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]> a écrit : > > Could you test : > > https://github.com/netty/netty/pull/5569 > > ? > >> Am 22.07.2016 um 11:58 schrieb Julien Viet <[email protected]>: >> >> Yes with branch netty-4.1.3.Final >> >>> Le 22 Jul 2016 à 09:21, 'Norman Maurer' via Netty discussions >>> <[email protected]> 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]> 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 >>>> >>>> The change that makes the whole difference is : >>>> 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]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/netty/2A547499-D279-4286-AA95-3447EE2B621E%40julienviet.com. >>>> For more options, visit 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]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/netty/D5C167E1-D3C3-4B8F-B4B8-FD4D1793BC1F%40googlemail.com. >>> For more options, visit 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]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/netty/14FFE4AD-8D8F-4721-8A1E-C763E1F187DE%40julienviet.com. >> For more options, visit 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]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/netty/BC8153A8-4705-438A-BB3F-A5F099FDEAE8%40googlemail.com. > For more options, visit 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/netty/EB11694F-03CB-4318-842B-620EF5BFC662%40julienviet.com. For more options, visit https://groups.google.com/d/optout.
