission API for Apache Spark 4.0.0.
Why are the changes needed?
Virtual Threadsbecomes an official feature in Java 21.In addition,
Jetty 11supportsVirtual Threads.We had better provide a way to use it via a new option
spark.master.rest.virtualThread.enabled, which is enabled in Java 21 runtime. Please note that this aims for high-throughput concurrency.Does this PR introduce any user-facing change?
No.
How was this patch tested?
Pass the CIs.
Was this patch authored or co-authored using generative AI tooling?
No.