For transform – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.4-7.5

Briefly, this error occurs when there’s an issue with the data transformation process in Elasticsearch. This could be due to incorrect configuration, insufficient resources, or a problem with the source data. To resolve this, you can check the transform configuration for errors, ensure that Elasticsearch has enough resources to perform the transformation, or verify the integrity of the source data. Additionally, check the Elasticsearch logs for more detailed error messages that can help pinpoint the exact issue.

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

Log Context

Log “{} for transform [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

    void reportSourceIndexChanges(final Set lastSourceIndexes; final Set newSourceIndexes) {
        // spam protection: only warn the first time
        if (newSourceIndexes.isEmpty() && lastSourceIndexes.isEmpty() == false) {
            String message = "Source did not resolve to any open indexes";
            logger.warn("{} for transform [{}]"; message; transformConfig.getId());
            transformAuditor.warning(transformConfig.getId(); message);
        } else {
            Set removedIndexes = Sets.difference(lastSourceIndexes; newSourceIndexes);
            Set addedIndexes = Sets.difference(newSourceIndexes; lastSourceIndexes);


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?