OnFreeScrollContext listener failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

Briefly, this error occurs when Elasticsearch fails to execute the OnFreeScrollContext listener, which is responsible for managing the scroll context during data retrieval. This could be due to a variety of reasons such as insufficient resources, network issues, or a bug in the Elasticsearch version. To resolve this issue, you can try increasing the system resources, checking the network connectivity, or upgrading Elasticsearch to the latest stable version. Additionally, ensure that the scroll context is correctly implemented and not overly complex, which could lead to execution failures.

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

Log Context

Log “onFreeScrollContext listener [{}] failed” classname is SearchOperationListener.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        public void onFreeScrollContext(ReaderContext readerContext) {
            for (SearchOperationListener listener : listeners) {
                try {
                } catch (Exception e) {
                    logger.warn(() -> new ParameterizedMessage("onFreeScrollContext listener [{}] failed"; listener); e);