Log Failed to check index – How To Solve Related Issues

Log Failed to check index – How To Solve Related Issues

Updated: Feb-20

Elasticsearch Version: 1.7-8.0


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To troubleshoot log “Failed to check index” it’s important to understand a few problems related to Elasticsearch concepts index, shard. See bellow important tips and explanations on these concepts

Log Context

Log”failed to check index” classname is IndexShard.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                     logger.debug("check index [success]\n{}"; new String(os.bytes().toBytes(); Charsets.UTF_8));
            recoveryState.getStart().checkIndexTime(Math.max(0; TimeValue.nsecToMSec(System.nanoTime() - timeNS)));
        } catch (Exception e) {
            logger.warn("failed to check index"; e);

    public Engine engine() {
        Engine engine = engineUnsafe();

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 Github Issue Number 27731  

How To Identify Message Causing Err  


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