I used the deployment server to deploy new app. extract the new app to etc/shcluster/apps/ and then apply shclusterbundle.
This command says it might restart the search heads, but it doesn't. So I've manually restarted one search head, launched new app and noticed this error.
Problem solved after restarting the other search heads. Before restarting the Captain, it (and other heads in cluster) doesn't know the new app, hence this error message. But i found this error message in Indexers log (inspect search->indexer log file) misleading me to deploy the app to indexer cluster before restarting all search heads.
I am not sure why this error appeared in search logs from indexers.
PS: I've noticed this on the same day, but could not post an update, sorry for the delay and thanks for the help
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