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DAOS-19784 mercury: add NA UCX patch to fix race in EP update - #19343

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soumagne/providers_optfrom
soumagne/ucx_ep_fix

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In workloads such as dfuse, multiple threads accessing the same CART context and issuing RPCs could have led to a race during EP update (after a disconnect/reconnect event).

Steps for the author:

  • Commit message follows the guidelines.
  • Appropriate Features or Test-tag pragmas were used.
  • Appropriate Functional Test Stages were run.
  • At least two positive code reviews including at least one code owner from each category referenced in the PR.
  • Testing is complete. If necessary, forced-landing label added and a reason added in a comment.

After all prior steps are complete:

  • Gatekeeper requested (daos-gatekeeper added as a reviewer).

@soumagne
soumagne requested review from a team October 21, 2026 16:01
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soumagne requested a review from a team as a code owner October 21, 2026 16:01
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Ticket title is '2.8.1: dfuse crash during DAOS-19632 testing over PR-19308'
Status is 'In Review'
https://daosio.atlassian.net/browse/DAOS-19784

@soumagne
soumagne changed the base branch from master to soumagne/providers_opt October 27, 2026 22:46
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soumagne requested review from a team as code owners October 27, 2026 22:46
@soumagne
soumagne added this pull request to stack #18980 October 27, 2026 22:46
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soumagne force-pushed the soumagne/ucx_ep_fix branch from 2610011 to 8b30195 Compare October 27, 2026 22:48
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soumagne removed request for a team October 27, 2026 22:48
@soumagne
soumagne removed request for a team October 27, 2026 22:48
@soumagne
soumagne force-pushed the soumagne/ucx_ep_fix branch from 8b30195 to 097e356 Compare October 28, 2026 22:26
In workloads such as dfuse, multiple threads accessing the same CART
context and issuing RPCs could have led to a race during EP update
(after a disconnect/reconnect event).

Signed-off-by: Jerome Soumagne <jerome.soumagne@hpe.com>
@soumagne
soumagne force-pushed the soumagne/ucx_ep_fix branch from 097e356 to 802c6f6 Compare October 29, 2026 16:43

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