Failed to process mapping updates – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.7-1.7

Briefly, this error occurs when Elasticsearch encounters issues while updating the mapping of an index. This could be due to a variety of reasons such as incorrect mapping syntax, incompatible data types, or insufficient cluster resources. To resolve this issue, you can check the mapping syntax for errors, ensure data types are compatible with the existing mapping, or increase the resources of your Elasticsearch cluster. Additionally, consider reducing the frequency of mapping updates if they are happening too often.

In addition we recommend you run the Elasticsearch Template Optimizer to fix problems in your data modeling.

It will analyze your templates to detect issues and improve search performance, reduce indexing bottlenecks and optimize storage utilization. The Template Optimizer is free and requires no installation.

Log Context

Log “failed to process mapping updates” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                } catch (Throwable t) {
                    if (t instanceof InterruptedException && !running) {
                        // all is well; we are shutting down
                    } else {
                        logger.warn("failed to process mapping updates"; t);
                    // cleanup all pending update callbacks that were not processed due to a global failure...
                    for (Iterator> iterator = pendingUpdates.entrySet().iterator(); iterator.hasNext(); ) {
                        Map.Entry entry =;


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