[oschulz]

Claude Opus 5.5 (Claude Code, effort xhigh), for Oliver.

Follow-up to #5: the problems that remained after its review and after runs on a multi-node EOS instance.

• An append during a read (docs/design.md, tests/integration/test_eos.cc). Where a file's replicas are on several storage nodes, the replica read may not show an append made during the read. This is the append failure from Eos tests non root #5, reproduced on a multi-node instance. The copy is then the listed version, and the next run copies the file again. The test allows that outcome only for a file whose replicas fileinfo puts on more than one host.
• Find limits as nobody. A caller that is nobody owns the directory that the test makes unreadable for nobody, so the test now skips for such a caller instead of failing. The comment and the docs now say which callers become nobody.
• TSan. A suppression for the report between XrdCl's own threads that fails the ubuntu-24.04 thread job now and then, most recently on 1779a9d before a rerun.

Tested

• Unit tests on ubuntu22 (none, thread); integration tests on ubuntu22 (none, thread) against the container instance.
• The find-limits test as root, as the sudoer and as nobody.
• The append test, 3 times on a multi-node instance: all passed in the new branch, including the retried copy and the part without checksums.
• Mutation: with the reader's post-read check disabled, the append test fails on the single-node container instance.
• The intermediate commit 4c44aaa: unit tests.
• Not tested locally: the suppression itself. The race never showed outside GitHub's ubuntu-24.04 runner, so only CI can confirm it.

Not in this PR. Deleting dev and taking it out of the CI triggers waits for your go-ahead. The on-demand job (long and EOS integration tests) can run now that main has the workflow. I'm starting it on this branch and will comment with the result.

🤖 Generated with Claude Code

https://claude.ai/code/session_01TRxwa5YUZtSYaNrtTTkhun

[oschulz]

Claude Opus 5.5 (Claude Code, effort xhigh).

The on-demand job ran for the first time, on this branch at 01e53db: run 41097365473. Both of its jobs passed. They covered the long tests (differential, crash consistency) and the integration tests against the container EOS instance and the xrootd server, without a sanitizer and under ASan/UBSan, including the sudoer's test. The PR's own CI passed on 01e53db as well.

416f100 only fixes a comment in tests/CMakeLists.txt, which lists what tsan.supp suppresses and lacked the new entry.