Failed to execute %s transform for %s – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.4-8.9

Briefly, this error occurs when Elasticsearch is unable to execute a transform operation due to issues like incorrect syntax, insufficient permissions, or system resource constraints. To resolve this, you can check the syntax of your transform operation to ensure it’s correct. If the syntax is correct, verify that the user executing the transform has the necessary permissions. Lastly, check your system resources to ensure there’s enough memory and disk space for the operation.

This guide will help you check for common problems that cause the log ” failed to execute [%s] transform for [%s] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “failed to execute [%s] transform for [%s]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

    public ChainTransform.Result execute(WatchExecutionContext ctx; Payload payload) {
        List results = new ArrayList();
        try {
            return doExecute(ctx; payload; results);
        } catch (Exception e) {
            logger.error(() -> org.elasticsearch.core.Strings.format("failed to execute [%s] transform for [%s]"; TYPE;; e);
            return new ChainTransform.Result(e; results);

    ChainTransform.Result doExecute(WatchExecutionContext ctx; Payload payload; List results) throws IOException {


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