test: fix intermittent timeout in p2p_ibd_stalling.py #32148

1. 
   mzumsande commented at 5:32 pm on March 26, 2025: contributor

   After sending the headers message add a sync, so that we wait until the header message from the previous peer has been received before connecting additional peers. In the failed NetBSD run linked in #32090, the second node managed to complete the handshake and send its own headers message before the message from the first node was received.

   Fixes #32090

2. test: fix intermittent timeout in p2p_ibd_stalling.py

   by adding a sync, so that we wait until the header message from the
   previous peer has been received before connecting additional peers.

   9f35d4d070
3. 
   DrahtBot commented at 5:32 pm on March 26, 2025: contributor

   The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

   Code Coverage & Benchmarks

   For details see: https://corecheck.dev/bitcoin/bitcoin/pulls/32148.

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4. DrahtBot added the label Tests on Mar 26, 2025
5. 
   maflcko commented at 7:14 am on March 27, 2025: member

   lgtm ACK 9f35d4d070b2097259c0bfada391d8ef847e256e
6. maflcko added this to the milestone 29.0 on Mar 27, 2025
7. maflcko added the label Needs backport (29.x) on Mar 27, 2025
8. maflcko removed the label Needs backport (29.x) on Mar 27, 2025
9. maflcko removed this from the milestone 29.0 on Mar 27, 2025
10. 
    maflcko commented at 7:15 am on March 27, 2025: member

    (This is not a clean backport and should be rare enough to not matter, so can probably skip the backport here)
11. fanquake merged this on Mar 27, 2025
12. fanquake closed this on Mar 27, 2025

    ---

13. mzumsande deleted the branch on Mar 27, 2025

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mzumsande DrahtBot maflcko

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