Briefly, this error occurs when there is a mismatch between the type of Elasticsearch node specified and the host list set for that node. This could be due to incorrect configuration settings. To resolve this issue, you should verify your Elasticsearch configuration file (elasticsearch.yml) and ensure that the node type and host list match. If you’re using a cluster, make sure that the node types and host lists are correctly set for each node. Also, check for any syntax errors or typos in your configuration file.
This guide will help you check for common problems that cause the log ” host list for [” + key + “] is set but type is [” + type + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “host list for [” + key + “] is set but type is [” + type + “]” class name is HttpExporter.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
} else {
throw new SettingsException("host list for [" + key + "] is empty but type is [" + type + "]");
}
} else if ("http".equals(type) == false) {
// the hosts can only be non-empty if the type is "http"
throw new SettingsException("host list for [" + key + "] is set but type is [" + type + "]");
} boolean httpHostFound = false;
boolean httpsHostFound = false;
