The BinSpec for the DescribeTopicPartitions Request has the client ID (compactString) as 0x00, 0x09. If I understand correctly, because compact string is a 32-bit unsignedVarInt, the leading byte, 0x00, should be omitted? Or does 32-bit mean that the smallest a varInt can be is 32-bit (2 bytes)? 0x…

Whoops. I had the type for client ID wrong. I thought it was a NULLABLE_COMPACT_STRING, but it’s a NULLABLE_STRING which is always 2 bytes

Hi @harveysanders , Client ID is a NULLABLE_STRING, instead of COMPACT_STRING. So its length N is specified by INT16 (2 bytes): 0x0009. apache/kafka/blob/f5d712396bdafeb24300d3cf7d206189a5ada4dc/clients/src/main/resources/common/message/RequestHeader.json#L39 { …

Question about vt6: List for an unknown topic

Challenges

system Closed December 1, 2024, 9:35pm 4

This topic was automatically closed 5 days after the last reply. New replies are no longer allowed.

Topic		Replies	Views
Kafka DescribeTopicPartitions request payload lacks bytes Challenges challenge:kafka	3	158	October 22, 2024
Cant seem to solve the problem Challenges challenge:kafka	3	119	March 2, 2025
Question about HN6 (Fetch with an unknown topic) Challenges challenge:kafka	11	232	October 4, 2024
#VT6 (Listing Partitions - List for an unknown topic) Challenges challenge:kafka	5	62	September 3, 2025
#vt6 - DescribeTopicPartitions - couple of comments Challenges challenge:kafka	3	124	October 31, 2024

Question about vt6: List for an unknown topic

Related topics