{"repo":"NousResearch/hermes-agent","public_id":"99349","display_label":"Fix segfault from unsynchronized SessionDB reads during close","summary":"These issues and PRs address a SIGSEGV/SystemError caused by lock-free SessionDB reads racing with Connection.close() inside pysqlite's statement cache. The proposed fixes involve serializing or routing reads to eliminate unsynchronized access on the shared writer connection.","subsystem":null,"counts":{"members":4,"open_issues":0,"open_issues_distinct":0,"open_prs":0,"closed_issues":1,"merged_prs":1,"attempt_prs":2},"landed_fix":{"status":"merged_to_main","basis":"structural","pr":99502,"merged_at":"2026-08-31T16:56:05+00:00"},"resolution":{"state":"resolved","by":"pr-99502"},"freshness":{"state":"verified","last_verified_at":"2026-08-31T16:56:05+00:00","is_stale":false},"grouping":{"backbone":"STRUCTURAL_SPANNING","link_density":0.5},"fix_edges":[{"issue_number":85079,"pr_number":99502,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-08-31T16:56:05+00:00"},{"issue_number":86516,"pr_number":99502,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-08-31T16:56:05+00:00"},{"issue_number":94258,"pr_number":99502,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-08-31T16:56:05+00:00"},{"issue_number":98332,"pr_number":99502,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-08-31T16:56:05+00:00"},{"issue_number":99349,"pr_number":99502,"tier":"verified","basis":"closing_ref","confidence":0.95,"recoverable_from_timeline":true,"pr_merged_at":"2026-08-31T16:56:05+00:00"}],"members":[{"kind":"issue","number":99349,"title":"SIGSEGV: lock-free SessionDB reads race Connection.close() inside pysqlite's statement cache","url":null,"state":"closed"},{"kind":"pr","number":99366,"title":"fix(sessions): serialize SessionDB reads during close","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#99502","number":99502}],"category":"implemented_elsewhere","implication":"superseded"},"merged":false},{"kind":"pr","number":99435,"title":"fix(state): route lock-free SessionDB reads through _read_ctx (segfault racing close())","url":null,"state":"closed","close_reason":{"refs":[{"kind":"pr","value":"#99349","number":99349},{"kind":"pr","value":"#82428","number":82428}],"category":"merged_via","implication":"superseded"},"merged":false},{"kind":"pr","number":99502,"title":"fix(state): eliminate unsynchronized reads on the shared SessionDB writer connection (SIGSEGV / SystemError class)","url":null,"state":"merged","close_reason":{"category":"merged"},"merged":true,"is_fix_pr":true,"fix_tier":"verified","files_changed":["hermes_state.py","hermes_state_search.py","tests/state/test_writer_conn_thread_safety.py","tests/test_hermes_state_conn_lock_audit.py","tests/test_session_db_read_path_split.py"]}],"trust":{"default_tier":"verified","includes_suggested":false}}