Failed to initialize SSL KeyManagerFactory – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.4-7.17

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Briefly, this error occurs when Elasticsearch is unable to initialize the SSL KeyManagerFactory. This is typically due to incorrect or missing SSL configurations, such as the SSL key or certificate. To resolve this issue, you can check the SSL configuration in your Elasticsearch settings. Ensure that the paths to the SSL key and certificate are correct and that the files are accessible. Also, verify that the password for the SSL key is correct. If you’re using a self-signed certificate, make sure it’s properly generated and trusted by your Elasticsearch server.

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This guide will help you check for common problems that cause the log ” failed to initialize SSL KeyManagerFactory ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “failed to initialize SSL KeyManagerFactory” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 Certificate[] certificateChain = getCertificateChain(environment);  return CertParsingUtils.keyManager(certificateChain; privateKey; keyPassword.getChars());
 } catch (IOException | UnrecoverableKeyException | NoSuchAlgorithmException | CertificateException | KeyStoreException e) {
 throw new ElasticsearchException("failed to initialize SSL KeyManagerFactory"; e);
 }  private Certificate[] getCertificateChain(@Nullable Environment environment) throws CertificateException; IOException {
 final Path certificate = CertParsingUtils.resolvePath(certPath; environment);


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