On Thu, 20 Apr 2023 22:22:06 GMT, Chris Plummer <cjplum...@openjdk.org> wrote:

>> Leonid Mesnik has updated the pull request incrementally with one additional 
>> commit since the last revision:
>> 
>>   JStackStressTest.java updated.
>
> test/jdk/sun/tools/jhsdb/JStackStressTest.java line 86:
> 
>> 84:             } catch (InterruptedException e) {
>> 85:             }
>> 86:             OutputAnalyzer jshellOutput = new 
>> OutputAnalyzer(jShellProcess);
> 
> It's not clear to me how moving this is fixing anything.

It is the main issues with current approach. The outputanalyzer tries to read 
from streams which are available only when process finishes. This test interact 
with process so it just hangs waiting of process completion.

> test/jdk/sun/tools/jstatd/JstatdTest.java line 357:
> 
>> 355:         assertEquals(stdout.size(), 1, "Output should contain one 
>> line");
>> 356:         assertTrue(stdout.get(0).startsWith("jstatd started"), "List 
>> should start with 'jstatd started'");
>> 357:         assertNotEquals(output.getExitValue(), 0,
> 
> Before your fix, was the "jstatd started" line being missed because of this 
> bug.

Yep. the output was "empty" before fix.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/13560#discussion_r1173155279
PR Review Comment: https://git.openjdk.org/jdk/pull/13560#discussion_r1173155433

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