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From Raymond Wilson <raymond_wil...@trimble.com>
Subject Re: .NET java thread count keeps growing
Date Thu, 19 Sep 2019 23:35:34 GMT
Thanks Pavel!

Will look out for it :)

On Fri, Sep 20, 2019 at 12:52 AM Pavel Tupitsyn <ptupitsyn@apache.org>
wrote:

> Good news, everyone, I've found a straightforward fix for this,
> cross-platform and in pure C#.
> Will be included in Ignite 2.8. Details in the ticket.
>
> Thanks
>
> On Mon, Aug 19, 2019 at 11:20 PM Pavel Tupitsyn <ptupitsyn@apache.org>
> wrote:
>
>> Denis, the problem is described in
>> https://issues.apache.org/jira/browse/IGNITE-9638
>> It is not specific to Continuous Queries.
>> It occurs when user code starts new threads a lot and calls Ignite APIs
>> from there (which is not common, since idiomatic .NET code should use
>> built-in thread pool instead).
>>
>> I investigated it thoroughly last year and, unfortunately, did not find a
>> clean, cross-platform solution - see my comment in Jira.
>> We'll have to develop a fix for every platform (Linux, Windows, Mac)
>> separately in C or C++, compile native binaries and ship them as part of
>> Ignite.NET or as a dependency.
>>
>>
>>
>>
>>
>> On Mon, Aug 19, 2019 at 2:04 PM Denis Magda <dmagda@apache.org> wrote:
>>
>>> Ilya, thanks for bringing up the discussion.
>>>
>>> Pavel, did you have a chance to asses the problem? Is it specific to
>>> asynchronous CQ (as reported on SO) or spans across many APIs?
>>>
>>> -
>>> Denis
>>>
>>>
>>> On Sat, Aug 17, 2019 at 5:16 PM Raymond Wilson <
>>> raymond_wilson@trimble.com>
>>> wrote:
>>>
>>> > We have observed a similar problem but have not characterised it well
>>> > enough to report on the list yet.
>>> >
>>> > We are using IA .Net 2.7.5.
>>> >
>>> > Sent from my iPhone
>>> >
>>> > > On 17/08/2019, at 1:45 PM, Ilya Kasnacheev <
>>> ilya.kasnacheev@gmail.com>
>>> > wrote:
>>> > >
>>> > > Hello!
>>> > >
>>> > > Can we get back to this question? It rears its ugly head again:
>>> > >
>>> >
>>> https://stackoverflow.com/questions/57513576/apache-ignite-spawns-too-much-threads/57523214
>>> > >
>>> > > Regards,
>>> > > --
>>> > > Ilya Kasnacheev
>>> > >
>>> > >
>>> > > вс, 23 сент. 2018 г. в 15:20, Pavel Tupitsyn <ptupitsyn@apache.org>:
>>> > >
>>> > >> Denis,
>>> > >>
>>> > >> Can't say for sure, did not investigate this yet. I'll try to find
>>> time
>>> > >> next week and get back to you.
>>> > >>
>>> > >>> On Sat, Sep 22, 2018 at 4:23 AM Denis Magda <dmagda@apache.org>
>>> wrote:
>>> > >>>
>>> > >>> Pavel,
>>> > >>>
>>> > >>> Do you think we can get it fixed in 2.7 time frame?
>>> > >>>
>>> > >>> --
>>> > >>> Denis
>>> > >>>
>>> > >>> ---------- Forwarded message ---------
>>> > >>> From: Ilya Kasnacheev <ilya.kasnacheev@gmail.com>
>>> > >>> Date: Tue, Sep 18, 2018 at 9:30 AM
>>> > >>> Subject: Re: .NET java thread count keeps growing
>>> > >>> To: <user@ignite.apache.org>
>>> > >>>
>>> > >>>
>>> > >>> Hello!
>>> > >>>
>>> > >>> I can observe the problem that you are describing. I have created
a
>>> > >> ticket
>>> > >>> https://issues.apache.org/jira/browse/IGNITE-9638
>>> > >>>
>>> > >>> Regards,
>>> > >>> --
>>> > >>> Ilya Kasnacheev
>>> > >>>
>>> > >>>
>>> > >>> пн, 17 сент. 2018 г. в 20:21, Alew <alewmt@gmail.com>:
>>> > >>>
>>> > >>>> Hi, I found a way to reproduce the issue.
>>> > >>>>
>>> > >>>> I think it is related to .net thread identity.
>>> > >>>>
>>> > >>>> New .net thread leads to new java thread.
>>> > >>>>
>>> > >>>>
>>> > >>>>
>>> > >>>> On 17/09/2018 15:04, Ilya Kasnacheev wrote:
>>> > >>>>
>>> > >>>> Hello!
>>> > >>>>
>>> > >>>> You seem to have 3000 threads of form "Thread-NNNN", which
is not
>>> what
>>> > >>>> Ignite usually uses, and they're all empty.
>>> > >>>> This is mysterious so I urge you to share the sample reproducer
>>> (or,
>>> > >>>> barring that, code snippet) that leads to such behavior.
>>> > >>>>
>>> > >>>> By the way, do you observe any errors in the log?
>>> > >>>>
>>> > >>>> Regards,
>>> > >>>> --
>>> > >>>> Ilya Kasnacheev
>>> > >>>>
>>> > >>>>
>>> > >>>> вс, 16 сент. 2018 г. в 4:09, Alew <alewmt@gmail.com>:
>>> > >>>>
>>> > >>>>> Hi!
>>> > >>>>>
>>> > >>>>> I have growing java thread count. The application crashes
with
>>> OOME.
>>> > >> The
>>> > >>>>> application is very simple, only reading values in
a cache.
>>> > >>>>>
>>> > >>>>> Any suggestion to debug this issue?
>>> > >>>>>
>>> > >>>>> Ignite 2.4
>>> > >>>>>
>>> > >>>>>
>>> > >>>>>
>>> > >>>>
>>> > >>
>>> >
>>>
>>

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