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Briefly, this error occurs when the SSL key provided in the Elasticsearch security realm is not in the correct format. This could be due to incorrect key generation or a mismatch in key and certificate. To resolve this, ensure that the SSL key is generated correctly and matches the certificate. Also, check the format of the key, it should be in PEM format. If the issue persists, consider regenerating the key and the certificate. Lastly, ensure that the key and certificate are correctly referenced in the Elasticsearch configuration.
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This guide will help you check for common problems that cause the log ” Skipping any SSL configuration from realm [{}{}] because the key [{}] is not in the correct format ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “Skipping any SSL configuration from realm [{}{}] because the key [{}] is not in the correct format” classname is SSLService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
final String prefix = "xpack.security.authc.realms.";
final Map settingsByRealmType = settings.getGroups(prefix);
settingsByRealmType.forEach((realmType; typeSettings) -> {
final Optional nonDottedSetting = typeSettings.keySet().stream().filter(k -> k.indexOf('.') == -1).findAny();
if (nonDottedSetting.isPresent()) {
logger.warn("Skipping any SSL configuration from realm [{}{}] because the key [{}] is not in the correct format";
prefix; realmType; nonDottedSetting.get());
} else {
typeSettings.getAsGroups().forEach((realmName; realmSettings) -> {
Settings realmSSLSettings = realmSettings.getByPrefix("ssl.");
// Put this even if empty; so that the name will be mapped to the global SSL configuration
