Viewing Kafka Messages¶
You can view the offset of different partitions, the message size, creation time, and body of messages in topics.
Procedure¶
Log in to the console.
Click
in the upper left corner to select a region.Note
Select the region where your Kafka instance is located.
Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
Click the desired Kafka instance to view its details.
In the left navigation pane, choose Message Query.
Set the query parameters by referring to Table 1.
Table 1 Message query parameters¶ Parameter
Description
Topic Name
Name of the topic to be queried.
Partition
Partition where the messages are located.
If no partition is specified, messages in all partitions of the topic are displayed in the query result.
Search By
The following methods are supported:
Creation time: Search by the time that messages are created.
Offset: Search by the message position.
Search For
This parameter is displayed only when Search By is set to Creation time.
Enter a keyword in the message body.
Note
Due to resource and performance restrictions, query with content is limited to 10 results. Each search covers at most 10,000 records, or 200 MB. For large records (> 20 KB per message) or a long period, dump messages for offline query.
Note
If a topic contains a large amount of data, an internal service error may be reported when you query messages in a topic with only one replica. You can shorten the time range for query based on the data volume.
Click Search to query messages.
Parameter description:
Topic Name: name of the topic where the message is located
Partition: partition where the message is located
Offset: position of the message in the partition
Message Size (Byte) size of the message
Created: time when the message is created. The message creation time is specified by CreateTime when a producer creates messages. If this parameter is not set during message creation, the message creation time is year 1970 by default.
Click View Message Body. In the displayed View Message Body dialog box, view the message content, including the topic name, partition, offset, creation time, and message body.
Note
The console displays messages smaller than 4 KB. To view messages larger than 4 KB, click Download Message.
(Optional) To restore the default settings, click Reset.