Missing or invalid written by writtenByStr – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when the ‘writtenByStr’ field in the OpenSearch document is either missing or contains invalid data. This field is crucial as it identifies the author of the document. To resolve this issue, ensure that the ‘writtenByStr’ field is present in your document and that it contains valid data. If the field is missing, add it. If it’s invalid, correct the data. Also, ensure that your document adheres to the OpenSearch specifications to prevent such errors.

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This guide will help you check for common problems that cause the log ” missing or invalid written_by [” + writtenByStr + “] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: index, blobstore.

Log Context

Log “missing or invalid written_by [” + writtenByStr + “]” class name is BlobStoreIndexShardSnapshot.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 } else if (physicalName == null || Strings.validFileName(physicalName) == false) {
 throw new OpenSearchParseException("missing or invalid physical file name [" + physicalName + "]");
 } else if (length < 0) {
 throw new OpenSearchParseException("missing or invalid file length");
 } else if (writtenBy == null) {
 throw new OpenSearchParseException("missing or invalid written_by [" + writtenByStr + "]");
 } else if (checksum == null) {
 throw new OpenSearchParseException("missing checksum for name [" + name + "]");
 return new FileInfo(name; new StoreFileMetadata(physicalName; length; checksum; writtenBy; metaHash); partSize);


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