Cannot write incremental state – 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 write the incremental state due to issues like insufficient disk space, permission issues, or a network partition. To resolve this, you can free up disk space, check and correct file permissions, or ensure network connectivity. Additionally, check the OpenSearch logs for more specific error details. If the issue persists, consider restarting the OpenSearch node or cluster.

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This guide will help you check for common problems that cause the log ” cannot write incremental state ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “cannot write incremental state” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        private void ensureFullStateWritten() {
            assert fullStateWritten : "Need to write full state first before doing incremental writes";
            // noinspection ConstantConditions to catch this even if assertions are disabled
            if (fullStateWritten == false) {
                logger.error("cannot write incremental state");
                throw new IllegalStateException("cannot write incremental state");



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