Log actively being archived by another process

 Yesterday I saw my alert log for some issue. I found some information alert in my alert log file. I would like to share you.

Alert:
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ARC0: Evaluating archive log 2 thread 1 sequence 25821
ARC0: Unable to archive log 2 thread 1 sequence 25821
Log actively being archived by another process 
ARC1: Evaluating archive log 3 thread 1 sequence 25822
ARC1: Beginning to archive log 3 thread 1 sequence 25822

Why we getting this information alert?

Archiver process trying to archive a log (sequence# 25821) and its sees that another archiver process is already archiving the redo log files.

Is there any impact due to this alert?

There is no impact in database. This one is information alert. We can consider this one is noise alert & we can ignore it.