Exception thrown by listener notifying of failure from – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1.2-2.9

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Briefly, this error occurs when a listener in OpenSearch encounters an issue while processing an event or action and throws an exception. This could be due to a variety of reasons such as incorrect configurations, network issues, or bugs in the code. To resolve this issue, you could: 1) Check the OpenSearch logs for more detailed error messages that could indicate the root cause. 2) Verify your configurations to ensure they are correct. 3) Check your network connections and settings. 4) If the error persists, consider debugging your code or updating OpenSearch to the latest version.

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This guide will help you check for common problems that cause the log ” exception thrown by listener notifying of failure from [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: cluster.

Log Context

Log “exception thrown by listener notifying of failure from [{}]” classname is ClusterApplierService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        public void onFailure(String source; Exception e) {
            try (ThreadContext.StoredContext ignore = context.get()) {
                listener.onFailure(source; e);
            } catch (Exception inner) {
                logger.error(new ParameterizedMessage("exception thrown by listener notifying of failure from [{}]"; source); inner);

        public void onSuccess(String source) {


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