Hi,
I am building an application using Sitewhere in which the message exchange
between device and the server is done using Protocol Buffer format. The
server sends a command to the device after converting the message in this
format, but at the device end when the bytes array is converted to get the
command, following exception is thrown:
com.google.protobuf.InvalidProtocolBufferException: Protocol message
contained an invalid tag (zero).
at
com.google.protobuf.CodedInputStream.readTag(CodedInputStream.java:108)
at
com.sitewhere.android.generated.Android$AndroidSpecification$_Header.<init>(Android.java:212)
at
com.sitewhere.android.generated.Android$AndroidSpecification$_Header.<init>(Android.java:203)
at
com.sitewhere.android.generated.Android$AndroidSpecification$_Header$1.parsePartialFrom(Android.java:255)
at
com.sitewhere.android.generated.Android$AndroidSpecification$_Header$1.parsePartialFrom(Android.java:1)
at
com.google.protobuf.AbstractParser.parsePartialFrom(AbstractParser.java:200)
at
com.google.protobuf.AbstractParser.parsePartialDelimitedFrom(AbstractParser.java:241)
at
com.google.protobuf.AbstractParser.parseDelimitedFrom(AbstractParser.java:253)
at
com.google.protobuf.AbstractParser.parseDelimitedFrom(AbstractParser.java:259)
at
com.google.protobuf.AbstractParser.parseDelimitedFrom(AbstractParser.java:49)
at
com.sitewhere.android.generated.Android$AndroidSpecification$_Header.parseDelimitedFrom(Android.java:410)
at
com.sitewhere.android.example.SiteWhereExample.onReceivedCustomCommand(SiteWhereExample.java:273)
at
com.sitewhere.android.SiteWhereActivity$SiteWhereResponseProcessor.receivedCustomCommand(SiteWhereActivity.java:231)
at
com.sitewhere.android.mqtt.RegistrationManager.onCustomCommandReceived(RegistrationManager.java:112)
at
com.sitewhere.android.mqtt.DefaultMqttInteractionManager$MqttMessageProcessor.run(DefaultMqttInteractionManager.java:139)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:390)
at java.util.concurrent.FutureTask.run(FutureTask.java:234)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
I have no clue what is the meaning of "Protocol message contained an
invalid tag (zero)". Please help. The byte array received from the server
is:
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