{"record":{"id":"177b913e5d8b6913","repo":"apache/hadoop","slug":"failed-to-load-fsimage-file-see-error-s-above-fo","errorCode":null,"errorMessage":"Failed to load FSImage file, see error(s) above for more info.","messagePattern":"Failed to load FSImage file, see error\\(s\\) above for more info\\.","errorType":"exception","errorClass":"java.io.IOException","httpStatus":null,"severity":"critical","filePath":"hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java","lineNumber":756,"sourceCode":"    FSImageFile imageFile = null;\n    for (int i = 0; i < imageFiles.size(); i++) {\n      try {\n        imageFile = imageFiles.get(i);\n        loadFSImageFile(target, recovery, imageFile, startOpt);\n        break;\n      } catch (IllegalReservedPathException ie) {\n        throw new IOException(\"Failed to load image from \" + imageFile,\n            ie);\n      } catch (Exception e) {\n        LOG.error(\"Failed to load image from \" + imageFile, e);\n        target.clear();\n        imageFile = null;\n      }\n    }\n    // Failed to load any images, error out\n    if (imageFile == null) {\n      FSEditLog.closeAllStreams(editStreams);\n      throw new IOException(\"Failed to load FSImage file, see error(s) \" +\n          \"above for more info.\");\n    }\n    prog.endPhase(Phase.LOADING_FSIMAGE);\n    \n    if (!rollingRollback) {\n      prog.beginPhase(Phase.LOADING_EDITS);\n      long txnsAdvanced = loadEdits(editStreams, target, Long.MAX_VALUE,\n          startOpt, recovery);\n      prog.endPhase(Phase.LOADING_EDITS);\n      needToSave |= needsResaveBasedOnStaleCheckpoint(imageFile.getFile(),\n          txnsAdvanced);\n    } else {\n      // Trigger the rollback for rolling upgrade. Here lastAppliedTxId equals\n      // to the last txid in rollback fsimage.\n      rollingRollback(lastAppliedTxId + 1, imageFiles.get(0).getCheckpointTxId());\n      needToSave = false;\n    }\n    editLog.setNextTxId(lastAppliedTxId + 1);","sourceCodeStart":738,"sourceCodeEnd":774,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImage.java#L738-L774","documentation":"loadFSImageAll() exhausted every candidate fsimage without success — each failed attempt logged an ERROR (corruption, md5 mismatch, unreadable file, unsupported layout) and cleared the in-memory target — so the loop ends with no usable image and startup aborts with this summary. The actionable diagnostics are the per-file ERROR lines just above this exception; edit streams are closed before throwing.","triggerScenarios":"All fsimage_* files corrupt (disk fault, truncated copy, md5 mismatch); images written by a newer Hadoop layout being read by older binaries; current/ containing no fsimage at all.","commonSituations":"Disk corruption on the metadata volume; partial rsync/scp of metadata between hosts; manual image edits breaking the md5; version downgrade attempts.","solutions":["Read the ERROR lines above this exception — they identify each failed file and the reason.","Restore a good fsimage (plus its .md5 and edits) from the Standby NameNode, Secondary checkpoint, or backups into <name.dir>/current/.","If the md5 mismatch is from a known intentional modification, regenerate the sidecar deliberately: md5sum fsimage_N > fsimage_N.md5.","Only with no recoverable copy: 'hdfs namenode -format' — total metadata loss that orphans all block data."],"exampleFix":"# before\nhdfs --daemon start namenode\n# IOException: Failed to load FSImage file, see error(s) above for more info.\n\n# after: restore from Standby/checkpoint copy\nscp standby-nn:/dfs/nn/current/fsimage_* /dfs/nn/current/\nscp standby-nn:/dfs/nn/current/fsimage_*.md5 /dfs/nn/current/\nhdfs --daemon start namenode","handlingStrategy":"try-catch","validationCode":"File img = newestFsImage; // newest fsimage_* in current/\nMD5Hash stored = MD5FileUtils.readStoredMd5ForFile(img);\nif (!stored.equals(MD5FileUtils.computeMd5ForFile(img))) {\n  // quarantine this image before the NameNode ever tries it\n}","typeGuard":null,"tryCatchPattern":"try {\n  fsImage.loadFSImage(startOpt);\n} catch (IOException e) {\n  // fatal: collect the per-file ERROR causes from the log, then restore a known-good image from Standby/backup\n}","preventionTips":["Keep Standby NameNodes and scheduled checkpoints so a good image always exists elsewhere.","Verify md5 after copying metadata between hosts.","Avoid downgrades — older binaries cannot read newer image layouts."],"tags":["hdfs","namenode","fsimage","corruption","startup"],"backgroundTag":"fsimage-load-failed","analyzedSha":"2add9630210752f88ceb1bb74eb65e37bf41da8e","analyzedAt":"2026-08-22T19:55:07.957Z","schemaVersion":2},"datasetVersion":"2026-08-23T01:17:44.959Z"}