thanks let me know once you know more…. > On 22 Jul 2016, at 12:53, Alexander Lehmann <[email protected]> wrote: > > I will try to set up a cloudbees build using the netty pr (should work > without snapshot version) > > On Friday, July 22, 2016 at 12:40:18 PM UTC+2, Julien Viet wrote: > Can you deploy a snapshot in sonatype repi with a specific classifier? that > would help for testing in cloudbees > > > Le 22 Jul 2016 à 12:04, 'Norman Maurer' via Netty discussions > > <[email protected] <javascript:>> a écrit : > > > > Could you test : > > > > https://github.com/netty/netty/pull/5569 > > <https://github.com/netty/netty/pull/5569> > > > > ? > > > >> Am 22.07.2016 um 11:58 schrieb Julien Viet <[email protected] > >> <javascript:>>: > >> > >> Yes with branch netty-4.1.3.Final > >> > >>> Le 22 Jul 2016 à 09:21, 'Norman Maurer' via Netty discussions > >>> <[email protected] <javascript:>> a écrit : > >>> > >>> Yes this sounds not right… So what are the steps to reproduce ? Fire up a > >>> vm, checkout vert.x master and run the build ? > >>> > >>> > >>>> On 22 Jul 2016, at 00:51, Julien Viet <[email protected] > >>>> <javascript:>> wrote: > >>>> > >>>> Hi, > >>>> > >>>> we are seing OOM "GC overhead limit exceeded" issue in Vert.x test > >>>> suite on slow machines like Cloudbees or using virtualization on a > >>>> laptop. > >>>> > >>>> This issue means that the VM spend more time in GC than the rest of the > >>>> VM (98%), but I’m pretty sure everyone here knows that already. > >>>> > >>>> In the case of Vert.x testsuite, it happens because we create and > >>>> destroy many Vertx instances and therefore many event loops / threads > >>>> during the tests. > >>>> > >>>> I spent quite some time on the issue and I found that it happens because > >>>> the ThreadDeatchWatcher's Recycler DELAYED_RECYCLE fast thread local is > >>>> a WeakHashMap<Stack, WeakOrderQueue) used by the ThreadPoolCache grows > >>>> and retains many entries (up to 2000). This WeakHashMap contains > >>>> recycled objects with large footprint and also the Stack itself > >>>> reference its Thread that has a large footprint. > >>>> > >>>> I am not saying it is a leak per se, but the maps grows and takes time > >>>> to be garbaged. This does not prevent the testsuite to run on a laptop > >>>> but it slows it down and on a slow machines it prevents running the > >>>> testsuite entirely. > >>>> > >>>> I believe this behavior was introduced by this commit : > >>>> https://github.com/netty/netty/commit/afafadd3d7caf1e4b346da049baab0afeae0a4bc > >>>> > >>>> <https://github.com/netty/netty/commit/afafadd3d7caf1e4b346da049baab0afeae0a4bc> > >>>> > >>>> > >>>> The change that makes the whole difference is : > >>>> https://github.com/netty/netty/commit/afafadd3d7caf1e4b346da049baab0afeae0a4bc#diff-23eafd00fcd66829f8cce343b26c236aR226 > >>>> > >>>> <https://github.com/netty/netty/commit/afafadd3d7caf1e4b346da049baab0afeae0a4bc#diff-23eafd00fcd66829f8cce343b26c236aR226> > >>>> > >>>> > >>>> The introduction of the field stack in the WeakOrderQueue keeps a > >>>> reference on the Stack objects, however Stack instances are also weak > >>>> keys of the fast thread local WeakHashMap and therefore defeats the > >>>> purpose of the WeakHashMap. Not entirely as it is GC’ed but much less > >>>> often and increase the memory footprint. > >>>> > >>>> let me know what you think > >>>> > >>>> Julien > >>>> > >>>> -- > >>>> You received this message because you are subscribed to the Google > >>>> Groups "Netty discussions" group. > >>>> To unsubscribe from this group and stop receiving emails from it, send > >>>> an email to [email protected] <javascript:>. > >>>> To view this discussion on the web visit > >>>> https://groups.google.com/d/msgid/netty/2A547499-D279-4286-AA95-3447EE2B621E%40julienviet.com > >>>> > >>>> <https://groups.google.com/d/msgid/netty/2A547499-D279-4286-AA95-3447EE2B621E%40julienviet.com>. > >>>> > >>>> For more options, visit https://groups.google.com/d/optout > >>>> <https://groups.google.com/d/optout>. > >>> > >>> -- > >>> You received this message because you are subscribed to the Google Groups > >>> "Netty discussions" group. > >>> To unsubscribe from this group and stop receiving emails from it, send an > >>> email to [email protected] <javascript:>. > >>> To view this discussion on the web visit > >>> https://groups.google.com/d/msgid/netty/D5C167E1-D3C3-4B8F-B4B8-FD4D1793BC1F%40googlemail.com > >>> > >>> <https://groups.google.com/d/msgid/netty/D5C167E1-D3C3-4B8F-B4B8-FD4D1793BC1F%40googlemail.com>. > >>> > >>> For more options, visit https://groups.google.com/d/optout > >>> <https://groups.google.com/d/optout>. > >> > >> -- > >> You received this message because you are subscribed to the Google Groups > >> "Netty discussions" group. > >> To unsubscribe from this group and stop receiving emails from it, send an > >> email to [email protected] <javascript:>. > >> To view this discussion on the web visit > >> https://groups.google.com/d/msgid/netty/14FFE4AD-8D8F-4721-8A1E-C763E1F187DE%40julienviet.com > >> > >> <https://groups.google.com/d/msgid/netty/14FFE4AD-8D8F-4721-8A1E-C763E1F187DE%40julienviet.com>. > >> > >> For more options, visit https://groups.google.com/d/optout > >> <https://groups.google.com/d/optout>. > > > > -- > > You received this message because you are subscribed to the Google Groups > > "Netty discussions" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [email protected] <javascript:>. > > To view this discussion on the web visit > > https://groups.google.com/d/msgid/netty/BC8153A8-4705-438A-BB3F-A5F099FDEAE8%40googlemail.com > > > > <https://groups.google.com/d/msgid/netty/BC8153A8-4705-438A-BB3F-A5F099FDEAE8%40googlemail.com>. > > > > For more options, visit https://groups.google.com/d/optout > > <https://groups.google.com/d/optout>. > > -- > You received this message because you are subscribed to the Google Groups > "Netty discussions" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/netty/ba8ac728-0a91-438f-bf14-bf1080acc760%40googlegroups.com > > <https://groups.google.com/d/msgid/netty/ba8ac728-0a91-438f-bf14-bf1080acc760%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>.
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