output http module: buffer variable does not take effect

[qinjunhang]

td-agent --version

td-agent 4.4.2 fluentd 1.15.3 (e89092c)

Hello, when I use the file module, the can get the variable, but I can’t get it in the http module, please help me

[daipom]

I don't know, but could it be due to the use of single quotations?

[qinjunhang]

I experimented and it has nothing to do with single quotes

[daipom]

Sorry, certainly it has nothing to do with that.

And I can confirm in_http can get the buffer key variable as out_file.
It is a common feature, so there is no difference between plugins.

If you can't, old buffer files may remain, or records that don't have the name field may flow in.