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 ” Failed to process (ES v2.3) ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: tribe.

Log Context
Log “failed to process [{}]” classname is TribeService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
BasicClusterStateTaskConfig.create(Priority.NORMAL); executor; new AbstractClusterStateTaskListener() { Override public void onFailure(String source; Throwable t) { logger.warn("failed to process [{}]"; t; source); } }); } }