Hi Konrad,

citing the linked web site: "Local named locks are only suited within one JVM 
with a multithreaded build. Sharing a local repository between multiple Maven 
processes (i.e., on a busy CI server) requires a distributed named lock!"

Best Regards 
Mirko Friedenhagen
— 
Sent from my mobile

Am 21.06.22 um 10:20 schrieb Konrad Windszus

> Thanks for that suggestion. I know about that workaround. But to speed up 
> builds and to reduce disk space usage I would really like to use a shared 
> repo.
> 
> I was wondering if there is any experience with the simple "file-lock” [1]. 
> That has the advantage that it doesn’t need additional libraries (IIUC). 
> Configuration should be as easy as setting “aether.syncContext.named.factory” 
> to “file-lock” [2]. Unfortunately even Maven 3.8.6 still ships with Resolver 
> 1.6.3 [3] and it seems the suggested branch 
> https://github.com/apache/maven/commits/maven-3.8.x-resolver-1.7.x is a bit 
> outdated now…
> 
> Konrad
> 
> [1] - 
> https://github.com/apache/maven-resolver/blob/2af7bff2a5238bf2597cd7a46b60a12779ee31a3/maven-resolver-named-locks/src/main/java/org/eclipse/aether/named/providers/FileLockNamedLockFactory.java
> [2] - https://maven.apache.org/resolver/configuration.html
> [3] - https://maven.apache.org/components/resolver/maven-3.8.x.html
> 
> 
> > On 21. Jun 2022, at 10:01, Lasse Lindqvist <lasse.k.lindqv...@gmail.com> 
> > wrote:
> > 
> > Hi. If you want to have pipeline build safely, you also have an
> > alternative. With the withMaven clause (Pipeline Maven Integration Plugin)
> > you can use something like
> > 
> > 
> > 
> > *withMaven(maven: 'Maven123', mavenLocalRepo:
> > '$WORKSPACE/../../.m2/$EXECUTOR_NUMBER/repository') { // Run my Maven
> > commands here*
> > * }*
> > It will use the workspace folder, travel out of it to a parent location and
> > make a sibling .m2 folder and unique subfolder there based on the executor
> > number. This way the folders used are executor specific and there will be
> > no concurrency problems. The downside is that it will use more disk space
> > because many artifacts are stored multiple times.
> > 
> > ti 21. kesäk. 2022 klo 10.51 Konrad Windszus (k...@apache.org) kirjoitti:
> > 
> >> Hi,
> >> By default Jenkins uses a global Maven repository which is accessed in
> >> parallel by multiple jobs running in dedicated VMs. To prevent race
> >> conditions one should probably configure one of the distributed named locks
> >> outlined in
> >> https://maven.apache.org/resolver/maven-resolver-named-locks/index.html <
> >> https://maven.apache.org/resolver/maven-resolver-named-locks/index.html>.
> >> Is there any recommendation which one to pick and also some concrete hints
> >> how to set that up with Jenkins (Pipelines, leveraging
> >> https://www.jenkins.io/doc/pipeline/steps/pipeline-maven/ <
> >> https://www.jenkins.io/doc/pipeline/steps/pipeline-maven/>)
> >> 
> >> Is ASF Jenkins using named locks already?
> >> Thanks for any pointers
> >> 
> >> Konrad
> >> 
> >> 
> 
> 
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