CODEWITHSUNDEEP
cadence-workflowtemporal-workflow
Anil Kumble
Anil Kumble

Reputation: 43

Can we say Activity is fault tolerant in cadence or Temporal

I have two workers named as w1 and w2

W1 hosts activity A1.

If w1 goes down, is it automatically created on w2 to handle server fail over?

I tried it but it says ActivityTimeOut error and workflow failed.

Don't we have any option to handle fail over like this?

In this case, activity is not timed out. It is not responding to cadence service in expected time due to worker crash. Is this right way to address it as ActivityTimeOut? Instead, can't we address it something like WorkerCrash?

Upvotes: 0

Views: 323

Answers (2)

Maxim Fateev
Maxim Fateev

Reputation: 6890

Cadence by default doesn't provide RetryOptions for an activity. So if it times out or fails the workflow will receive the failure and will fail if it is not handled. If you want for an activity to be retried you have to provide RetryOptions when invoking it.

Temporal by default provides RetryOption for any activity. So it is retried by default.

At this point, both Cadence and Temporal don't react to worker crashes directly. They rely on activity timeouts to detect any such failures. So specifying the correct StartToClose timeout is essential when invoking an activity.

Upvotes: 0

Long Quanzheng
Long Quanzheng

Reputation: 2401

Yes, but you need to set the correct timeout and retry options: see concepts docs

and Java client docs and Golang docs

Upvotes: 0

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