{"record":{"id":"31f598fd73cf4c08","repo":"elastic/elasticsearch","slug":"field-doesn-t-exist-31f598","errorCode":null,"errorMessage":"field [{}] doesn't exist","messagePattern":"field \\[(.+?)\\] doesn't exist","errorType":"exception","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"modules/ingest-common/src/main/java/org/elasticsearch/ingest/common/RenameProcessor.java","lineNumber":71,"sourceCode":"        return targetField;\n    }\n\n    boolean isIgnoreMissing() {\n        return ignoreMissing;\n    }\n\n    public boolean isOverrideEnabled() {\n        return overrideEnabled;\n    }\n\n    @Override\n    public IngestDocument execute(IngestDocument document) {\n        String path = document.renderTemplate(field);\n        if (path.isEmpty() || document.hasField(path, true) == false) {\n            if (ignoreMissing) {\n                return document;\n            } else {\n                throw new IllegalArgumentException(\"field [\" + path + \"] doesn't exist\");\n            }\n        }\n\n        // We fail here if the target field point to an array slot that is out of range.\n        // If we didn't do this then we would fail if we set the value in the target_field\n        // and then on failure processors would not see that value we tried to rename as we already\n        // removed it.\n        String target = document.renderTemplate(targetField);\n        if (document.hasField(target, true) && overrideEnabled == false) {\n            throw new IllegalArgumentException(\"field [\" + target + \"] already exists\");\n        }\n\n        Object value = document.getFieldValue(path, Object.class);\n        document.removeField(path);\n        try {\n            document.setFieldValue(target, value);\n        } catch (Exception e) {\n            // setting the value back to the original field shouldn't as we just fetched it from that field:","sourceCodeStart":53,"sourceCodeEnd":89,"githubUrl":"https://github.com/elastic/elasticsearch/blob/db6a809a667c081ca1dc7500389d26975573215f/modules/ingest-common/src/main/java/org/elasticsearch/ingest/common/RenameProcessor.java#L53-L89","documentation":"Thrown by RenameProcessor.execute when the source field to be renamed does not exist in the document and ignore_missing is false. The processor renders the field template, checks existence with deep inspection, and throws if the path resolves to nothing.","triggerScenarios":"Configuring a rename processor with a 'field' that resolves to an absent path (after template rendering), when ignore_missing is false or omitted.","commonSituations":"Renaming a field that is optional and sometimes absent in the source data. Field name typos. Template references like '{{field}}' that resolve to empty strings or missing paths.","solutions":["Set ignore_missing: true to tolerate absent source fields.","Correct the field path if it is misspelled.","Verify the rendered template value is non-empty and matches an existing field."],"exampleFix":"// before\n{\n  \"rename\": { \"field\": \"old_name\", \"target_field\": \"new_name\" }\n}\n// after\n{\n  \"rename\": { \"field\": \"old_name\", \"target_field\": \"new_name\", \"ignore_missing\": true }\n}","handlingStrategy":"validation","validationCode":"// Check field existence before rename (or set ignore_missing: true)\nString path = document.renderTemplate(\"{{old_name}}\");\nif (path.isEmpty() || document.hasField(path, true) == false) {\n    // skip; or configure ignore_missing: true on the processor\n}","typeGuard":"boolean fieldExists(IngestDocument doc, String field) {\n    String path = doc.renderTemplate(field);\n    return !path.isEmpty() && doc.hasField(path, true);\n}","tryCatchPattern":"try {\n    // run rename processor\n} catch (IllegalArgumentException e) {\n    if (e.getMessage().contains(\"doesn't exist\")) {\n        // optional field absent; set ignore_missing: true or skip\n    } else { throw e; }\n}","preventionTips":["Set ignore_missing: true for optional source fields.","Double-check field names for typos against the document schema.","Use the simulate API with sample documents to verify field paths."],"tags":["elasticsearch","ingest-pipeline","rename","validation"],"backgroundTag":null,"analyzedSha":"db6a809a667c081ca1dc7500389d26975573215f","analyzedAt":"2026-08-12T01:39:14.192Z","schemaVersion":2},"datasetVersion":"2026-08-12T13:17:24.610Z"}