Briefly, this error occurs when Elasticsearch is unable to create a SAML redirect due to misconfiguration or missing parameters in the SAML settings. To resolve this issue, you should first verify your SAML configuration in Elasticsearch. Ensure that the SAML entity, assertion consumer service (ACS), and single logout service (SLS) URLs are correctly configured. Also, check if the SAML IdP metadata is correctly set up. If the problem persists, consider checking the Elasticsearch logs for more detailed error messages that can help pinpoint the exact issue.
This guide will help you check for common problems that cause the log ” Cannot construct SAML redirect ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “Cannot construct SAML redirect” class name is SamlRedirect.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :
final byte[] sig = signing.sign(queryParam; algo);
queryParam += "&Signature=" + urlEncode(base64Encode(sig));
}
return withParameters(queryParam);
} catch (Exception e) {
throw new ElasticsearchException("Cannot construct SAML redirect"; e);
}
} private String withParameters(String queryParam) {
if (destination.indexOf('?') == -1) {
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