RFR: 8371366: java/net/httpclient/whitebox/RawChannelTestDriver.java fails intermittently in jtreg timeout [v3]

[Daniel Fuchs]

On Tue, 11 Nov 2025 14:28:18 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Nothing looks wrong with the test or the code. The failure happens rarely - probably when the machine is under load: this test tries to saturate the socket buffers and is resource consuming.
>> 
>> The proposed fix is just to double the jtreg timeout for this test from 120 to 240.
>
> Daniel Fuchs has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix copyright dates

@djelinski nailed the issue: the method `byteArrayOfSize(1024);` may return new byte[0], and if that happens the server will write nothing and the ReadEvent will never be fired. The server will then be blocked waiting on readStalled.await().

This is what happens in the failing test:

Thread[#30,Thread-3,5,MainThreadGroup]: Server wrote total 491: awaiting initialReadStall
Thread[#30,Thread-3,5,MainThreadGroup]: Server wrote total 491: awaiting readStall

the second write was of 0 bytes - since the total number of bytes did not change

I have adapted the fix accordingly.

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PR Comment: https://git.openjdk.org/jdk/pull/28178#issuecomment-3527741220