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Briefly, this error occurs when OpenSearch fails to alert its listeners about a particular event or change in the system. This could be due to a network issue, a bug in the system, or an overloaded server. To resolve this issue, you can try restarting the OpenSearch service, checking for any bugs in the system, or reducing the load on the server by optimizing your queries or increasing the server capacity. Additionally, ensure that your network connection is stable and reliable.
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This guide will help you check for common problems that cause the log ” Failed to notify listeners ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: listeners.
Log Context
Log “Failed to notify listeners” classname is SnapshotsService.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :
if (listeners != null) {
try {
ActionListener.onFailure(listeners; failure);
} catch (Exception ex) {
assert false : new AssertionError(ex);
logger.warn("Failed to notify listeners"; ex);
}
}
}
private static void completeListenersIgnoringException(@Nullable List> listeners; T result) {
