How To Solve Issues Related to Log – Metadata state not restored; reason:

Get an Elasticsearch Check-Up


Check if your ES issues are caused from misconfigured settings
(Free 2 min process)

ES Check Up
Elasticsearch Error Guide In Page Navigation :

Troubleshooting Background – start here to get the full picture       
Related Issues – selected resources on related issues  
Log Context – usefull for experts
About Opster – offering a diffrent approach to troubleshoot Elasticsearch

Check My Elasticsearch 


Troubleshooting background

To troubleshoot Elasticsearch log “Metadata state not restored; reason: ” it’s important to know common problems related to Elasticsearch concepts: metadata. See below-detailed explanations complete with common problems, examples and useful tips.

Metadata in Elasticsearch

What it is

Metadata is information about the data. In Elasticsearch, each document has associated metadata such as _id and _index meta fields.

Examples
  • Routing meta field:
    • _routing, a routing value that places a document in a particular shard.
  • Other meta field
    • _meta, not used by Elasticsearch but can be used to store application-specific metadata.
PUT index_01
{
  "mappings": {
    "_meta": { 
      "class": "App01::User01",
      "version": "01"
    }
  }
}

  • Identity meta fields: 
    _id , the id of the document, for example querying based on _id field
PUT index01/_doc/1
{
  "text": "Document with ID 1"
}
 
PUT index01/_doc/2
{
  "text": "Document with ID 2"
}
 
GET index01/_search
{
  "query": {
    "terms": {
      "_id": [ "1", "2" ] 
    }
  }
}


To help troubleshoot related issues we have gathered selected Q&A from the community and issues from Github , please review the following for further information :

Elasticsearch failed to recover after crash
stackoverflow.com/questions/26667063/elasticsearch-failed-to-recover-after-crash

Number of Views : 4.53 K  Score on Stackoverflow : 5

No Cluster Health With 2 Nodes
discuss.elastic.co/t/no-cluster-health-with-2-nodes/66249

 


Log Context

Log ”Metadata state not restored; reason: “ classname is GatewayService.java
We have extracted the following from Elasticsearch source code to get an in-depth context :

         
Override
        public void onFailure(String message) {
            recovered.set(false);
            scheduledRecovery.set(false);
            // don't remove the block here; we don't want to allow anything in such a case
            logger.info("metadata state not restored; reason: {}"; message);
        }

    }

    // used for testing





About Opster

Incorporating deep knowledge and broad history of Elasticsearch issues. Opster’s solution identifies and predicts root causes of Elasticsearch problems, provides recommendations and can automatically perform various actions to manage, troubleshoot and prevent issues

We are constantly updating our analysis of Elasticsearch logs, errors, and exceptions. Sharing best practices and providing troubleshooting guides.

Learn more: Glossary | Blog| Troubleshooting guides | Error Repository

Need help with any Elasticsearch issue ? Contact Opster

Did this page help you?