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a

Andrew Wetmore
Assistant VP, Marketing and Publicity, The ASF <https://apache.org>
Editor-Writer, Infra team, The ASF

Editor, moosehousepress.com


On Wed, Jan 28, 2026 at 11:11 AM Tamás Cservenák <[email protected]>
wrote:

> Howdy,
>
> I made a somewhat big change in the very first paragraph: this is not
> a Maven "bug", but the change happened in Maven revealed a
> "concurrency bug" in Nexus 2. It is not Maven that wrongly creates
> multiple staging repositories, but it is Nexus.
>
> I think the same is worded in Maven GH issue too:
> https://github.com/apache/maven/issues/11634
>
> "Due to improvements in parallel PUT method ... bugs of concurrency
> processing in some repository managers can be disclosed."
>
> Thanks
> T
>
> On Wed, Jan 28, 2026 at 3:51 PM Andrew Wetmore <[email protected]>
> wrote:
> >
> > I have drafted a blog post based on what I have learned. If Tamás or
> others could review it, I would be very grateful
> >
> >
> https://docs.google.com/document/d/1eQlnCIP_HN5-4Q3kNZtMKkdPE1mi7Cq5DzpdUYBqyOY/edit?usp=drive_link
> >
> > a
> >
> >
> > Andrew Wetmore
> > Assistant VP, Marketing and Publicity, The ASF
> > Editor-Writer, Infra team, The ASF
> >
> > Editor, moosehousepress.com
> >
> >
> > On Tue, Jan 27, 2026 at 10:28 AM Andrew Wetmore <[email protected]>
> wrote:
> >>
> >> Very helpful. Thank you!
> >>
> >>
> >> Andrew Wetmore
> >> Assistant VP, Marketing and Publicity, The ASF
> >> Editor-Writer, Infra team, The ASF
> >>
> >> Editor, moosehousepress.com
> >>
> >>
> >> On Tue, Jan 27, 2026 at 10:27 AM Tamás Cservenák <[email protected]>
> wrote:
> >>>
> >>> (sent too quickly)
> >>>
> >>> Hence, it must be passed as _user property_ to the Maven instance
> >>> doing deploy (against staging endpoint):
> >>> * can be done as in ASF Parent POM (release plugin passes it to
> >>> invoked Maven instance performing deploy to RAO)
> >>> * can be done by adding `-Daether.connector.basic.parallelPut=false`
> >>> user property on CLI
> >>> * can be done by adding file in project root `.mvn/maven.config` with
> >>> contents `-Daether.connector.basic.parallelPut=false` (see
> >>> https://maven.apache.org/configure.html#mvn-maven-config-file)
> >>> * can be done in user ~/.m2/settings.xml by adding a property to a
> >>> profile that is always enabled
> >>>
> >>> Thanks
> >>> T
> >>>
> >>> On Tue, Jan 27, 2026 at 3:22 PM Tamás Cservenák <[email protected]>
> wrote:
> >>> >
> >>> > Howdy,
> >>> >
> >>> > Workaround (done in ASF Parent POM 37) is to disable parallel PUTs.
> >>> > See
> https://maven.apache.org/resolver-archives/resolver-1.9.25/configuration.html
> >>> > and look for the configuration key
> `aether.connector.basic.parallelPut`.
> >>> >
> >>> > Note: this is a resolver property, and cannot be set as POM project
> property!
> >>> > The workaround implemented in ASF Parent POM passes it to the
> release plugin,
> >>> > that _invokes_ Maven to perform release on the checkout.
> >>> >
> >>> > HTH
> >>> > Tamas
> >>> >
> >>> > On Tue, Jan 27, 2026 at 3:13 PM Andrew Wetmore <[email protected]>
> wrote:
> >>> > >
> >>> > > Hi:
> >>> > >
> >>> > > https://issues.apache.org/jira/browse/INFRA-27597 is about an
> issue in
> >>> > > Maven 3.9.1.2 causing problems with parallel uploads in a build.
> Infra
> >>> > > would like to put out an announcement about the issue and its
> workaround,
> >>> > > and I wonder if someone can help me with the wording.
> >>> > >
> >>> > > At the moment, what I think I understand:
> >>> > >
> >>> > > -- trying to build using parallel uploads causes Maven to create
> multiple
> >>> > > staging repos instead of a single one
> >>> > > -- The issue will be fixed in upcoming Maven versions
> >>> > > -- There is a workaround in ASF Parent POM 37
> >>> > >
> >>> > > Can you explain to me (a mere writer) what the workaround is and
> how a
> >>> > > project release manager would deploy it?
> >>> > >
> >>> > > Thanks in advance!
> >>> > >
> >>> > >
> >>> > > Andrew Wetmore
> >>> > > Assistant VP, Marketing and Publicity, The ASF <https://apache.org
> >
> >>> > > Editor-Writer, Infra team, The ASF
> >>> > >
> >>> > >
> >>> > > <
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