Any news from JDK-8151981 in Java8 ?

[forax at univ-mlv.fr]

It's just that i've seen several times setCallSiteTargetNormal in the profile and each time it was my fault,
creating a GWT with the two branches swaped, invalidating SwitchPoints too vigorously, etc.

Rémi  

----- Mail original -----
> De: "Hannes Wallnöfer" <hannes.wallnoefer at oracle.com>
> À: "Remi Forax" <forax at univ-mlv.fr>
> Cc: "João Paulo Varandas" <joaovarandas at inpaas.com>, "nashorn-dev" <nashorn-dev at openjdk.java.net>
> Envoyé: Mardi 12 Décembre 2017 15:35:02
> Objet: Re: Any news from JDK-8151981 in Java8 ?

> Hi Rémi,
> 
> Am 12.12.2017 um 14:52 schrieb Remi Forax <forax at univ-mlv.fr>:
>> 
>> Hi Hannes,
>> it can also be Nashorn triggering too much deoptimizations creating a
>> deoptimization storm.
> 
> I agree. But given that the problem manifests itself in java.lang.invoke I think
> the first step is to understand what is going wrong there. Without a better
> understanding of the problem it is very hard to provide provide any help.
> 
> Hannes
> 
> 
>> Rémi
>> 
>> ----- Mail original -----
>>> De: "Hannes Wallnöfer" <hannes.wallnoefer at oracle.com>
>>> À: "João Paulo Varandas" <joaovarandas at inpaas.com>
>>> Cc: nashorn-dev at openjdk.java.net
>>> Envoyé: Mardi 12 Décembre 2017 14:11:49
>>> Objet: Re: Any news from JDK-8151981 in Java8 ?
>> 
>>> Hi João,
>>> 
>>> this functionality is part of java.lang.invoke package, not Nashorn, so we can’t
>>> help you here.
>>> 
>>> The best place to ask about this would be the core-libs-dev mailing list.
>>> 
>>> Regards,
>>> Hannes
>>> 
>>> 
>>>> Am 11.12.2017 um 23:07 schrieb João Paulo Varandas <joaovarandas at inpaas.com>:
>>>> 
>>>> Hi guys!
>>>> 
>>>> We are also experiencing some odd issues here with setCallSiteTargetNormal.
>>>> https://bugs.openjdk.java.net/browse/JDK-8151981
>>>> 
>>>> Our cenario is:
>>>> 
>>>> - Web Application using Tomcat;
>>>> - 8 HTTP Threads;
>>>> - A single ScriptEngine for the whole application;
>>>> 
>>>> When a request hits the server, that request may be processed by a Nashorn
>>>> Script, this script is evaluated during runtime, run queries (Jdbc), and
>>>> return results (Maps and/or Collections) that are serialized to JSON before
>>>> being written to the response.
>>>> 
>>>> The problem is... sometimes 7 or more threads are getting stuck in the
>>>> setCallSiteTargetNormal and I have no clue why is that happening. Could you
>>>> guys help me out troubleshooting this? - Or, if there's a bug, what are the
>>>> recomended fixes I should do?
>>>> 
>>>> 
>>>> By the way, those are not freshly created ScriptEngines (which differ from
>>>> the normal issues related in the internet).
>>>> 
>>>> --
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