Briefly, this error occurs when Elasticsearch encounters an unexpected situation or condition that prevents it from completing a request. The error message “exception” is quite generic and could be caused by a variety of issues such as incorrect configurations, insufficient resources, or network problems. To resolve this, you could check the Elasticsearch logs for more detailed error messages, ensure that your configurations are correct, verify that your system has enough resources (like memory and disk space), and check your network connectivity.
This guide will help you check for common problems that cause the log ” exception ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .
Log Context
Log “exception” class name is ElasticsearchException.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
XContentParser.Token token = parser.currentToken();
ensureFieldName(parser; token; ERROR); token = parser.nextToken();
if (token.isValue()) {
return new ElasticsearchException(buildMessage("exception"; parser.text(); null));
} ensureExpectedToken(XContentParser.Token.START_OBJECT; token; parser);
token = parser.nextToken();
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