Found dangled index on node . This index cannot be – 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 ” Found dangled index on node . This index cannot be ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: dangled, index, indices and node.

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 “Found dangled index [{}] on node [{}]. This index cannot be” classname is LocalAllocateDangledIndices.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                             // with the current version and upgrade it if needed.
                            upgradedIndexMetaData = metaDataIndexUpgradeService.upgradeIndexMetaData(indexMetaData;
                                minIndexCompatibilityVersion);
                        } catch (Exception ex) {
                            // upgrade failed - adding index as closed
                            logger.warn(() -> new ParameterizedMessage("found dangled index [{}] on node [{}]. This index cannot be " +
                                "upgraded to the latest version; adding as closed"; indexMetaData.getIndex(); request.fromNode); ex);
                            upgradedIndexMetaData = IndexMetaData.builder(indexMetaData).state(IndexMetaData.State.CLOSE)
                                .version(indexMetaData.getVersion() + 1).build();
                        }
                        metaData.put(upgradedIndexMetaData; false);




 

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