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

Opster Team

Aug-23, Version: 8.1-8.9

Briefly, this error occurs when a listener, which is a component that waits for certain events to occur, encounters a failure while trying to notify the system about a specific event in Elasticsearch. This could be due to a variety of reasons such as network issues, resource constraints, or bugs in the code. To resolve this issue, you can try the following: 1) Check the server logs for more detailed error messages. 2) Ensure that the system has sufficient resources (CPU, memory, disk space). 3) Check the network connectivity. 4) If the error persists, consider updating or debugging the code.

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

Log Context

Log “exception thrown by listener notifying of failure” classname is MasterService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            try (ThreadContext.StoredContext ignored = threadContextSupplier.get()) {
            } catch (Exception inner) {
                logger.error("exception thrown by listener notifying of failure"; inner);

        void notifyFailure() {
            assert failure != null;


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