回复: backpressure for just one subtask

[Chen Zhanghao <zh...@outlook.com>]

Hi Kenan,

You may check the stack trace and task-level flame graph [1] to investigate it.

[1] https://nightlies.apache.org/flink/flink-docs-release-1.17/docs/ops/debugging/flame_graphs/

Best,
Zhanghao Chen
________________________________
发件人: Kenan Kılıçtepe <kk...@gmail.com>
发送时间: 2023年9月26日 23:06
收件人: user <us...@flink.apache.org>
主题: backpressure for just one subtask

Hi,

I have a job running with parallelism=24.
I see that only one subtask is %100 busy and the others are %100 idle.
When I checked the received message counts, I saw that they are almost identical.
How can I figure out why this task causes backpressure and why only one subtask is %100 busy.

Thanks
Kenan