Unexpected failure when trying to verify river deleted – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 1.7-1.7

Briefly, this error occurs when Elasticsearch tries to verify the deletion of a river (a data feed mechanism) but encounters an unexpected issue. This could be due to a network problem, a bug in the software, or a misconfiguration. To resolve this, you can try restarting Elasticsearch, checking your network connections, or verifying the configuration of your rivers. If the problem persists, consider updating Elasticsearch to the latest version or removing and recreating the river.

This guide will help you check for common problems that cause the log ” unexpected failure when trying to verify river [{}] deleted ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “unexpected failure when trying to verify river [{}] deleted” classname is RiversService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    } catch (IndexMissingException e) {
                        // all is well; the _river index was deleted
                    } catch (Exception e) {
                        logger.warn("unexpected failure when trying to verify river [{}] deleted"; e; riverName.name());

            for (final RiverRouting routing : state.routing()) {