Briefly, this error occurs when an invalid action name is used in an Elasticsearch API request. The action name is the specific operation you want to perform, and if it’s not recognized by Elasticsearch, it will throw this error. To resolve this issue, you should verify the action name in your request. Make sure it is spelled correctly and is a valid Elasticsearch action. Also, ensure that the version of Elasticsearch you are using supports the action you are trying to perform.
This guide will help you check for common problems that cause the log ” invalid action name [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: ping.
Log Context
Log “invalid action name [” classname is TransportService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
private void validateActionName(String actionName) {
// TODO we should makes this a hard validation and throw an exception but we need a good way to add backwards layer
// for it. Maybe start with a deprecation layer
if (isValidActionName(actionName) == false) {
logger.warn("invalid action name [" + actionName + "] must start with one of: " +
TransportService.VALID_ACTION_PREFIXES );
}
}
/**
