pg-yang commented on issue #9883:
URL: https://github.com/apache/skywalking/issues/9883#issuecomment-1398226560
```java
final byte[] decode = Base64.getDecoder().decode(s);
final byte[] decode2 = Base64.getDecoder().decode(s2);
final ResourceMetrics resourceMetrics =
ResourceMetrics.parseFrom(Arrays.copyOfRange(decode, 5, decode.length));
final ResourceMetrics resourceMetrics2 =
ResourceMetrics.parseFrom(Arrays.copyOfRange(decode2, 5, decode2.length));
```
Hello, above code could work, but I don't know why. s and s2 encoded by
base64. As mentioned in
[OpenTelemetry 0.7.0
format](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-metric-streams-formats-opentelemetry.html):
Each data structure starts with a header with an UnsignedVarInt32 indicating
the record length in bytes.
`UnsignedVarInt32` is 4 bytes, right? But the code works correctly when I
skip 5 byte, skipping 4 byte will encounter an exception.
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