Opster Team
Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.
To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.
This guide will help you check for common problems that cause the log ” Application Default Credentials are not supported out of the box. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cloud-aws, repository-gcs and storage.

Log Context
Log “Application Default Credentials are not supported out of the box.” classname is GoogleCloudStorageService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
} if (Strings.hasLength(clientSettings.getProjectId())) { storageOptionsBuilder.setProjectId(clientSettings.getProjectId()); } if (clientSettings.getCredential() == null) { logger.warn("\"Application Default Credentials\"" are not supported out of the box.""
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Lourens Rozema
CTO at Omnidots