{"record":{"id":"bb7c9a23080f05d3","repo":"apache/hadoop","slug":"too-many-erased-not-recoverable","errorCode":null,"errorMessage":"Too many erased, not recoverable","messagePattern":"Too many erased, not recoverable","errorType":"exception","errorClass":"HadoopIllegalArgumentException","httpStatus":null,"severity":"error","filePath":"hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/DecodingState.java","lineNumber":51,"sourceCode":"   * checking assumes it's a MDS code. Other code  can override this.\n   * @param inputs input buffers to check\n   * @param erasedIndexes indexes of erased units in the inputs array\n   * @param outputs output buffers to check\n   */\n  <T> void checkParameters(T[] inputs, int[] erasedIndexes,\n                           T[] outputs) {\n    if (inputs.length != decoder.getNumParityUnits() +\n        decoder.getNumDataUnits()) {\n      throw new IllegalArgumentException(\"Invalid inputs length\");\n    }\n\n    if (erasedIndexes.length != outputs.length) {\n      throw new HadoopIllegalArgumentException(\n          \"erasedIndexes and outputs mismatch in length\");\n    }\n\n    if (erasedIndexes.length > decoder.getNumParityUnits()) {\n      throw new HadoopIllegalArgumentException(\n          \"Too many erased, not recoverable\");\n    }\n  }\n}\n","sourceCodeStart":33,"sourceCodeEnd":56,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/DecodingState.java#L33-L56","documentation":"Error \"Too many erased, not recoverable\" thrown in apache/hadoop.","triggerScenarios":"Thrown at hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/erasurecode/rawcoder/DecodingState.java:51 when the library encounters an invalid state.","commonSituations":"Occurs when more blocks are erased than parity units available, making recovery impossible. Check erasedIndexes.length <= numParityUnits before decoding.","solutions":["The number of erased blocks exceeds numParityUnits; the stripe is unrecoverable. Restore blocks from another replica or accept data loss.","Investigate why so many blocks are missing (disk failures, DN outages) before decoding."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"2add9630210752f88ceb1bb74eb65e37bf41da8e","analyzedAt":"2026-08-22T19:55:07.957Z","schemaVersion":2},"datasetVersion":"2026-08-22T20:17:22.307Z"}