Thanks for the update Daniil. I still remain concerned about the
robustness of the command-line parsing - this seems like a feature that
needs its own set of tests.
I'll leave it up to Serguei and others as to how to proceed.
David
-----
On 19/01/2019 9:08 am, Daniil Titov wrote:
Hi David and Serguei,
Please review a new version of the fix that now covers the case when Java
executes a module with the main class name explicitly specified in the command
line.
Webrev: http://cr.openjdk.java.net/~dtitov/8205654/webrev.03
Bug: : https://bugs.openjdk.java.net/browse/JDK-8205654
Thanks!
--Daniil
On 1/8/19, 6:05 PM, "David Holmes" <[email protected]> wrote:
Hi Daniil,
Sorry this slipped through the Xmas break cracks :)
On 22/12/2018 12:04 pm, Daniil Titov wrote:
> Hi David and Serguei,
>
> Please review a new version of the fix that for Linux platform uses the
proc filesystem to retrieve the main class name for the running Java process.
>
> Webrev: http://cr.openjdk.java.net/~dtitov/8205654/webrev.02/
> Bug: https://bugs.openjdk.java.net/browse/JDK-8205654
It's more complex than I had envisaged but seems to be doing the job.
I'm not sure how robust the command-line parsing is, in particular it
doesn't handle these forms:
or java [options] -m <module>[/<mainclass>] [args...]
java [options] --module <module>[/<mainclass>] [args...]
(to execute the main class in a module)
I can't really comment on all the details.
Thanks,
David
-----
> Thanks,
> Daniil
>
> On 11/29/18, 4:52 PM, "David Holmes" <[email protected]> wrote:
>
> Hi Daniil,
>
> On 30/11/2018 7:30 am, Daniil Titov wrote:
> > Thank you, David!
> >
> > The proposed fix didn't help. It still hangs at some occasions.
Additional tracing showed that when jcmd is invoked with the main class name it
iterates over all running Java processes and temporary attaches to them to retrieve
the main class name. It hangs while trying to attach to one of the running Java
processes. There are numerous Java processes running at the host machine some
associated with the test framework itself and another with the tests running in
parallel. It is not clear what exact is this particular process since the jcmd hangs
before retrieving the process' main class name, but after all tests terminated the
process with this id is no longer running. I have to revoke this review since more
investigation is required.
>
> That sounds like an unsolvable problem for the test. You can't
control
> other Java processes on the machine, and searching by name requires
> asking each of them in turn.
>
> How do we get the list of Java processes in the first place?
Perhaps we
> need to do some /proc/<pid>/cmdline peeking?
>
> Cheers,
> David
>
> >
> > Best regards,
> > Daniil
> >
> >
> >
> > On 11/11/18, 1:35 PM, "David Holmes" <[email protected]>
wrote:
> >
> > Hi Daniil,
> >
> > I took a quick look at this one ... two minor comments
> >
> > The static class names could just be "Process" as they will
acquire the
> > enclosing class name as part of their own name anyway. As it
is this
> > gets repeated eg:
> >
> > HelpTest$HelpTestProcess
> > InvalidCommandTest$InvalidCommandTestProcess
> >
> > TestJavaProcess.java:
> >
> > 39 public static void main(String argv[]) {
> >
> > Nit: Should be "String[] argv" in Java style
> >
> > Thanks,
> > David
> >
> > On 10/11/2018 3:18 PM, Daniil Titov wrote:
> > > Please review the change that fixes
serviceability/dcmd/framework/* tests from a time out. The fix for JDK-8166642 made
serviceability/dcmd/framework/* tests non-concurrent to ensure that they don't interact
with each other and there are no multiple tests running simultaneously since all they do
share the common main class name com.sun.javatest.regtest.agent.MainWrapper. However, it
looks like the tests from other directories still might run in parallel with these
tests and they also have com.sun.javatest.regtest.agent.MainWrapper as a main class.
> > >
