#20434
89%

Ran 06 Sep 2026 08:09PM UTC

Jobs 1

Files 687

Run time 1min

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Committed 04 Sep 2026 05:20AM UTC coverage: 89.211% (+0.009%) from 89.202%

Build # #20434

Build Type

push

github

Committed by

web-flow

Commit Message

core: Reset configSelector on realChannel while entering IDLE state (#12832)

ManagedChannel will be stuck in IDLE state when xDS control plane
doesn't have a resource anymore.
The scenario is following:
1. Channel is open for a xds resource.
2. XdsNameResolver subscribes to the resource on xDS control plane. 
3. The resource is removed from xDS control plane for extended period of
time (unhealthy for more than the idle timeout on Channel)
4. Channel enters into TRANSIENT_FAILURE
5. The Idle timeout triggers and Channel shutdowns XdsNameResolver and
other resources. xDS watchers are removed.
6. The resource comes back online on xDS control plane.
7. A new GRPC call is executed targeting the channel.
8. The channel stays in IDLE state and reports:
"io.grpc.StatusRuntimeException: UNAVAILABLE: LDS resource xxxx does not
exist nodeID: yyyy" because realChannel.configSelector still points to
old state.

```    
public <ReqT, RespT> ClientCall<ReqT, RespT> newCall(
        MethodDescriptor<ReqT, RespT> method, CallOptions callOptions) {
      if (configSelector.get() != INITIAL_PENDING_SELECTOR) {
        return newClientCall(method, callOptions);
      }
...
```

Coverage Stats

38641 of 43314 relevant lines covered (89.21%)

0.89 hits per line

Coverage Regressions

Lines	Coverage	∆	File
50	93.41	0.13%	../core/src/main/java/io/grpc/internal/ManagedChannelImpl.java
3	92.94	-0.42%	../okhttp/src/main/java/io/grpc/okhttp/OkHttpClientTransport.java
2	88.32	-0.93%	../netty/src/main/java/io/grpc/netty/NettyServer.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
1	75.25	0.99%	../servlet/src/main/java/io/grpc/servlet/AsyncServletOutputStreamWriter.java

Jobs

ID	Job ID	Ran	Files	Coverage
1	#20434.1	06 Sep 2026 08:09PM UTC	687	89.21

grpc / grpc-java / #20434
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grpc / grpc-java / #20434 89%

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