forked from lei.chen/myxce
Rongsong Shen
75243fbb86
run-ha-soak.sh start_node previously sent each controller's stdout+stderr to /dev/null, hiding all crash output. Capture it per-node (logs/<node>.stderr). That immediately revealed the true 7.2 6-round blocker. Findings (research.md §"Task 7.2 on ~/tmp"): - On the user's non-overlay ~/tmp, a 2-round chaotic soak COMPLETES and 6-round rounds 1-3 each elect a higher-term primary — 5.2 + 5.3 hold live, job safety holds (zero committed-job loss; committed prefix byte-identical across members). - The 6-round stall is a RELEASE-BUILD SEGFAULT: a controller segfaults seconds after being restarted into the churning cluster (recovery->failover/PreVote), dropping the cluster to 1-of-3 so the survivor can't reach quorum. Captured stderr: "<pid> Segmentation fault (core dumped) ... --myname ctrl-3". - NOT consensus, NOT the in_catch_up deadlock (5.3 fixes that, unit-proven), NOT bug-924 (a separate fdatasync wedge hit one earlier run only). ASAN-invisible heisenbug; no gdb / no usable core in the sandbox, so the backtrace needs a debug+core+gdb env. Adds task 5.4 (root-cause+fix the chaotic-restart segfault) and bug-1281; re-attributes the 7.2 block from bug-924 to the segfault. Also notes the soak's divergence over-count (boundary 1+2*njobs vs primary committedLsn) as a separate Phase-1 accuracy fix. Consensus work (Phase-2/5.2/5.3) is unit-complete and live- confirmed for every round that completes. Co-Authored-By: Claude <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019dbTHR9CsEYK9RsqmQpQpC |
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