OnNewContext listener listener failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when there’s a failure in the execution of a listener in Elasticsearch’s OnNewContext event. This could be due to a variety of reasons such as incorrect configuration, insufficient resources, or a bug in the listener’s code. To resolve this issue, you can try the following: 1) Check and correct the listener’s configuration, 2) Ensure that the Elasticsearch cluster has sufficient resources, 3) Debug the listener’s code to identify and fix any potential bugs, and 4) Update Elasticsearch to the latest version as the issue might have been fixed in a newer release.

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

Log Context

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

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