Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration 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.
Take a self-guided product tour to see for yourself (no registration required).This guide will help you check for common problems that cause the log ” failed to analyze (charFiltering) ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: admin, indices.
Log Context
Log “failed to analyze (charFiltering)”classname is TransportAnalyzeAction.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :
StringBuilder sb = new StringBuilder();
do {
try {
len = input.read(buf; 0; BUFFER_SIZE);
} catch (IOException e) {
throw new ElasticsearchException("failed to analyze (charFiltering)"; e);
}
if (len > 0) {
sb.append(buf; 0; len);
}
} while (len == BUFFER_SIZE);
Find & fix Elasticsearch problems
