Failed send response for shard active while trying to delete shard – shard will probably not be removed – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 2.3-2.3

Briefly, this error occurs when Elasticsearch is unable to delete a shard because it is still active. This could be due to ongoing indexing or search operations. To resolve this issue, you can try the following: 1) Wait for the ongoing operations to complete before attempting to delete the shard again. 2) If the shard is not needed, you can manually force the deletion using the Elasticsearch APIs. 3) If the error persists, consider restarting the Elasticsearch node to clear any potential locks on the shard.

This guide will help you check for common problems that cause the log ” failed send response for shard active while trying to delete shard {} – shard will probably not be removed ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: delete, indices, response and shard.

Log Context

Log “failed send response for shard active while trying to delete shard {} – shard will probably not be removed” classname is IndicesStore.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                             try {
                                channel.sendResponse(new ShardActiveResponse(shardActive; clusterService.localNode()));
                            } catch (IOException e) {
                                logger.error("failed send response for shard active while trying to delete shard {} - shard will probably not be removed"; e; request.shardId);
                            } catch (EsRejectedExecutionException e) {
                                logger.error("failed send response for shard active while trying to delete shard {} - shard will probably not be removed"; e; request.shardId);
                            }
                        }
                    }; new ClusterStateObserver.ValidationPredicate() {
                        
Override
                        protected boolean validate(ClusterState newState) {



 

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