Listener failed while handling triggered event – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

Briefly, this error occurs when Elasticsearch encounters an issue while processing an event triggered by a certain action in the system. This could be due to a variety of reasons such as a network issue, a problem with the cluster, or a bug in the code. To resolve this issue, you can try restarting the Elasticsearch service, checking the network connectivity, or inspecting the cluster health. If the problem persists, you may need to debug the code to identify and fix the bug causing the error.

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

Log Context

Log “listener failed while handling triggered event [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        for (final Listener listener : listeners) {
            try {
            } catch (final Exception e) {
                // do not allow exceptions to escape this method; we should continue to notify listeners and schedule the next run
                logger.warn(new ParameterizedMessage("listener failed while handling triggered event [{}]"; name); e);

    // for testing


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