Unable to start data frame transform – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.2-7.4

Briefly, this error occurs when Elasticsearch is unable to initialize a data frame transform due to issues like insufficient permissions, incorrect configuration, or lack of resources. To resolve this, ensure the user has the necessary permissions to perform the operation. Check the data frame transform configuration for any errors and correct them. Also, ensure that your Elasticsearch cluster has enough resources (CPU, memory, disk space) to perform the operation. If the problem persists, consider upgrading your Elasticsearch cluster to a more powerful setup.

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

Log Context

Log “Unable to start data frame transform [” class name is TransportStartDataFrameTransformAction.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (existingTask.isAssigned() == false) {
 String assignmentExplanation = "unknown reason";
 if (existingTask.getAssignment() != null) {
 assignmentExplanation = existingTask.getAssignment().getExplanation();
 listener.onFailure(new ElasticsearchStatusException("Unable to start data frame transform [" +
 request.getId() + "] as it is not assigned to a node; explanation: " + assignmentExplanation;
 // If the task already exists and is assigned to a node; simply attempt to set it to start


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