[dolphin] [Bug 507327] New: Dolphin leaving orphaned ripgrep searches running

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https://bugs.kde.org/show_bug.cgi?id=507327

            Bug ID: 507327
           Summary: Dolphin leaving orphaned ripgrep searches running
    Classification: Applications
           Product: dolphin
      Version First unspecified
       Reported In:
          Platform: Neon
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: search
          Assignee: dolphin-bugs-null at kde.org
          Reporter: tagwerk19 at innerjoin.org
                CC: kfm-devel at kde.org
  Target Milestone: ---

SUMMARY

    When Dolphin is doing simple searches and using ripgrep, it can leave leave
orphaned
    searches running in the background.

    This is most obvious when searching "Everywhere" (in the new search
interface), where
    the search is looking at the whole disk.

STEPS TO REPRODUCE:

1...
    Install ripgrep and make sure Dolphin is using it.

2...
    Run your favourite process monitor: I open a command window, run htop and
make
    sure the window is wide enough to see the details of the processes.

3...
    Open Dolphin, type <ctrl>F to get the search box, make sure you are using
"Simple
    Search" in Filter and "File Contents", select "Everywhere" and...

4...
    Slowly type a search expression, do this with pauses, times to think,
mistpyings and
    corrections. You'll see the "Searching..." animation in the bottom right
corner of
    Dolphin.

5...
    Watch htop...

OBSERVED RESULT:

    You will see more than one copy of "rg" running (you see two copies running
for each
    search, that's expected), but as you pause, mistpye and correct you will
see more
    copies of "rg" being started with the new search expressions. Sometimes you
will see
    a running "rg" disappear and be replaced by a new copy (with the new search
    expression), however in a large number of times, the old copy will be
orphaned and
    continue running.

    You can get to the state where there are more searches running than cores
and
    searching take the complete CPU. Searches slow considerably...

    You can close Dolphin and the processes stay running.

EXPECTED RESULT:

    Dolphin should track which processes it is running and kill processes that
it no
    longer needs.

SOFTWARE/OS VERSIONS:

    KDE Neon Unstable
    Plasma: 6.4.80
    Frameworks: 6.17.0
    Qt: 6.9.1
    Dolphin: 25.11.70

ADDITIONAL INFORMATION:

    There doesn't seem to be a problem on a system without ripgrep.

    The problem is less obvious when searching "From Here" as opposed to from
    "Everywhere", maybe because the ripgreps complete more quickly.

    You can see in htop that the "rg" processes are running with normal
priority.

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