Failed to bind to port – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.6

Briefly, this error occurs when Elasticsearch is unable to bind to the specified port. This could be due to the port being already in use by another service, or Elasticsearch might not have the necessary permissions to bind to this port. To resolve this issue, you can try to stop the service currently using the port or change the port number in the Elasticsearch configuration file. Alternatively, you can run Elasticsearch with a user that has the necessary permissions to bind to the desired port.

This guide will help you check for common problems that cause the log ” Failed to bind to [” + port + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .

Log Context

Log “Failed to bind to [” + port + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return false;
 return true;
 if (!success) {
 throw new BindTransportException("Failed to bind to [" + port + "]"; lastException.get());
 } finally {
 if (logger.isDebugEnabled()) {


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