Unable to get a valid mac address; will use a dummy address – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Unable to get a valid mac address; will use a dummy address ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: Index and Memory.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Unable to get a valid mac address; will use a dummy address” classname is MacAddressProvider.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             logger.warn("Unable to get mac address; will use a dummy address"; t);
            // address will be set below
        }

        if (!isValidAddress(address)) {
            logger.warn("Unable to get a valid mac address; will use a dummy address");
            address = constructDummyMulticastAddress();
        }

        byte[] mungedBytes = new byte[6];
        SecureRandomHolder.INSTANCE.nextBytes(mungedBytes);




 

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