Failed to invoke after shard started callback – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-7.15

Briefly, this error occurs when Elasticsearch encounters an issue while executing the callback function after a shard has started. This could be due to a variety of reasons such as a network issue, a problem with the shard itself, or a bug in the callback function. To resolve this issue, you can try restarting the Elasticsearch node, checking the health of the shard, or debugging the callback function to identify and fix any potential issues.

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

Log Context

Log “[{}] failed to invoke after shard started callback” classname is CompositeIndexEventListener.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

    public void afterIndexShardStarted(IndexShard indexShard) {
        for (IndexEventListener listener : listeners) {
            try {
                listener.afterIndexShardStarted(indexShard);
            } catch (Exception e) {
                logger.warn(() -> new ParameterizedMessage("[{}] failed to invoke after shard started callback";
                    indexShard.shardId().getId()); e);
                throw e;
            }
        }
    }

 

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