Downloading segments from remote segment store – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.5-2.9

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Briefly, this error occurs when OpenSearch is trying to retrieve segments from a remote segment store and encounters issues. This could be due to network connectivity problems, incorrect configuration of the remote segment store, or the remote segment store being unavailable. To resolve this, you can check your network connection, verify the configuration of the remote segment store, or ensure the remote segment store is up and running. If the issue persists, you may need to check the logs for more detailed error messages.

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This guide will help you check for common problems that cause the log ” Downloading segments from remote segment store ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, shard.

Log Context

Log “Downloading segments from remote segment store” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

     * @throws IOException if exception occurs while reading segments from remote store
    public void syncSegmentsFromRemoteSegmentStore(boolean overrideLocal; boolean refreshLevelSegmentSync; boolean shouldCommit)
        throws IOException {
        assert indexSettings.isRemoteStoreEnabled();"Downloading segments from remote segment store");
        RemoteSegmentStoreDirectory remoteDirectory = getRemoteDirectory();
        // We need to call RemoteSegmentStoreDirectory.init() in order to get latest metadata of the files that
        // are uploaded to the remote segment store.
        RemoteSegmentMetadata remoteSegmentMetadata = remoteDirectory.init();


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