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

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to retrieve the specified document during the fetch phase of a search request. This could be due to a variety of reasons such as the document not existing, corruption in the index, or issues with the underlying storage. To resolve this issue, you can try re-indexing the data, checking the health of your storage system, or verifying the existence and accessibility of the document with the given docId.

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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 OpenSearch concepts: search.

Log Context

Log “Error running fetch phase for doc [” + docId + “]” class name is We extracted the following from OpenSearch 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 task with reason: " + context.getTask().getReasonCancelled());


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