{"record":{"id":"9338eae14ac18720","repo":"apache/hadoop","slug":"mapoutputfile-can-t-allocate-spill-output-file","errorCode":null,"errorMessage":"MapOutputFile can't allocate spill/output file","messagePattern":"MapOutputFile can't allocate spill/output file","errorType":"exception","errorClass":"IOException","httpStatus":null,"severity":"error","filePath":"hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/main/java/org/apache/hadoop/mapred/nativetask/handlers/NativeCollectorOnlyHandler.java","lineNumber":169,"sourceCode":"      p = output.getSpillFileForWrite(spillNumber++, -1);\n      \n    } else if (command.equals(GET_COMBINE_HANDLER)) {\n      if (null == combinerHandler) {\n        return null;\n      }\n      final ReadWriteBuffer result = new ReadWriteBuffer(8);\n      \n      result.writeLong(combinerHandler.getId());\n      return result;\n    } else {\n      throw new IOException(\"Illegal command: \" + command.toString());\n    }\n    if (p != null) {\n      final ReadWriteBuffer result = new ReadWriteBuffer();\n      result.writeString(p.toUri().getPath());\n      return result;\n    } else {\n      throw new IOException(\"MapOutputFile can't allocate spill/output file\");\n    }\n  }\n}\n","sourceCodeStart":151,"sourceCodeEnd":173,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/main/java/org/apache/hadoop/mapred/nativetask/handlers/NativeCollectorOnlyHandler.java#L151-L173","documentation":"Error \"MapOutputFile can't allocate spill/output file\" thrown in apache/hadoop.","triggerScenarios":"Thrown by NativeCollectorOnlyHandler when MapOutputFile cannot allocate a spill or output file on the local disk, typically due to exhausted mapred.local.dir space or permissions. Free space on the local dirs or fix their permissions.","commonSituations":"Local disks full; all mapred.local.dir entries unhealthy; permission problems on local dirs.","solutions":["Check mapreduce.cluster.local.dir / mapred.local.dir: the local disk must have free space and be writable so spill/output files can be allocated.","Increase available local disk space or add more healthy local directories for the task."],"exampleFix":"<property><name>mapreduce.cluster.local.dir</name><value>/data1/local,/data2/local</value></property>","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"}