[FLINK-15211] Web UI request url for watermark is too long in large parallelism

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 1.9.0, 1.9.1
• Component/s: Runtime / Web Frontend
• Assignee: Unassigned
• Reporter: fa zheng
• Created: 12/Dec/19 02:52
• Updated: 12/Dec/19 09:16
• Resolved: 12/Dec/19 05:50

Description

In large parallelism scenario, the request url to get watermark metric seems to too long  to get response.  The request url  is:

http://0.0.0.0:8081/jobs/:jobid/vertices/:vertexid/metrics?get=0.currentInputWatermark,......,1199.currentInputWatermark

The reason is :

org.apache.flink.shaded.netty4.io.netty.handler.codec.TooLongFrameException: An HTTP line is larger than 4096 bytes.

 

It needs to paginate requests and merge the results.