Research · Tag · Iota

Posts tagged iota.

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RESEARCH
2026-07-13

How unbounded HTTP/2 concurrent streams let one TCP connection OOM-kill an IOTA node's public gRPC server

An IOTA node's public gRPC server accepts an unbounded number of concurrent HTTP/2 streams on a single TCP connection, so one client multiplexing around 200 concurrent GetTransactions calls drives resident memory from a few hundred MB to multiple GB in about 10 seconds until the kernel OOM-killer terminates the node.

Simon Morley
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