Unable to shutdown GCE Http Transport – 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 close the connection with Google Cloud Engine (GCE) due to issues with the HTTP transport. This could be due to network issues, incorrect configuration, or problems with GCE itself. To resolve this, you can try restarting the OpenSearch service, checking the network connection, or verifying the GCE configuration. If the problem persists, consider checking the OpenSearch logs for more detailed error information. It might also be beneficial to update or reinstall the GCE plugin if it’s outdated or corrupted.

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This guide will help you check for common problems that cause the log ” unable to shutdown GCE Http Transport ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: discovery-gce, plugins.

Log Context

Log “unable to shutdown GCE Http Transport” classname is GceMetadataService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

    protected void doStop() {
        if (gceHttpTransport != null) {
            try {
            } catch (IOException e) {
                logger.warn("unable to shutdown GCE Http Transport"; e);
            gceHttpTransport = null;


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