Unexpected failure during %s current state n%s – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch encounters an unexpected issue while trying to save the current state of the cluster. This could be due to a variety of reasons such as network issues, disk space problems, or node failures. To resolve this issue, you can try the following: 1) Check the health of your cluster and ensure all nodes are functioning properly. 2) Verify that there is enough disk space available. 3) Check your network connectivity. 4) Review your Elasticsearch logs for more detailed error information.

This guide will help you check for common problems that cause the log ” unexpected failure during [%s]; current state:\n%s ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: routing, cluster.

Log Context

Log “unexpected failure during [%s]; current state:\n%s” classname is BatchedRerouteService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    final ClusterState state = clusterService.state();
                    if (MasterService.isPublishFailureException(e)) {
                        logger.debug(() -> format("unexpected failure during [%s]; current state:\n%s"; source; state); e);
                        // no big deal; the new master will reroute again
                    } else if (logger.isTraceEnabled()) {
                        logger.error(() -> format("unexpected failure during [%s]; current state:\n%s"; source; state); e);
                    } else {
                            () -> format("unexpected failure during [%s]; current state version [%s]"; source; state.version());


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?