On 26/02/2019 4:01 pm, Yasumasa Suenaga wrote:
Hi all,
When I attached to VM which is after 8215622 change via jcmd in JDK 8
on Linux, jcmd hanged.
What command are you trying to execute through jcmd?
Do we support connection to later VMs from earlier JDK tools?
I checked the status of target VM and jcmd,
LinuxAttachListener::read_request() on target VM was waiting for
subsequent argument.
8215622 increased number of arguments of Attach API [1].
Isn't that supposed to be a maximum number of arguments? So if less are
sent it should still work okay?
Of course it is my mistake, but I think we can increase version number
(PROTOCOL_VERSION) because Attach API has been updated in 8215622.
What do you think?
That will just cause it be rejected rather than hang - right?
Thanks,
David
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If it is accepted, I will file it to JBS.
Thanks,
Yasumasa
[1] http://hg.openjdk.java.net/jdk/jdk/rev/e7cf035682e3#l2.1
