Unable to link C library native methods seatbelt will be disabled – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to link the C library, which results in the disabling of native methods (seatbelt). This could be due to incorrect library paths, missing dependencies, or incompatible library versions. To resolve this issue, you can try reinstalling the C library, ensuring that the library paths are correctly set, and that all necessary dependencies are installed. Also, make sure that the version of the C library is compatible with your version of OpenSearch.

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This guide will help you check for common problems that cause the log ” unable to link C library. native methods (seatbelt) will be disabled. ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: bootstrap.

Log Context

Log “unable to link C library. native methods (seatbelt) will be disabled.” classname is SystemCallFilter.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        MacLibrary lib = null;
        if (Constants.MAC_OS_X) {
            try {
                lib = (MacLibrary) Native.loadLibrary("c"; MacLibrary.class);
            } catch (UnsatisfiedLinkError e) {
                logger.warn("unable to link C library. native methods (seatbelt) will be disabled."; e);
        libc_mac = lib;


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