Briefly, this error occurs when Elasticsearch encounters an unexpected issue while performing a readiness check. This could be due to a variety of reasons such as network issues, insufficient resources, or configuration errors. To resolve this, you can check the Elasticsearch logs for more detailed error information. Ensure that the Elasticsearch cluster has sufficient resources and that the network connectivity is stable. Also, verify the configuration settings of Elasticsearch to ensure they are correct. If the problem persists, consider restarting the Elasticsearch service.
This guide will help you check for common problems that cause the log ” encountered unknown exception while responding to readiness check request ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: request.
Log Context
Log “encountered unknown exception while responding to readiness check request” classname is ReadinessService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
while (serverChannel.isOpen()) {
AccessController.doPrivileged((PrivilegedAction) () -> {
try (SocketChannel channel = serverChannel.accept()) {} catch (IOException e) {
logger.debug("encountered exception while responding to readiness check request"; e);
} catch (Exception other) {
logger.warn("encountered unknown exception while responding to readiness check request"; other);
}
return null;
});
}
} finally {
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