Complex 1-Wire networks fail to operate as expected

[climategadgets]

Expected Behavior

All the sensors on all branches report status, all the switches respond to commands, shutdown is clean.

Actual Behavior

Operation is unstable, exceptions in the log (trace below), random phantom departures and arrivals are observed, the system gets stuck at shutdown.

Exception Trace

(observed at rev. ae3c96f)

2021-11-24 20:43:12,342 ERROR DriverCommand OneWireCommand-1 [execute] Error executing {OneWireCommandReadTemperatureAll messageId=6ba77d2e-ec11-4bd6-9207-dffda9879343}
 java.lang.NullPointerException: null
        at net.sf.dz3r.device.onewire.command.OneWireCommandReadTemperatureAll.execute(OneWireCommandReadTemperatureAll.java:92) ~[dz3r-owapi-3.6.8-SNAPSHOT.jar:?]
        at net.sf.dz3r.device.onewire.command.OneWireCommandReadTemperatureAll.execute(OneWireCommandReadTemperatureAll.java:55) ~[dz3r-owapi-3.6.8-SNAPSHOT.jar:?]
        at net.sf.dz3r.device.onewire.command.OneWireCommandReadTemperatureAll.execute(OneWireCommandReadTemperatureAll.java:28) ~[dz3r-owapi-3.6.8-SNAPSHOT.jar:?]
        at net.sf.dz3r.device.driver.command.DriverCommand.lambda$execute$0(DriverCommand.java:44) ~[dz3r-driver-3.6.8-SNAPSHOT.jar:?]
        at reactor.core.publisher.FluxCreate.subscribe(FluxCreate.java:94) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.Flux.subscribe(Flux.java:8468) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:426) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:488) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onNext(FluxPeekFuseable.java:210) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onNext(FluxOnAssembly.java:488) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxPublishOn$PublishOnSubscriber.runAsync(FluxPublishOn.java:440) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.publisher.FluxPublishOn$PublishOnSubscriber.run(FluxPublishOn.java:527) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84) [reactor-core-3.4.11.jar:3.4.11]
        at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37) [reactor-core-3.4.11.jar:3.4.11]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) [?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
        at java.lang.Thread.run(Thread.java:834) [?:?]