Java 协议消息端组标签与预期标签不匹配
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Protocol message end-group tag did not match expected tag
提问by Mike Rylander
I keep getting the following stack trace and am not sure what it means.
我不断收到以下堆栈跟踪，但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)
- What does "Protocol message end-group tag did not match expected tag." mean?
- What is a "message end-group tag"?
- Is this documented somewhere?
- “协议消息端组标记与预期标记不匹配”是什么意思。意思？
- 什么是“消息端组标签”？
- 这是在某处记录的吗？
采纳答案by Marc Gravell
Groups in protobuf are written as a start/end numeric pair - kinda like how <foo>needs a </foo>, but in a different format. Essentially it is complaining that it found a </bar>instead (just: the xml is only a metaphor). The details are in the encoding specification, but the long and short is that one of:
protobuf 中的组写为开始/结束数字对 - 有点像 how<foo>需要 a </foo>，但格式不同。本质上，它抱怨它找到了一个</bar>（只是：xml 只是一个比喻）。详细信息在编码规范中，但长短是其中之一：
- the data is inherently corrupt (either by damage of by a faulty encoder), or
- the data is becoming corrupt while reading, or
- the data is fine and you gave a faulty decoder
- 数据本质上已损坏（由有故障的编码器损坏），或
- 读取时数据损坏，或
- 数据很好，你给了一个错误的解码器
If I had to guess, the data has been damaged in transit - because that is so frighteningly common
如果我不得不猜测，数据在传输过程中已损坏 - 因为这太常见了
