Its quite simple. Follow the steps to make worklog mandatory while changing issue status.
1. Create a screen with worklog field.
2. Add the same screen to each transition in workflow.
3. Add validator to make worklog mandatory.
I quite don't understand what's "log information", since if it's transition time, you can check it in issue's activity tab - transitions.
If it's some additional information, you need a custom field, a screen with this field and then map this screen onto a transition: https://confluence.atlassian.com/jirakb/mapping-a-screen-to-a-workflow-transition-720634253.html
You can also use some validator to make this field required on a transition.
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That's it!. And now every time someone transitions, he/she will have to compulsorily enter log time before moving ahead.
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