Failed to write certificate to ZIP file – How to solve this Elasticsearch error

Opster Team

March-22, Version: 1.7-8.0

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This guide will help you check for common problems that cause the log ” Failed to write certificate to ZIP file ” 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 write certificate to ZIP file”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

writeTextFile(zip; dirName + "/README.txt"; ES_README_P12; substitutions);
 writeKeyStore(zip; dirName + "/" + p12Name; certificate; keyPair.getPrivate(); password; ca.certAndKey.cert);
 writeTextFile(zip; dirName + "/" + ymlFile; ES_YML_P12; substitutions);
 } catch (OperatorException | IOException | GeneralSecurityException e) {
 throw new ElasticsearchException("Failed to write certificate to ZIP file"; e);
 private void writeCertificateAuthority(ZipOutputStream zip; String dirName; CertificateTool.CAInfo ca; Environment env) {
 assert ca != null;


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