unexpected error during deletion of unallocated shard – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” unexpected error during deletion of unallocated shard ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: indices and shard.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “{} unexpected error during deletion of unallocated shard” classname is IndicesStore.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                         indicesService.deleteShardStore("no longer used"; shardId; currentState);
                    } catch (Exception ex) {
                        logger.debug(() -> new ParameterizedMessage("{} failed to delete unallocated shard; ignoring"; shardId); ex);
                    }
                };
                (source; e) -> logger.error(() -> new ParameterizedMessage("{} unexpected error during deletion of unallocated shard";
                    shardId); e)
            );
        }

    }




 

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