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…ll task When an ongoing call finishes and `unregisterCall()` observes `ongoingCalls.isEmpty()`, it schedules a task on `scheduledExecutorService` to finish transport shutdown if the transport is in `TransportState.SHUTDOWN`. However, `unregisterCall()` runs without holding `synchronized (this)` and may have scheduled this task while the transport is still in `TransportState.READY`. If a new stream is created before the transport enters `TransportState.SHUTDOWN`, the previously scheduled task can execute after `shutdown()` and call `shutdownInternal(shutdownStatus, true)`, force-terminating the newly started call with `UNAVAILABLE: Channel shutdown invoked`. Pass `forceTerminate = false` to `shutdownInternal()` so it re-checks `ongoingCalls.isEmpty()` while holding `synchronized (this)`.
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When an ongoing call finishes and
unregisterCall()observesongoingCalls.isEmpty(), it schedules a task onscheduledExecutorServiceto finish transport shutdown if the transport is inTransportState.SHUTDOWN. However,unregisterCall()runs without holdingsynchronized (this)and may have scheduled this task while the transport is still inTransportState.READY. If a new stream is created before the transport entersTransportState.SHUTDOWN, the previously scheduled task can execute aftershutdown()and callshutdownInternal(shutdownStatus, true), force-terminating the newly started call withUNAVAILABLE: Channel shutdown invoked.Pass
forceTerminate = falsetoshutdownInternal()so it re-checksongoingCalls.isEmpty()while holdingsynchronized (this).