Re: STRUTS_EXAMPLES_1_1_0

Andrea, would you mind creating a JIRA ticket targeting Struts 6 and
describing the problem?

pt., 28 lut 2025 o 21:51 Ing. Andrea vettori <[email protected]> napisał(a):
>
> We have a few web apps on each server (and a few servers) with a load balancer in front of everything. It’s a convenience to be able to hot deploy an app without turning the entire server off. With the amount of classes that leak we get oom on metaspace very frequently.
> —
> Ing. Andrea Vettori
> Sistemi informativi
>
> > Il giorno 28 feb 2025, alle ore 20:06, Greg Huber <[email protected]> ha scritto:
> >
> > As a matter of interest why would you be repeatedly redeploying your app in production if you are not using it?
> >
> >> On 28/02/2025 15:14, Ing. Andrea Vettori wrote:
> >> Do I have to open a bug report or is this thread sufficient such that someone with look into it ?
> >> Thank you for your help on this issue
> >>
> >>>> On 28 Feb 2025, at 16:09, Greg Huber <[email protected]> wrote:
> >>>
> >>> Confirming, the leak is present on v6 struts an on jdk 8,11 and 17.
> >>>
> >>> ....At last we can reproduce the problem easily.
> >>>
> >>> The following web applications were stopped (reloaded, undeployed), but their
> >>> classes from previous runs are still loaded in memory, thus causing a memory
> >>> leak (use a profiler to confirm):
> >>> /helloworld
> >>> /helloworld
> >>> /helloworld
> >>>
> >>>> On 28/02/2025 15:02, Ing. Andrea Vettori wrote:
> >>>
> >>>> I didn’t touch that setting.
> >>>> If I check a class file from the war I find it has target 17 (version 61)
> >>>>
> >>>> javap -verbose HelloWorldAction.class
> >>>>
> >>>>   Compiled from "HelloWorldAction.java"
> >>>> public class org.apache.struts.helloworld.action.HelloWorldAction extends com.opensymphony.xwork2.ActionSupport
> >>>>   minor version: 0
> >>>>   major version: 61
> >>>>
> >>>> Are you saying that it doesn’t leak if you compile it with target jdk 17 ?
> >>>>
> >>>> Thanks
> >>>>
> >>>>
> >>>>> On 28 Feb 2025, at 15:46, Greg Huber <[email protected]> wrote:
> >>>>>
> >>>>> |It seems to me that you’ve compiled struts example war with one jdk and are running tomcat with a different one?
> >>>>> |I did everything with the same jdk version, to be precise it is
> >>>>>
> >>>>>  The parent has:
> >>>>>
> >>>>> <maven.compiler.source>17</maven.compiler.source>
> >>>>> <maven.compiler.target>17</maven.compiler.target>
> >>>>> <struts2.version>6.3.0.2</struts2.version>
> >>>>>
> >>>>> If I change this to 1.8, and test, (on  8,11,17) I do get the leak when undeploying a few times :
> >>>>>
> >>>>> The following web applications were stopped (reloaded, undeployed), but their
> >>>>> classes from previous runs are still loaded in memory, thus causing a memory
> >>>>> leak (use a profiler to confirm):
> >>>>> /helloworld
> >>>>> /helloworld
> >>>>> /helloworld
> >>>>>
> >>>>>
> >>>>> On 28/02/2025 14:34, Ing. Andrea Vettori wrote:
> >>>>>> It seems to me that you’ve compiled struts example war with one jdk and are running tomcat with a different one?
> >>>>>> I did everything with the same jdk version, to be precise it is
> >>>>>>
> >>>>>> openjdk version "17.0.14" 2025-01-21
> >>>>>> OpenJDK Runtime Environment Temurin-17.0.14+7 (build 17.0.14+7)
> >>>>>> OpenJDK 64-Bit Server VM Temurin-17.0.14+7 (build 17.0.14+7, mixed mode, sharing)
> >>>>>>
> >>>>>>
> >>>>>>> On 28 Feb 2025, at 15:28, Greg Huber<[email protected]> wrote:
> >>>>>>>
> >>>>>>> Well it only likes jkd17?  Should this be jdk8 as its v6?
> >>>>>>>
> >>>>>>> java.lang.UnsupportedClassVersionError: org/apache/struts/helloworld/action/HelloWorldAction has been compiled by a more recent version of the Java Runtime (class file version 61.0), this version of the Java Runtime only recognizes class file versions up to 52.0 (unable to load class [org.apache.struts.helloworld.action.HelloWorldAction])
> >>>>>>>
> >>>>>>> On 28/02/2025 13:14, Ing. Andrea Vettori wrote:
> >>>>>>>> I tried to use STRUTS_EXAMPLES_1_1_0 and I get two ApplicationContext in memory on jdk17 and tomcat 9.0.100 when doing a redeploy either using manager reload or simply coping the war file.
> >>>>>>>>
> >>>>>>>> Using tomcat manager I get the following message using the ‘Find Leaks’ button:
> >>>>>>>>
> >>>>>>>> The following web applications were stopped (reloaded, undeployed), but their
> >>>>>>>> classes from previous runs are still loaded in memory, thus causing a memory
> >>>>>>>> leak (use a profiler to confirm):
> >>>>>>>> /hello-world
> >>>>>>>>
> >>>>>>>> Can anyone confirm that he gets the same results when using the same versions ?
> >>>>>>>> Thanks
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>> On 28 Feb 2025, at 12:04, Lukasz Lenart<[email protected]> wrote:
> >>>>>>>>>
> >>>>>>>>> pt., 28 lut 2025 o 11:55 Greg Huber<[email protected]> napisał(a):
> >>>>>>>>>> Maybe comparing your test case with the showcase setup may give a hint
> >>>>>>>>>> on a config issue.
> >>>>>>>>>>
> >>>>>>>>>> @Lukasz do we need a tag for the last javax examples?
> >>>>>>>>> https://github.com/apache/struts-examples/tree/STRUTS_EXAMPLES_1_1_0
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>> Cheers
> >>>>>>>>> Łukasz
> >>>>>>>>>
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