Invalid URI – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.2-8.9

Briefly, this error occurs when the Uniform Resource Identifier (URI) provided in the Elasticsearch request is not correctly formatted or contains invalid characters. To resolve this issue, you should first verify the URI syntax. Ensure that it adheres to the standard format: scheme:[//[user:password@]host[:port]][/]path[?query][#fragment]. Also, check for any disallowed characters and replace them with their percent-encoded counterparts. If the URI includes any special characters, they should be URL encoded. Lastly, ensure that the URI does not exceed the maximum length of 2,083 characters.

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

Log Context

Log “Invalid URI:” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 final URI redirectUri;
 try {
 redirectUri = new URI(redirectUriString);
 } catch (URISyntaxException e) {
 // This should never happen as it's already validated in the settings
 throw new SettingsException("Invalid URI:" + RP_REDIRECT_URI.getKey(); e);
 final String postLogoutRedirectUriString = config.getSetting(RP_POST_LOGOUT_REDIRECT_URI);
 final URI postLogoutRedirectUri;
 try {
 postLogoutRedirectUri = new URI(postLogoutRedirectUriString);


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