我一直在获取以下堆栈跟踪信息，并且不确定这意味着什么。

Caused by: com.google.protobuf.InvalidProtocolBufferException: Protocol message end-group tag did not match expected tag.
    at com.google.protobuf.InvalidProtocolBufferException.invalidEndTag(InvalidProtocolBufferException.java:73)
    at com.google.protobuf.CodedInputStream.checkLastTagWas(CodedInputStream.java:124)
    at com.google.protobuf.AbstractMessageLite$Builder.mergeFrom(AbstractMessageLite.java:189)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:732)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:238)
    at com.google.protobuf.AbstractMessageLite$Builder.mergeFrom(AbstractMessageLite.java:178)
    at com.google.protobuf.AbstractMessage$Builder.mergeFrom(AbstractMessage.java:724)

• “协议消息端组标签与预期标签不匹配”是什么？意思？
• 什么是“消息端组标签”？
• 这是在某处记录的吗？