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Ran 25 Aug 2025 11:37PM UTC

Files 615

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Committed 25 Aug 2025 11:25PM UTC coverage: 88.557% (-0.008%) from 88.565%

Job # #19959.1

Build Type

push

github

Committed by

web-flow

Commit Message

servlet: fix threadingTest and update lincheck (#12306)

Seems like previously it was not testing all the flows but only: the
write/flush calls are added to the queue by `runOrBuffer` because
`readyAndDrained` is initially `false`.

So,
* `isReady()` is never called
* `isReadyReturnedFalse` never set to true
* `maybeOnWritePossible()` does nothing

All that makes me think that #9917 is caused by some bugs in older
versions of llincheck, can be closed now.

A more real simulation happens if calling `onWritePossible` first via
`initialOnWritePossible`, and then it has found a race condition in
`AsyncServletOutputStreamWriterConcurrencyTest.isReady()`, if
`maybeOnWritePossible()` is executed before `return isReady`.

Additionally updated lincheck, 
* it does not need jvmArgs now 
* is compatible with java 8 again
* changed asserts from Truth to junit, as lincheck was trying to use
`com.google.common.truth.Subject.equals(Object)`

It still does not detect #12268, but might be needs more time.

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