Cannot generate error message for deserialization – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to deserialize a certain object or data. This could be due to incorrect data format, corrupted data, or issues with the serialization process. To resolve this issue, you can try the following: 1) Check the format of the data you’re trying to deserialize and ensure it matches the expected format. 2) Verify the integrity of the data. If it’s corrupted, you may need to restore it from a backup. 3) Review the serialization process for any potential issues or bugs.

This guide will help you check for common problems that cause the log ” cannot generate error message for deserialization ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: .

Log Context

Log “cannot generate error message for deserialization” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 builder.field("error"; "error building toString out of XContent: " + e.getMessage());
 builder.field("stack_trace"; ExceptionsHelper.stackTrace(e));
 return toString(builder);
 } catch (IOException e2) {
 throw new ElasticsearchException("cannot generate error message for deserialization"; e);
 }  private static XContentBuilder createBuilder(boolean pretty; boolean human) throws IOException {


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