Threw when attempting add to cache – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.13-8.2

Briefly, this error occurs when Elasticsearch tries to add data to its cache but fails. This could be due to insufficient memory, a corrupted cache, or a configuration issue. To resolve this, you can try clearing the cache, increasing the memory allocation for Elasticsearch, or checking the cache settings in your Elasticsearch configuration. If the issue persists, consider checking your data for corruption or inconsistencies.

This guide will help you check for common problems that cause the log ” [{}] threw when attempting add to cache ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: cache, plugin.

Log Context

Log “[{}] threw when attempting add to cache” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    // the feature usage will still be tracked.
                    if (License.OperationMode.BASIC.equals(trainedModelConfig.getLicenseLevel()) == false) {
                        ML_MODEL_INFERENCE_FEATURE.startTracking(licenseState; modelId);
                } catch (ExecutionException ee) {
                    logger.warn(() -> new ParameterizedMessage("[{}] threw when attempting add to cache"; modelId); ee);
            listeners = loadingListeners.remove(modelId);
            // if there are no listeners; we should just exit


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