jstack and the target output

[Piotr Bzdyl]

Is there any other information I could collect to help troubleshoot this
problem? How could I check if VM runs with attach disabled?

I noticed the same behavior when trying to connect to the process using
JConsole: JConsole displays the sample app in the list and when I try to
connect it finally displays an error that it cannot connect whereas the
sample app prints thread dump on its console.


On Thu, Nov 21, 2013 at 7:18 PM, Alan Bateman <Alan.Bateman at oracle.com>wrote:

> On 21/11/2013 14:47, David Holmes wrote:
>
>>
>> I can recreate this using the minimal VM, which doesn't support
>> libattach. So it definitely seems like something is going wrong in the
>> attach process, but I can't say what. Not sure what debugging hooks we have
>> for the attach mechanism ??
>>
> The first attach involves signaling the target VM to start up the attach
> mechanism. So for the minimal VM or a VM running with attach disabled (or
> as Staffan pointed out, running with a different tmp directory) then the
> target VM gets a SIGQUIT and just prints the thread dump. It's hard to say
> what Piotr is running into but I think this at least explains it for the
> minimal VM.
>
> -Alan
>
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