#20432
89%

Ran 01 Sep 2026 02:14PM UTC

Jobs 1

Files 687

Run time 2min

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Committed 01 Sep 2026 01:58PM UTC coverage: 89.218% (+0.008%) from 89.21%

Build # #20432

Build Type

push

github

Committed by

web-flow

Commit Message

fix(pick_first): ignore state updates from shut down or replaced subchannels (#12968)

In legacy PickFirstLoadBalancer, when handleNameResolutionError() or
shutdown() is called, subchannel.shutdown() is invoked. Because
ManagedChannelImpl delays subchannel shutdown by 5 seconds
(SUBCHANNEL_SHUTDOWN_DELAY_SECONDS), the old subchannel may complete a
connection attempt during this window and fire READY state updates.
Without a check verifying if the calling subchannel is still the current
active subchannel, PickFirstLoadBalancer publishes a READY picker for
the obsolete subchannel right before its 5-second delayed shutdown task
fires and kills the transport. This leaves the channel permanently stuck
in READY with a dead subchannel picker.

Partially addresses #12958

Coverage Stats

38642 of 43312 relevant lines covered (89.22%)

0.89 hits per line

Coverage Regressions

Lines	Coverage	∆	File
3	74.14	-2.59%	../servlet/src/main/java/io/grpc/servlet/ServletServerStream.java
1	98.82	0.04%	../core/src/main/java/io/grpc/internal/PickFirstLoadBalancer.java
1	87.88	-3.03%	../netty/src/main/java/io/grpc/netty/ClientTransportLifecycleManager.java
1	84.36	-0.41%	../netty/src/main/java/io/grpc/netty/Utils.java

Jobs

ID	Job ID	Ran	Files	Coverage
1	#20432.1	01 Sep 2026 02:14PM UTC	687	89.22

grpc / grpc-java / #20432
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grpc / grpc-java / #20432 89%

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