{"record":{"id":"c2b6410058ae4ebf","repo":"elastic/elasticsearch","slug":"gappolicy-must-not-be-null-name","errorCode":null,"errorMessage":"[gapPolicy] must not be null: [{name}]","messagePattern":"\\[gapPolicy\\] must not be null: \\[(.+?)\\]","errorType":"validation","errorClass":"IllegalArgumentException","httpStatus":null,"severity":"error","filePath":"modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/BucketSelectorPipelineAggregationBuilder.java","lineNumber":69,"sourceCode":"        super(in, NAME);\n        bucketsPathsMap = in.readMap(StreamInput::readString);\n        script = new Script(in);\n        gapPolicy = GapPolicy.readFrom(in);\n    }\n\n    @Override\n    protected void doWriteTo(StreamOutput out) throws IOException {\n        out.writeMap(bucketsPathsMap, StreamOutput::writeString);\n        script.writeTo(out);\n        gapPolicy.writeTo(out);\n    }\n\n    /**\n     * Sets the gap policy to use for this aggregation.\n     */\n    public BucketSelectorPipelineAggregationBuilder gapPolicy(GapPolicy gapPolicy) {\n        if (gapPolicy == null) {\n            throw new IllegalArgumentException(\"[gapPolicy] must not be null: [\" + name + \"]\");\n        }\n        this.gapPolicy = gapPolicy;\n        return this;\n    }\n\n    /**\n     * Gets the gap policy to use for this aggregation.\n     */\n    public GapPolicy gapPolicy() {\n        return gapPolicy;\n    }\n\n    @Override\n    protected PipelineAggregator createInternal(Map<String, Object> metadata) {\n        return new BucketSelectorPipelineAggregator(name, bucketsPathsMap, script, gapPolicy, metadata);\n    }\n\n    @Override","sourceCodeStart":51,"sourceCodeEnd":87,"githubUrl":"https://github.com/elastic/elasticsearch/blob/db6a809a667c081ca1dc7500389d26975573215f/modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/BucketSelectorPipelineAggregationBuilder.java#L51-L87","documentation":"Error \"[gapPolicy] must not be null: [{name}]\" thrown in elastic/elasticsearch.","triggerScenarios":"Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/BucketSelectorPipelineAggregationBuilder.java:69 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":"2026-08-12T12:31:55.035Z"}