Failed to notify response handler on shutdown action %s – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch tries to notify a response handler about a shutdown action but fails. This could be due to a network issue, a problem with the response handler itself, or a sudden shutdown of the Elasticsearch node. To resolve this issue, you can try restarting the Elasticsearch node, checking the network connection, or investigating the response handler for any potential issues. If the problem persists, you may need to look into the Elasticsearch logs for more detailed error information.

This guide will help you check for common problems that cause the log ” failed to notify response handler on shutdown; action: %s ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: response, handler.

Log Context

Log “failed to notify response handler on shutdown; action: %s” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                } catch (Exception e) {
                    assert false : e;
                    logger.warn(() -> format("failed to notify response handler on shutdown; action: %s"; holderToNotify.action()); e);


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