Error running fetch phase for doc docId – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.1-8.5

Briefly, this error occurs when Elasticsearch fails to retrieve a specific document during the fetch phase of a query execution. This could be due to issues like incorrect document ID, corrupted index, or network problems. To resolve this, you can verify the document ID, check the health of your index using the “_cat/indices” API, or troubleshoot network connectivity. If the index is corrupted, consider reindexing your data.

This guide will help you check for common problems that cause the log ” Error running fetch phase for doc [” + docId + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search.

Log Context

Log “Error running fetch phase for doc [” + docId + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 for (FetchSubPhaseProcessor processor : processors) {
 hits[docs[index].index] = hit.hit();
 } catch (Exception e) {
 throw new FetchPhaseExecutionException(context.shardTarget(); "Error running fetch phase for doc [" + docId + "]"; e);
 if (context.isCancelled()) {
 throw new TaskCancelledException("cancelled");


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