in impl/src/main/java/org/apache/rocketmq/remoting/internal/ByteUtils.java [246:260]
public static String toBinaryString(byte[] input) {
String result = "";
int i;
for (i = 0; i < input.length; i++) {
int e = input[i];
for (int ii = 0; ii < 8; ii++) {
int b = (e >>> ii) & 1;
result += b;
}
if (i != input.length - 1) {
result += " ";
}
}
return result;
}