package scala-2.10.6-16.fc31.noarch is filtered out by modular filtering

[Norman Gaywood]

After updating a Fedora 30 system to 31, I can't install scala:
# dnf module list scala
Last metadata expiration check: 0:31:21 ago on Mon 06 Jan 2020 13:31:04
AEDT.
@modulefailsafe
Name                       Stream                        Profiles
           Summary

scala                      2.10 [e]                      default
            A hybrid functional/object-oriented language for the JVM

Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
# dnf install scala
Last metadata expiration check: 0:31:32 ago on Mon 06 Jan 2020 13:31:04
AEDT.
All matches were filtered out by modular filtering for argument: scala
Error: Unable to find a match: scala

If I try to install a package that depends on scala:
 # dnf install ant-scala
Last metadata expiration check: 0:32:13 ago on Mon 06 Jan 2020 13:31:04
AEDT.
Error:
 Problem: package ant-scala-2.10.6-16.fc31.noarch requires scala =
2.10.6-16.fc31, but none of the providers can be installed
  - conflicting requests
  - package scala-2.10.6-16.fc31.noarch is filtered out by modular filtering
(try to add '--skip-broken' to skip uninstallable packages)

How can I find out why scalar is being "filtered out by modular filtering"?

This is an updated fc30->fc31 system. A clean install of fc31 will install
scala OK.

[Ed Greshko]

On 2020-01-06 12:32, Norman Gaywood wrote:
> After updating a Fedora 30 system to 31, I can't install scala:
> # dnf module list scala
> Last metadata expiration check: 0:31:21 ago on Mon 06 Jan 2020 13:31:04 AEDT.
> @modulefailsafe
> Name                       Stream                        Profiles                      Summary                                                                    
> scala                      2.10 [e]                      default                       A hybrid functional/object-oriented language for the JVM
>
> Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
> # dnf install scala
> Last metadata expiration check: 0:31:32 ago on Mon 06 Jan 2020 13:31:04 AEDT.
> All matches were filtered out by modular filtering for argument: scala
> Error: Unable to find a match: scala
>
> If I try to install a package that depends on scala:
>  # dnf install ant-scala
> Last metadata expiration check: 0:32:13 ago on Mon 06 Jan 2020 13:31:04 AEDT.
> Error:
>  Problem: package ant-scala-2.10.6-16.fc31.noarch requires scala = 2.10.6-16.fc31, but none of the providers can be installed
>   - conflicting requests
>   - package scala-2.10.6-16.fc31.noarch is filtered out by modular filtering
> (try to add '--skip-broken' to skip uninstallable packages)
>
> How can I find out why scalar is being "filtered out by modular filtering"?
>
> This is an updated fc30->fc31 system. A clean install of fc31 will install scala OK.

It can be accomplished in the follow manner.....  (errors included for clarity)
I upgraded my F30Xfce VM after enable of the scala module.

[root@f30x ~]# dnf module list scala
Last metadata expiration check: 0:01:23 ago on Mon 06 Jan 2020 02:23:56 PM CST.
@modulefailsafe
Name   Stream    Profiles Summary                                                
scala  2.10 [e]  default  A hybrid functional/object-oriented language for the JVM

Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled

[root@f30x ~]# dnf install ant-scala
Last metadata expiration check: 0:01:30 ago on Mon 06 Jan 2020 02:23:56 PM CST.
Error:
 Problem: package ant-scala-2.10.6-16.fc31.noarch requires scala = 2.10.6-16.fc31, but none of the providers can be installed
  - conflicting requests
  - package scala-2.10.6-16.fc31.noarch is filtered out by modular filtering
(try to add '--skip-broken' to skip uninstallable packages)

[root@f30x ~]# dnf module disable scala   <--------DISABLE the module
 
Last metadata expiration check: 0:01:47 ago on Mon 06 Jan 2020 02:23:56 PM CST.
Dependencies resolved.
==================================================================================
 Package            Architecture      Version            Repository          Size
==================================================================================
Disabling modules:
 scala

Transaction Summary
==================================================================================

Is this ok [y/N]: y
Complete!

[root@f30x ~]# dnf install ant-scala  
Last metadata expiration check: 0:02:00 ago on Mon 06 Jan 2020 02:23:56 PM CST.
Dependencies resolved.
==================================================================================
 Package            Arch   Version                          Repository       Size
==================================================================================
Installing:
 ant-scala          noarch 2.10.6-16.fc31                   fedora          9.7 k
Installing dependencies:
 ant                noarch 1.10.5-3.module_f28+4207+d722d224
                                                            fedora-modular  192 k
 ant-lib            noarch 1.10.5-3.module_f28+4207+d722d224
                                                            fedora-modular  2.0 M
 hawtjni-runtime    noarch 1.16-2.module_f29+6921+ca3ed728  updates-modular  38 k
 jansi              noarch 1.17.1-1.module_f29+6921+ca3ed728
                                                            updates-modular  75 k
 jansi-native       x86_64 1.7-7.module_f29+6921+ca3ed728   updates-modular  71 k
 java-1.8.0-openjdk x86_64 1:1.8.0.232.b09-0.fc31           updates         281 k
 java-1.8.0-openjdk-headless
                    x86_64 1:1.8.0.232.b09-0.fc31           updates          32 M
 copy-jdk-configs   noarch 3.7-4.fc31                       fedora           24 k
 giflib             x86_64 5.2.1-3.fc31                     fedora           48 k
 javapackages-filesystem
                    noarch 5.3.0-6.fc31                     fedora           11 k
 javapackages-tools noarch 5.3.0-6.fc31                     fedora           32 k
 jline              noarch 2.14.6-5.fc31                    fedora          151 k
 lksctp-tools       x86_64 1.0.16-12.fc31                   fedora           94 k
 lua                x86_64 5.3.5-6.fc31                     fedora          181 k
 lua-posix          x86_64 33.3.1-14.fc31                   fedora          174 k
 scala              noarch 2.10.6-16.fc31                   fedora           22 M
 ttmkfdir           x86_64 3.0.9-57.fc31                    fedora           56 k
 tzdata-java        noarch 2019c-1.fc31                     fedora          157 k
 xorg-x11-fonts-Type1
                    noarch 7.5-23.fc31                      fedora          500 k
Installing weak dependencies:
 java-1.8.0-openjdk-devel
                    x86_64 1:1.8.0.232.b09-0.fc31           updates         9.3 M
Enabling module streams:
 ant                       1.10                                                 
 maven                     3.5

Transaction Summary
==================================================================================
Install  21 Packages

Total download size: 67 M
Installed size: 190 M
Is this ok [y/N]: n
Operation aborted.

[Norman Gaywood]

Thanks for the hint Ed!

So it seems it's enough to:
dnf module disable scala       # disable the scala module
dnf install scala

And scala-2.10.6-16.fc31.noarch is installed!
So disabling the the scala module will allow you to install scala!
????

On Mon, 6 Jan 2020 at 17:30, Ed Greshko  wrote:
> On 2020-01-06 12:32, Norman Gaywood wrote:
> > After updating a Fedora 30 system to 31, I can't install scala:
> > # dnf module list scala
> > Last metadata expiration check: 0:31:21 ago on Mon 06 Jan 2020 13:31:04
>
> AEDT.
> > @modulefailsafe
> > Name                       Stream                        Profiles
>            Summary
>
> > scala                      2.10 [e]                      default
>           A hybrid functional/object-oriented language for the JVM
>
> > Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
> > # dnf install scala
> > Last metadata expiration check: 0:31:32 ago on Mon 06 Jan 2020 13:31:04
>
> AEDT.
> > All matches were filtered out by modular filtering for argument: scala
> > Error: Unable to find a match: scala
> >
> > If I try to install a package that depends on scala:
> >  # dnf install ant-scala
> > Last metadata expiration check: 0:32:13 ago on Mon 06 Jan 2020 13:31:04
>
> AEDT.
> > Error:
> >  Problem: package ant-scala-2.10.6-16.fc31.noarch requires scala =
>
> 2.10.6-16.fc31, but none of the providers can be installed
> > conflicting requests
> > package scala-2.10.6-16.fc31.noarch is filtered out by modular
>
> filtering
> > (try to add '--skip-broken' to skip uninstallable packages)
> >
> > How can I find out why scalar is being "filtered out by modular
>
> filtering"?
> > This is an updated fc30->fc31 system. A clean install of fc31 will
>
> install scala OK.
> >
>
> It can be accomplished in the follow manner.....  (errors included for
> clarity)
> I upgraded my F30Xfce VM after enable of the scala module.
>
> [root@f30x ~]# dnf module list scala
> Last metadata expiration check: 0:01:23 ago on Mon 06 Jan 2020 02:23:56 PM
> CST.
> @modulefailsafe
> Name   Stream    Profiles
> Summary
> scala  2.10 [e]  default  A hybrid functional/object-oriented language for
> the JVM
>
> Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
>
> [root@f30x ~]# dnf install ant-scala
> Last metadata expiration check: 0:01:30 ago on Mon 06 Jan 2020 02:23:56 PM
> CST.
> Error:
>  Problem: package ant-scala-2.10.6-16.fc31.noarch requires scala =
> 2.10.6-16.fc31, but none of the providers can be installed
> conflicting requests
> package scala-2.10.6-16.fc31.noarch is filtered out by modular
>
> filtering
> (try to add '--skip-broken' to skip uninstallable packages)
>
> [root@f30x ~]# dnf module disable scala   <--------DISABLE the module
>
> Last metadata expiration check: 0:01:47 ago on Mon 06 Jan 2020 02:23:56 PM
> CST.
> Dependencies resolved.
>
> ==================================================================================
>  Package            Architecture      Version
> Repository          Size
>
> ==================================================================================
> Disabling modules:
>
> scala
>
> Transaction Summary
>
> ==================================================================================
>
> Is this ok [y/N]: y
> Complete!
>
> [root@f30x ~]# dnf install ant-scala
> Last metadata expiration check: 0:02:00 ago on Mon 06 Jan 2020 02:23:56 PM
> CST.
> Dependencies resolved.
>
> ==================================================================================
>  Package            Arch   Version
> Repository       Size
>
> ==================================================================================
> Installing:
>  ant-scala          noarch 2.10.6-16.fc31
> fedora          9.7 k
> Installing dependencies:
>  ant                noarch 1.10.5-3.module_f28+4207+d722d224
>
> fedora-modular  192 k
>  ant-lib            noarch 1.10.5-3.module_f28+4207+d722d224
>
> fedora-modular  2.0 M
>  hawtjni-runtime    noarch 1.16-2.module_f29+6921+ca3ed728
> updates-modular  38 k
>  jansi              noarch 1.17.1-1.module_f29+6921+ca3ed728
>
> updates-modular  75 k
>  jansi-native       x86_64 1.7-7.module_f29+6921+ca3ed728
> updates-modular  71 k
>  java-1.8.0-openjdk x86_64 1:1.8.0.232.b09-0.fc31
> updates         281 k
>  java-1.8.0-openjdk-headless
>                     x86_64 1:1.8.0.232.b09-0.fc31
> updates          32 M
>  copy-jdk-configs   noarch 3.7-4.fc31
> fedora           24 k
>  giflib             x86_64 5.2.1-3.fc31
> fedora           48 k
>  javapackages-filesystem
>                     noarch 5.3.0-6.fc31
> fedora           11 k
>  javapackages-tools noarch 5.3.0-6.fc31
> fedora           32 k
>  jline              noarch 2.14.6-5.fc31
> fedora          151 k
>  lksctp-tools       x86_64 1.0.16-12.fc31
> fedora           94 k
>  lua                x86_64 5.3.5-6.fc31
> fedora          181 k
>  lua-posix          x86_64 33.3.1-14.fc31
> fedora          174 k
>  scala              noarch 2.10.6-16.fc31
> fedora           22 M
>  ttmkfdir           x86_64 3.0.9-57.fc31
> fedora           56 k
>  tzdata-java        noarch 2019c-1.fc31
> fedora          157 k
>  xorg-x11-fonts-Type1
>                     noarch 7.5-23.fc31
> fedora          500 k
> Installing weak dependencies:
>  java-1.8.0-openjdk-devel
>                     x86_64 1:1.8.0.232.b09-0.fc31
> updates         9.3 M
> Enabling module streams:
>  ant
> 1.10
>  maven
> 3.5
>
> Transaction Summary
>
> ==================================================================================
> Install  21 Packages
>
> Total download size: 67 M
> Installed size: 190 M
> Is this ok [y/N]: n
> Operation aborted.
>
> --
> The key to getting good answers is to ask good questions.
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[Ed Greshko]

On 2020-01-07 07:15, Norman Gaywood wrote:
> So it seems it's enough to:
> dnf module disable scala       # disable the scala module
> dnf install scala
>
> And scala-2.10.6-16.fc31.noarch is installed!
> So disabling the the scala module will allow you to install scala!
> ????

Yes, it seems that in F31 there is no longer a scala module.  That is what created the conflict.