[SPARK-45245][PYTHON][CONNECT] PythonWorkerFactory: Timeout if worker does not connect back. #43023
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cc: @HyukjinKwon, @WweiL |
| redirectStreamsToStderr(workerProcess.getInputStream, workerProcess.getErrorStream) | ||
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| // Wait for it to connect to our socket, and validate the auth secret. | ||
| serverSocketChannel.socket().setSoTimeout(10000) |
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There was supposed to be 10 second timeout. But this call does not seem to affect serverSocketChannel.accept().
This set might only take effect if we did serverSocketChannel.socket().accept(), but hat returns a socket, not a channel.
| // return (accept() used to be blocking), the test doesn't hang for a long time. | ||
| val createFuture = Future { | ||
| val ex = intercept[SparkException] { | ||
| workerFactory.createSimpleWorker(blockingMode = true) |
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May I know if this blockingMode=true would affect serverSocketChannel.configureBlocking(false) above?
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It doesn't. It is for client socket. Shall I remove it?
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Seems the tests are failing because of format, maybe try |
HyukjinKwon
changed the title
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@HyukjinKwon the test failures seem unrelated. I tried multiple times. different types of tests are failing. Do you think we can merge this? |
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Yeah I am merging it to master but I think we should switch this to use the daemonized worker instead of simple workers soon. Merged to master. |
I see. I have been looking for reasons doing so. This seems to be one of them. |
| import org.apache.spark.util.ThreadUtils | ||
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| // Tests for PythonWorkerFactory. | ||
| class PythonWorkerFactorySuite extends SparkFunSuite with Matchers with SharedSparkContext { |
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Does this suite have to extend Matchers? @HyukjinKwon can you double check?
…it in the test ### What changes were proposed in this pull request? This PR is a followup of #43023 that addresses a post-review comment. ### Why are the changes needed? It is unnecessary. It also matters with Scala compatibility so should better remove if unused. ### Does this PR introduce _any_ user-facing change? No, test-only. ### How was this patch tested? Manually. ### Was this patch authored or co-authored using generative AI tooling? No. Closes #45459 from HyukjinKwon/SPARK-45245-folllowup. Lead-authored-by: Hyukjin Kwon <[email protected]> Co-authored-by: Hyukjin Kwon <[email protected]> Signed-off-by: Dongjoon Hyun <[email protected]>
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What changes were proposed in this pull request?
createSimpleWorker()method inPythonWorkerFactorywaits forever if the worker fails to connect back to the server.This is because it calls accept() without a timeout. If the worker does not connect back, accept() waits forever. There is supposed to be 10 seconds timeout, but it was not implemented correctly.
This PR adds a 10 second timeout.
Why are the changes needed?
Otherwise create method could be stuck forever.
Does this PR introduce any user-facing change?
No
How was this patch tested?
Was this patch authored or co-authored using generative AI tooling?
Generated-by: ChatGPT 4.0
Asked ChatGPT to generate sample code to do non-blocking accept() on a socket channel in Java.