Hypothesis: the [interop] / [batch] logs are missing because we're
hitting the SERIAL branch (parallel=false), not the parallel one —
which would explain perfectly the writer trace pattern:
- streamsView grows by 1 every 2-3 drains
- active stays at 6 or 7 (3 H3 init + at most 4 chunk streams)
- one stream per RTT cadence on the wire
That's exactly what client.get(authority, path) looks like in
sequence. parallel=true would call prepareRequests for chunks of 64.
Two new unconditional log lines (low-volume, control-flow only,
NOT in hot paths):
1. [boot] now includes TESTCASE and ROLE — to verify the runner
is sending TESTCASE=multiplexing as expected
2. [boot] transfer mode: parallel=BOOL urls=N — confirms which
branch we took
If parallel=false despite TESTCASE=multiplexing, the bug is in our
testcase-to-parallel mapping (line 192 of InteropClient.kt).
If parallel=true but [interop]/[batch] still missing, the bug is
elsewhere.
Claude
a9dc927cc6