Incident-filer normaliser leaves hex letters of the RoutingGrain episode stamp unmasked, splitting one back-pressure condition into dozens of Critical incidents #5421

2026-09-22 22:59:20Z memex-portal-deployment-857546649-vf2q6 crit: MeshWeaver.Hosting.Orleans.RoutingGrain[0]
      [ROUTE] Routing back-pressure [6f268927#1 started 2026-09-22T22:59:20.9471251Z]: 64 route dispatches in flight (reporting threshold 64); ordered channels queued 44 over 6 stream destination(s), deepest per-channel queue 1, routing pool subscribing 0, waiting for a pool slot 5; oldest leg in flight 90 ms — stream-routed → cache/41czPxYhBke8Yz-MPeDDVQ (delivery Fut1XwvQ90yRL1aWHAFESA). Latest dispatch target cache/zIA-4kPmiEePY3qfW1foNA — the address that happened to cross the threshold, NOT a diagnosis. A slot is held from dispatch until the leg terminates, INCLUDING the unbounded wait for a ThreadPool thread before the leg's own timeouts start, so a CPU-starved silo raises this with nothing stuck. A CHANNEL is (destination, stream), so a deepest queue of 1 or more means legs of the SAME stream are blocked behind one another (head-of-line within one channel); 0 means nothing is waiting on anything, so read it as load. Many channels over FEW destinations is a multiplexer hub draining in parallel, which is load too — before issue #5009 those legs shared one channel and read as head-of-line. 🚨 THE TWO POOL GAUGES ANSWER DIFFERENT QUESTIONS AND ONLY ONE SEES THE WAIT NAMED ABOVE — issue #5018. 'subscribing' counts legs inside their SUBSCRIBE PROLOGUE only, so a leg still waiting for a ThreadPool thread and a leg already past its subscribe BOTH read 0 there; 'waiting for a pool slot' is the gauge that sees the pre-subscribe wait. High while subscribing is below the pool's cap is a THREAD shortage; both near zero means the legs are past their subscribe and the wait is downstream I/O. 🚨 READ THE OLDEST LEG FIRST: it is the only load-vs-leak discriminator available from a SINGLE line — every leg young is load the silo is absorbing, one leg minutes old is a slot that never came back and the label names it — whereas the episode stamp below needs a SECOND line to say anything. 🚨 Deepest is sampled AT THE CROSSING, so lik…[truncated]
2026-09-22 22:59:22Z memex-portal-deployment-857546649-vf2q6 crit: MeshWeaver.Hosting.Orleans.RoutingGrain[0]
      [ROUTE] Routing back-pressure [6f268927#2 started 2026-09-22T22:59:22.1454019Z]: 64 route dispatches in flight (reporting threshold 64); ordered channels queued 37 over 7 stream destination(s), deepest per-channel queue 2, routing pool subscribing 0, waiting for a pool slot 14; oldest leg in flight 1200 ms — stream-routed → cache/41czPxYhBke8Yz-MPeDDVQ (delivery j0uYOM7CRU6BvTlrW2VTSQ). Latest dispatch target cache/2v3dSLXHq0ekZ_MHIaE63g — the address that happened to cross the threshold, NOT a diagnosis. A slot is held from dispatch until the leg terminates, INCLUDING the unbounded wait for a ThreadPool thread before the leg's own timeouts start, so a CPU-starved silo raises this with nothing stuck. A CHANNEL is (destination, stream), so a deepest queue of 1 or more means legs of the SAME stream are blocked behind one another (head-of-line within one channel); 0 means nothing is waiting on anything, so read it as load. Many channels over FEW destinations is a multiplexer hub draining in parallel, which is load too — before issue #5009 those legs shared one channel and read as head-of-line. 🚨 THE TWO POOL GAUGES ANSWER DIFFERENT QUESTIONS AND ONLY ONE SEES THE WAIT NAMED ABOVE — issue #5018. 'subscribing' counts legs inside their SUBSCRIBE PROLOGUE only, so a leg still waiting for a ThreadPool thread and a leg already past its subscribe BOTH read 0 there; 'waiting for a pool slot' is the gauge that sees the pre-subscribe wait. High while subscribing is below the pool's cap is a THREAD shortage; both near zero means the legs are past their subscribe and the wait is downstream I/O. 🚨 READ THE OLDEST LEG FIRST: it is the only load-vs-leak discriminator available from a SINGLE line — every leg young is load the silo is absorbing, one leg minutes old is a slot that never came back and the label names it — whereas the episode stamp below needs a SECOND line to say anything. 🚨 Deepest is sampled AT THE CROSSING, so …[truncated]