Unexpected error during deletion of unallocated shard – 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 trying to delete an unallocated shard. This could be due to a variety of reasons such as insufficient permissions, disk space issues, or network connectivity problems. To resolve this, you can try to manually delete the shard if it’s not needed, check for sufficient disk space, ensure the Elasticsearch process has the necessary permissions, or troubleshoot network issues. Additionally, checking the Elasticsearch logs can provide more detailed information about the cause of the error.

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: shard, indices.

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)



How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?