tasks is the sole authority on whether a ticket exists, but
pruneTerminalTickets dropped entries from it without telling
ReplyPushLoop. ticketCollected(ticket) was only ever called from
MessageService.poll's terminal branch, which pruneTerminalTickets
short-circuits past once a ticket is gone (poll returns null at the
top). A ticket the lead never polled — or one the reminder cap already
gave up on — was pruned from tasks but never collected in
ReplyPushLoop.pendingTickets, so it rode along on every later nudge to
the same lead forever, naming a ticket bridge_poll could no longer
find, and the map itself never shrank.
pruneTerminalTickets now calls pushLoop.ticketCollected for every
ticket it actually removes (guarded on pushLoop != null), so a pending
nudge entry lives exactly as long as its ticket is pollable. Reused
tasks as the only removal trigger rather than adding a second live
query back into MessageService — no new source of truth.
Added an injectable clock (LongSupplier nowNanos, defaulting to
System::nanoTime) to MessageService, mirroring the SessionManager/
SessionReaper nowNanos seam, so a test can cross the 10-minute
TICKET_TTL_NANOS deterministically instead of sleeping for real.
Confirmed the new regression test fails against the prior
pruneTerminalTickets (a stale ticket rides along on a later coalesced
nudge) before restoring the fix.
Dai Ha
6ebad2a91f