Elasticsearch OpenSearch Version

By Opster Team

Updated: Aug 29, 2023

| 1 min read

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Overview

A version corresponds to the OpenSearch built-in tracking system that tracks the changes in each document’s update. When a document is indexed for the first time, it is assigned a version 1 using _version key. When the same document gets a subsequent update, the _version is incremented by 1 with every index, update or delete API call.

What it is used for

A version is used to handle the concurrency issues in OpenSearch which come into play during simultaneous accessing of an index by multiple users. OpenSearch handles this issue with an optimistic locking concept using the _version parameter to avoid letting multiple users edit the same document at the same time and protects users from generating incorrect data.

Notes

You cannot see the history of the document using _version. That means OpenSearch does not use _version to keep track of original changes that had been performed on the document. For example, if a document has been updated 10 times, it’s _version would be marked by OpenSearch as 11, but you cannot go back and see what version 5 of the document looked like. This has to be implemented independently.

Common problems

If optimistic locking is not implemented while making updates to a document, OpenSearch may return a conflict error with the 409 status code, which means that multiple users are trying to update the same version of the document at the same time.

POST /ratings/123?version=50
{
    "name": "Joker",
    "rating": 50
}

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Related log errors to this OS concept


No version match default to
Sleeping for after modifying repository because it contains snapshots older than version
Refreshed the DiscoveryNode version for node from to
Unexpected failure during current state version
Starting template upgrade to version templates will be updated and will be removed
Publishing cluster state with version failed for the following nodes
Error sending cluster state commit uuid version to
Cluster state with version that is published locally has neither been processed nor failed
Successfully loaded all snapshot s version information for from snapshot metadata

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