#20413
89%

Ran 20 Aug 2026 05:16AM UTC

Jobs 1

Files 688

Run time 1min

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Committed 20 Aug 2026 05:04AM UTC coverage: 89.2% (+0.006%) from 89.194%

Build # #20413

Build Type

push

github

Committed by

web-flow

Commit Message

xds: Prevent concurrent cancellations of data plane call in ExternalProcessorClientInterceptor (#12996)

If the ext-proc stream terminates with a non-OK status, the interceptor
cancels the downstream data plane call (on the executor thread).
Concurrently, the application thread may call cancel() on the returned
proxy call (e.g. for user cancellation or cleanup).

Since ClientCallImpl does not synchronize its cancelCalled field,
concurrent cancellations from these two threads resulted in a TSAN data
race (that was discussed in
https://github.com/grpc/grpc-java/pull/12975).

This commit introduces an AtomicBoolean downstreamCancelled in
DataPlaneClientCall to guard all downstream cancellations, ensuring that
only the first cancellation is forwarded to delayedCall/super.cancel().
This deduplicates and serializes cancellation handling from both the
application and the interceptor threads, preventing the data race.

Coverage Stats

38554 of 43222 relevant lines covered (89.2%)

0.89 hits per line

Coverage Regressions

Lines	Coverage	∆	File
20	96.14	0.02%	../xds/src/main/java/io/grpc/xds/ExternalProcessorClientInterceptor.java
5	83.02	-9.43%	../core/src/main/java/io/grpc/internal/Http2Ping.java
2	90.63	-0.35%	../core/src/main/java/io/grpc/internal/DelayedClientCall.java
1	87.36	-0.22%	../inprocess/src/main/java/io/grpc/inprocess/InProcessTransport.java
1	87.88	-3.03%	../netty/src/main/java/io/grpc/netty/ClientTransportLifecycleManager.java
1	87.6	-0.83%	../rls/src/main/java/io/grpc/rls/LinkedHashLruCache.java

Jobs

ID	Job ID	Ran	Files	Coverage
1	#20413.1	20 Aug 2026 05:16AM UTC	688	89.2

grpc / grpc-java / #20413
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