{"record":{"id":"cf55ab2e9bec8805","repo":"elastic/elasticsearch","slug":"unexpected-token-token-in-pipelineaggregatorna","errorCode":null,"errorMessage":"Unexpected token {token} in [{pipelineAggregatorName}].","messagePattern":"Unexpected token (.+?) in \\[(.+?)\\]\\.","errorType":"validation","errorClass":"ParsingException","httpStatus":null,"severity":"error","filePath":"modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/DerivativePipelineAggregationBuilder.java","lineNumber":209,"sourceCode":"                        \"Unknown key for a \" + token + \" in [\" + pipelineAggregatorName + \"]: [\" + currentFieldName + \"].\"\n                    );\n                }\n            } else if (token == XContentParser.Token.START_ARRAY) {\n                if (BUCKETS_PATH_FIELD.match(currentFieldName, parser.getDeprecationHandler())) {\n                    List<String> paths = new ArrayList<>();\n                    while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {\n                        String path = parser.text();\n                        paths.add(path);\n                    }\n                    bucketsPaths = paths.toArray(new String[paths.size()]);\n                } else {\n                    throw new ParsingException(\n                        parser.getTokenLocation(),\n                        \"Unknown key for a \" + token + \" in [\" + pipelineAggregatorName + \"]: [\" + currentFieldName + \"].\"\n                    );\n                }\n            } else {\n                throw new ParsingException(\n                    parser.getTokenLocation(),\n                    \"Unexpected token \" + token + \" in [\" + pipelineAggregatorName + \"].\"\n                );\n            }\n        }\n\n        if (bucketsPaths == null) {\n            throw new ParsingException(\n                parser.getTokenLocation(),\n                \"Missing required field [\"\n                    + BUCKETS_PATH_FIELD.getPreferredName()\n                    + \"] for derivative aggregation [\"\n                    + pipelineAggregatorName\n                    + \"]\"\n            );\n        }\n\n        DerivativePipelineAggregationBuilder factory = new DerivativePipelineAggregationBuilder(pipelineAggregatorName, bucketsPaths[0]);","sourceCodeStart":191,"sourceCodeEnd":227,"githubUrl":"https://github.com/elastic/elasticsearch/blob/db6a809a667c081ca1dc7500389d26975573215f/modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/DerivativePipelineAggregationBuilder.java#L191-L227","documentation":"Error \"Unexpected token {token} in [{pipelineAggregatorName}].\" thrown in elastic/elasticsearch.","triggerScenarios":"Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/DerivativePipelineAggregationBuilder.java:209 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"db6a809a667c081ca1dc7500389d26975573215f","analyzedAt":"2026-08-12T01:39:14.192Z","schemaVersion":2},"datasetVersion":"2026-08-12T13:17:24.610Z"}