Dynatrace cluster upgrade failed - Elasticsearch

[sagar_dalvi]

In the current Dynatrace cluster upgrade, we are facing below error message due to which unable to upgrade Dynatrace cluster.

Error Message: Error: Elasticsearch status verification failed. Reason: Elasticsearch cluster is only partially functional. . Next attempt to upgrade will be performed in next maintenance time frame.

If any one faced the same, please assist me to resolve this problem

[Radoslaw_Szulgo · Accepted solution]

This happens when an Elasticsearch on one of nodes is down, or it was down and now data are being synchronized (replicated). Usually problem should be solved automatically. If not, please open a support ticket or reach out to Dynatrace ONE via help chat. 

[sagar_dalvi]

Yes, it is automatically resolved in a next scheduled upgrade.

[rudy_h]

How about if we can't start dynatrace cluster after failed upgrade? 

The active shards percent as number only reached 35%