Loaded segment info – 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 load the segment information for a specific index. This could be due to a corrupted index, insufficient permissions, or a disk space issue. To resolve this, you can try to restore the index from a backup, check and adjust the permissions, or free up disk space. Additionally, you may need to check the OpenSearch logs for more detailed error messages that can provide further insight into the problem.

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This guide will help you check for common problems that cause the log ” {} loaded segment info [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index.

Log Context

Log “{} loaded segment info [{}]” classname is Store.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            ShardLock lock = shardLocker.lock(shardId; "open index"; TimeUnit.SECONDS.toMillis(5));
            Directory dir = new NIOFSDirectory(indexLocation)
        ) {
            SegmentInfos segInfo = Lucene.readSegmentInfos(dir);
            logger.trace("{} loaded segment info [{}]"; shardId; segInfo);

     * The returned IndexOutput validates the files checksum.


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