core: fix false-positive orphan warning in ManagedChannelOrphanWrapper#12705
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themechbro wants to merge 4 commits intogrpc:masterfrom
Open
core: fix false-positive orphan warning in ManagedChannelOrphanWrapper#12705themechbro wants to merge 4 commits intogrpc:masterfrom
themechbro wants to merge 4 commits intogrpc:masterfrom
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Add a reachability fence in shutdown() and shutdownNow() to ensure the wrapper is not garbage collected while shutdown logic is executing. This prevents a race condition when using directExecutor() where a warning could be logged despite a proper shutdown. Fixes grpc#12641
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This PR addresses a race condition identified in #12641 where ManagedChannelOrphanWrapper could incorrectly log a "not shutdown properly" warning during garbage collection.
Changes:
Moved phantom.clearSafely() to execute after the super.shutdown() calls.
Added a reachability fence in shutdown() and shutdownNow() to ensure the wrapper remains alive until the methods return.
Added a regression test that simulates a reference being held on the stack to verify the fix.
Testing:
Verified with ./gradlew :grpc-core:test --tests ManagedChannelOrphanWrapperTest -PskipAndroid=true.