Failed to initialize TrustManager for – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch fails to initialize the TrustManager, which is responsible for managing the SSL certificates. This could be due to incorrect or missing SSL configurations, or issues with the certificate itself. To resolve this, ensure that the SSL configurations are correct and the certificate is valid. If the certificate is self-signed, make sure it’s properly imported into the Java keystore. Also, check the Elasticsearch logs for more detailed error messages that can help pinpoint the issue.

This guide will help you check for common problems that cause the log ” failed to initialize TrustManager for {} ” 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 TrustManager for {}” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 try {
 final X509ExtendedTrustManager delegateTrustManager = delegate.createTrustManager();
 final CertificateTrustRestrictions trustGroupConfig = readTrustGroup(groupConfigPath);
 return new RestrictedTrustManager(delegateTrustManager; trustGroupConfig; configuredX509Fields);
 } catch (IOException e) {
 throw new ElasticsearchException("failed to initialize TrustManager for {}"; e; toString());
 }  @Override
 public Collection getConfiguredCertificates() {