{"record":{"id":"e69431a53c4a88c8","repo":"apache/flink","slug":"could-not-read-page-in-col-as-the-dictionary-wa","errorCode":null,"errorMessage":"could not read page in col {} as the dictionary was missing for encoding {}","messagePattern":"could not read page in col (.+?) as the dictionary was missing for encoding (.+?)","errorType":"exception","errorClass":"IOException","httpStatus":null,"severity":"error","filePath":"flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/vector/reader/AbstractColumnReader.java","lineNumber":240,"sourceCode":"\n        int bitWidth = BytesUtils.getWidthFromMaxInt(descriptor.getMaxDefinitionLevel());\n        // do not read the length from the stream. v2 pages handle dividing the page bytes.\n        this.runLenDecoder = new RunLengthDecoder(bitWidth, false);\n        this.runLenDecoder.initFromStream(\n                this.pageValueCount, page.getDefinitionLevels().toInputStream());\n        try {\n            prepareNewPage(page.getDataEncoding(), page.getData().toInputStream());\n        } catch (IOException e) {\n            throw new IOException(\"could not read page \" + page + \" in col \" + descriptor, e);\n        }\n    }\n\n    private void prepareNewPage(Encoding dataEncoding, ByteBufferInputStream in)\n            throws IOException {\n        this.endOfPageValueCount = valuesRead + pageValueCount;\n        if (dataEncoding.usesDictionary()) {\n            if (dictionary == null) {\n                throw new IOException(\n                        \"could not read page in col \"\n                                + descriptor\n                                + \" as the dictionary was missing for encoding \"\n                                + dataEncoding);\n            }\n            @SuppressWarnings(\"deprecation\")\n            Encoding plainDict = Encoding.PLAIN_DICTIONARY; // var to allow warning suppression\n            if (dataEncoding != plainDict && dataEncoding != Encoding.RLE_DICTIONARY) {\n                throw new UnsupportedOperationException(\"Unsupported encoding: \" + dataEncoding);\n            }\n            this.dataInputStream = null;\n            this.dictionaryIdsDecoder = new RunLengthDecoder();\n            try {\n                this.dictionaryIdsDecoder.initFromStream(pageValueCount, in);\n            } catch (IOException e) {\n                throw new IOException(\"could not read dictionary in col \" + descriptor, e);\n            }\n            this.isCurrentPageDictionaryEncoded = true;","sourceCodeStart":222,"sourceCodeEnd":258,"githubUrl":"https://github.com/apache/flink/blob/2f3c205e9266cb30240eb7f4fdab15cad629a70f/flink-formats/flink-parquet/src/main/java/org/apache/flink/formats/parquet/vector/reader/AbstractColumnReader.java#L222-L258","documentation":"Error \"could not read page in col {} as the dictionary was missing for encoding {}\" thrown in apache/flink.","triggerScenarios":"Triggered at runtime when the operation fails because: could not read page in col the reported value as the dictionary was missing for encoding the reported value.","commonSituations":"Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: could not read page in col the reported value as the dictionary was missing for encoding the reported value.","solutions":["Address the cause reported by the error message: could not read page in col the reported value as the dictionary was missing for encoding the reported value","Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry."],"exampleFix":"Correct the condition described (\"could not read page in col the reported value as the dictionary was missing for encoding the reported value\") and rerun the job or command.","handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"2f3c205e9266cb30240eb7f4fdab15cad629a70f","analyzedAt":"2026-08-14T08:48:24.518Z","schemaVersion":2},"datasetVersion":"2026-08-14T10:17:34.591Z"}