Unable to clear scroll id – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch fails to clear a scroll ID, which is used for scrolling through large sets of data. This could be due to an invalid scroll ID, a network issue, or a problem with the Elasticsearch cluster. To resolve this issue, you can try the following: 1) Verify the scroll ID is correct and still valid. 2) Check the network connection between your application and the Elasticsearch cluster. 3) Investigate the health of your Elasticsearch cluster, ensuring it’s not overloaded or experiencing other issues.

This guide will help you check for common problems that cause the log ” unable to clear scroll id [{}]: {} ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: delete, delete-by-query, deletebyquery, plugins and scroll.

Log Context

Log “unable to clear scroll id [{}]: {}” classname is TransportDeleteByQueryAction.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                             logger.trace("scroll id [{}] cleared"; scrollId);

                        public void onFailure(Throwable e) {
                            logger.warn("unable to clear scroll id [{}]: {}"; scrollId; e.getMessage());

                if (failure != null) {


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