Cannot run forecast internal error please check the logs – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.16-8.9

Briefly, this error occurs when there’s an issue with the machine learning feature of Elasticsearch while trying to forecast data. It could be due to insufficient resources, incorrect configurations, or internal bugs. To resolve this, you can check the Elasticsearch logs for more detailed error messages. You may need to adjust your configurations, allocate more resources to Elasticsearch, or update to the latest version to fix potential bugs. If the problem persists, consider reducing the complexity of your model or the forecast time span.

This guide will help you check for common problems that cause the log ” Cannot run forecast: internal error; please check the logs ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “Cannot run forecast: internal error; please check the logs” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 private void getForecastRequestStats(String jobId; String forecastId; ActionListener listener) {
 Consumer forecastRequestStatsHandler = forecastRequestStats -> {
 if (forecastRequestStats == null) {
 // paranoia case; it should not happen that we do not retrieve a result
 listener.onFailure(new ElasticsearchException("Cannot run forecast: internal error; please check the logs"));
 } else if (forecastRequestStats.getStatus() == ForecastRequestStats.ForecastRequestStatus.FAILED) {
 List messages = forecastRequestStats.getMessages();
 if (messages.size() > 0) {
 String message = messages.get(0);