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Briefly, this error occurs when Elasticsearch encounters an unexpected situation while processing a request and fails to handle the exception properly. This could be due to a variety of reasons such as incorrect query syntax, insufficient memory, or network issues. To resolve this, you can check the Elasticsearch logs for more detailed error information. Ensure your queries are correctly formatted and that your system has enough resources to handle the request. If it’s a network issue, check your network connections and settings. Also, consider upgrading Elasticsearch if you’re using an older version.
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This guide will help you check for common problems that cause the log ” failed to handle exception response [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: response.
Log Context
Log “failed to handle exception response [{}]” classname is InboundHandler.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
private static void doHandleException(final TransportResponseHandler> handler; TransportException transportException) {
try {
handler.handleException(transportException);
} catch (Exception e) {
transportException.addSuppressed(e);
logger.error(() -> new ParameterizedMessage("failed to handle exception response [{}]"; handler); transportException);
}
}
private StreamInput namedWriteableStream(StreamInput delegate) {
return new NamedWriteableAwareStreamInput(delegate; namedWriteableRegistry);
