PreIndex listener failed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

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Briefly, this error occurs when a pre-index operation, such as validation or transformation, fails before the actual indexing process in Elasticsearch. This could be due to incorrect data format, insufficient permissions, or system resource issues. To resolve this, you can check the data being indexed for any inconsistencies or errors. Ensure that the user has the necessary permissions to perform the operation. Also, monitor the system resources to ensure there’s enough memory and disk space for Elasticsearch to operate efficiently.

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This guide will help you check for common problems that cause the log ” preIndex listener [{}] failed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, shard.

Log Context

Log “preIndex listener [{}] failed” classname is IndexingOperationListener.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            assert operation != null;
            for (IndexingOperationListener listener : listeners) {
                try {
                    listener.preIndex(shardId; operation);
                } catch (Exception e) {
                    logger.warn(() -> new ParameterizedMessage("preIndex listener [{}] failed"; listener); e);
                }
            }
            return operation;
        }

 

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