Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $

Add-ons Bindings
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1

Hello,

everytime I restart openHAB I get tons of these errors in openhab.log:

2020-08-10 01:58:31.945 [ERROR] [ansport.mqtt.internal.ClientCallback] - MQTT message received. MqttMessageSubscriber#processMessage() implementation failure
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:224) ~[?:?]
        at org.openhab.binding.mqtt.homeassistant.internal.ChannelConfigurationTypeAdapterFactory$1.read(ChannelConfigurationTypeAdapterFactory.java:77) ~[?:?]
        at com.google.gson.Gson.fromJson(Gson.java:888) ~[?:?]
        at com.google.gson.Gson.fromJson(Gson.java:853) ~[?:?]
        at com.google.gson.Gson.fromJson(Gson.java:802) ~[?:?]
        at com.google.gson.Gson.fromJson(Gson.java:774) ~[?:?]
        at org.openhab.binding.mqtt.homeassistant.internal.BaseChannelConfiguration.fromString(BaseChannelConfiguration.java:57) ~[?:?]
        at org.openhab.binding.mqtt.homeassistant.internal.BaseChannelConfiguration.fromString(BaseChannelConfiguration.java:68) ~[?:?]
        at org.openhab.binding.mqtt.homeassistant.internal.discovery.HomeAssistantDiscovery.receivedMessage(HomeAssistantDiscovery.java:151) ~[?:?]
        at org.openhab.binding.mqtt.discovery.TopicSubscribe.processMessage(TopicSubscribe.java:57) ~[?:?]
        at org.eclipse.smarthome.io.transport.mqtt.internal.ClientCallback.lambda$3(ClientCallback.java:96) ~[?:?]
        at java.util.ArrayList.forEach(ArrayList.java:1259) ~[?:1.8.0_262]
        at org.eclipse.smarthome.io.transport.mqtt.internal.ClientCallback.messageArrived(ClientCallback.java:96) ~[?:?]
        at org.eclipse.smarthome.io.transport.mqtt.internal.ClientCallback.messageArrived(ClientCallback.java:71) ~[?:?]
        at com.hivemq.client.internal.mqtt.mqtt3.Mqtt3AsyncClientView.lambda$callbackView$1(Mqtt3AsyncClientView.java:73) ~[bundleFile:?]
        at com.hivemq.client.internal.mqtt.MqttAsyncClient$CallbackSubscriber.onNext(MqttAsyncClient.java:227) [bundleFile:?]
        at com.hivemq.client.internal.mqtt.MqttAsyncClient$CallbackSubscriber.onNext(MqttAsyncClient.java:212) [bundleFile:?]
        at com.hivemq.client.rx.FlowableWithSingle$SingleFutureSubscriber.onNext(FlowableWithSingle.java:377) [bundleFile:?]
        at com.hivemq.client.internal.rx.operators.FlowableWithSingleCombine$SplitSubscriber$Default.tryOnNextActual(FlowableWithSingleCombine.java:206) [bundleFile:?]
        at com.hivemq.client.internal.rx.operators.FlowableWithSingleCombine$SplitSubscriber.tryOnNext(FlowableWithSingleCombine.java:171) [bundleFile:?]
        at io.reactivex.internal.operators.flowable.FlowableObserveOn$ObserveOnConditionalSubscriber.runAsync(FlowableObserveOn.java:649) [bundleFile:?]
        at io.reactivex.internal.operators.flowable.FlowableObserveOn$BaseObserveOnSubscriber.run(FlowableObserveOn.java:176) [bundleFile:?]
        at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:66) [bundleFile:?]
        at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57) [bundleFile:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_262]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_262]
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_262]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_262]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_262]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_262]
Caused by: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $
        at com.google.gson.stream.JsonReader.beginObject(JsonReader.java:385) ~[?:?]
        at org.openhab.binding.mqtt.generic.tools.JsonReaderDelegate.beginObject(JsonReaderDelegate.java:63) ~[?:?]
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:213) ~[?:?]
        ... 29 more

I only have MQTT 2.x installed so it must be this binding. After the errors in the log everything seems to run okay, also I do not see any more errors. It looks to me that this is caused maybe by the order components are loaded during startup?

I run openHAB 2.5.7 but I see these errors for months or longer now.

Is there anything I can do about it except ignoring it? :wink:

Cheers,
Roi