Open-Source

bitcoind can publish new blocks and transactions over ZMQ, and tools like LND depend on it. But if a configured ZMQ socket can’t bind at startup, bitcoind starts anyway and only logs it at debug level — so the problem surfaces days later, in someone else’s process. This is the bug, the 2019 history behind it, and the two-function design that fixes it.

Adding observability for query-settings fallback to MongoDB’s slow query log and profiler, and why the flag has to live on OpDebug rather than in AdditiveMetrics, which is replaced mid-operation.