advise:set "is_train" of operator be "false" when its gradient parameter is null

[starimpact]

if we fix the parameters of an operator in the proceeding of training, (that means we do not learn the parameters), then its operator should be in an "is_train=false" mode. the "forward" should use the inference code in it.

[szha]

@apache/mxnet-committers: This issue has been inactive for the past 90 days. It has no label and needs triage.

For general "how-to" questions, our user forum (and Chinese version) is a good place to get help.

[indhub]

@starimpact Could you please add more information on why this is a problem and add small code to reproduce the problem? How did you freeze the parameter? Are you using the symbol or the imperative API?

[lanking520]

@starimpact any updates? Are you still facing this issue?

[ankkhedia]

@sandeep-krishnamurthy @nswamy @anirudh2290 Could you please close this issue due to lack of activity.

@starimpact Please feel free to re-open in case closed in error