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grpc / grpc-java / #20414
89%

Build:
DEFAULT BRANCH: master
Ran 20 Aug 2026 06:15AM UTC
Jobs 1
Files 688
Run time 1min
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20 Aug 2026 06:02AM UTC coverage: 89.192% (-0.008%) from 89.2%
#20414

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netty: Support never-indexed metadata keys (#12976)

Add NettyChannelBuilder.neverIndexMetadataKey() and
neverIndexMetadataKeys() so callers can mark selected outbound metadata
keys for HPACK's never-indexed literal representation.

High-cardinality metadata values provide little compression benefit and
can churn the server's dynamic HPACK table. Keeping them out of the
table avoids unnecessary insertion and eviction work while preserving
dynamic indexing for other headers.

Propagate an immutable set of normalized metadata names through the
client transport and use it in Netty's HPACK sensitivity detector. Add
unit and interoperability coverage.

Generated with AI using OpenAI Codex (GPT-5).

Co-authored-by: Codex <noreply@openai.com>

38580 of 43255 relevant lines covered (89.19%)

0.89 hits per line

Coverage Regressions

Lines Coverage ∆ File
68
59.59
1.98% ../netty/src/main/java/io/grpc/netty/NettyServerBuilder.java
50
79.22
0.94% ../netty/src/main/java/io/grpc/netty/NettyChannelBuilder.java
43
91.25
0.02% ../netty/src/main/java/io/grpc/netty/NettyServerHandler.java
30
93.51
0.07% ../netty/src/main/java/io/grpc/netty/NettyClientHandler.java
21
89.25
0.15% ../netty/src/main/java/io/grpc/netty/NettyServer.java
9
73.27
-8.91% ../servlet/src/main/java/io/grpc/servlet/AsyncServletOutputStreamWriter.java
8
94.87
0.07% ../netty/src/main/java/io/grpc/netty/NettyClientTransport.java
7
92.47
0.17% ../netty/src/main/java/io/grpc/netty/NettyServerTransport.java
1
93.21
-0.14% ../okhttp/src/main/java/io/grpc/okhttp/OkHttpClientTransport.java
1
93.83
-0.62% ../opentelemetry/src/main/java/io/grpc/opentelemetry/OpenTelemetryMetricSink.java
1
91.59
-0.47% ../xds/src/main/java/io/grpc/xds/client/ControlPlaneClient.java
Jobs
ID Job ID Ran Files Coverage
1 #20414.1 20 Aug 2026 06:15AM UTC 688
89.19
Source Files on build #20414
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Coverage ∆ File Lines Relevant Covered Missed Hits/Line
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