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

Opster Team

August-23, Version: 7.6-8.9

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Briefly, this error occurs when Elasticsearch fails to write a certificate to a ZIP file due to insufficient permissions, disk space issues, or a corrupted ZIP file. To resolve this, ensure that Elasticsearch has the necessary permissions to write to the ZIP file. Check if there’s enough disk space available. If the ZIP file is corrupted, create a new one. Also, ensure that the file path is correct and accessible.

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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” class name 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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