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grondo merged 1 commit into from
Jun 4, 2026
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Update from release-docs-2026-06-04 #194

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62 changes: 62 additions & 0 deletions _posts/2026-06-03-flux-core-0.86.0.md
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---
title: flux-core v0.86.0
date: 2026-06-03 00:00:00
author: "flux-framework"
categories: 'release'
version: 0.86.0
download: https://github.com/flux-framework/flux-core/releases/download/v0.86.0/flux-core-0.86.0.tar.gz
---

Download from GitHub [here]({{ page.download }})

# Release Notes

flux-core version 0.86.0 - 2026-06-03
-------------------------------------

## New Features
* resource: support checkpoint and eventlog truncation ([#7594](https://github.com/flux-framework/flux-core/issues/7594))
* cmd: add `flux admin system-scripts` to list status and details of prolog,
epilog, and housekeeping configuration ([#7640](https://github.com/flux-framework/flux-core/issues/7640))
* broker: add `broker.conf-builtin` RPC ([#7642](https://github.com/flux-framework/flux-core/issues/7642))
* python: support namespace package extension via pkgutil ([#7633](https://github.com/flux-framework/flux-core/issues/7633))
* python: add optional `output_callback` to `JobWatcher` ([#7628](https://github.com/flux-framework/flux-core/issues/7628))
* cmd: fall back to `PATH` when searching for `flux-*` subcommands ([#7631](https://github.com/flux-framework/flux-core/issues/7631))
* support launching test Flux instances with fake resources ([#7619](https://github.com/flux-framework/flux-core/issues/7619))
* use zeromq zerocopy for message parts >= 64kB ([#7613](https://github.com/flux-framework/flux-core/issues/7613))

## Fixes
* shell: limit job input written to the KVS to 10M ([#7650](https://github.com/flux-framework/flux-core/issues/7650))
* librlist: fix overzealous GPU duplicate check when loading topology ([#7647](https://github.com/flux-framework/flux-core/issues/7647))
* sdexec: avoid error message truncation ([#7635](https://github.com/flux-framework/flux-core/issues/7635))
* flux-job: provide exception message for debugged jobs that fail before
start ([#7638](https://github.com/flux-framework/flux-core/issues/7638))
* kvs: fix memory leak on namespace lookup failure ([#7622](https://github.com/flux-framework/flux-core/issues/7622))
* cmd: fix handling of Python subcommands when searching `PATH` ([#7636](https://github.com/flux-framework/flux-core/issues/7636))
* python: re-export full stdlib API for flux.utils.dataclasses ([#7632](https://github.com/flux-framework/flux-core/issues/7632))
* scheduler: relax `pool_class` subclass check ([#7626](https://github.com/flux-framework/flux-core/issues/7626))
* python: JournalConsumer: only set R and jobspec on alloc and submit
events ([#7630](https://github.com/flux-framework/flux-core/issues/7630))
* librlist: allow missing HostName in hwloc XML ([#7629](https://github.com/flux-framework/flux-core/issues/7629))
* improve error messages when sdexec-mapper fails to map cores or GPUs
([#7618](https://github.com/flux-framework/flux-core/issues/7618))
* shell: fix potential NULL deref in rexec server shutdown path ([#7620](https://github.com/flux-framework/flux-core/issues/7620))
* broker: fix debug logging of module loader pid ([#7616](https://github.com/flux-framework/flux-core/issues/7616))
* python: improve handling of the `sort:` prefix in `UtilFormat` ([#7602](https://github.com/flux-framework/flux-core/issues/7602))
* python: fix `ply` ImportError ([#7591](https://github.com/flux-framework/flux-core/issues/7591))

## Cleanup
* gitignore: many additions throughout ([#7614](https://github.com/flux-framework/flux-core/issues/7614))

## Build/CI/Testsuite/Documentation
* doc: update jansson version refs in documentation ([#7652](https://github.com/flux-framework/flux-core/issues/7652))
* build: fix missing shebangs and non-executable scripts ([#7643](https://github.com/flux-framework/flux-core/issues/7643))
* github: bump the github-actions group with 6 updates ([#7648](https://github.com/flux-framework/flux-core/issues/7648))
* doc: remove `-B` as `--broker-opts` short option ([#7645](https://github.com/flux-framework/flux-core/issues/7645))
* README: add R&D100 badge ([#7641](https://github.com/flux-framework/flux-core/issues/7641))
* .github: conditionally evaluate testenv build strategy ([#7639](https://github.com/flux-framework/flux-core/issues/7639))
* .github: add "all" keyword to rebuild all testenv containers in workflow
([#7586](https://github.com/flux-framework/flux-core/issues/7586))
* ci: fix push of `flux-core:latest` and `fluxoroma` docker images ([#7608](https://github.com/flux-framework/flux-core/issues/7608))
* t: do not use "python" in command similarity test ([#7610](https://github.com/flux-framework/flux-core/issues/7610))