{"record":{"id":"6e56dc035f10cc65","repo":"apache/hadoop","slug":"missing-storageids-it-is-likely-that-the-hdfs-cli","errorCode":null,"errorMessage":"Missing storageIDs: It is likely that the HDFS client, who made this call, is running in an older version of Hadoop(pre-2.0.0-alpha)  which does not support storageIDs. datanodeID.length={datanodeID.length}","messagePattern":"Missing storageIDs: It is likely that the HDFS client, who made this call, is running in an older version of Hadoop\\(pre-2\\.0\\.0-alpha\\)  which does not support storageIDs\\. datanodeID\\.length=(.+?)","errorType":"exception","errorClass":"HadoopIllegalArgumentException","httpStatus":null,"severity":"error","filePath":"hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java","lineNumber":841,"sourceCode":"                                    + e.getLocalizedMessage());\n      throw e;\n    }\n    return node;\n  }\n\n  public DatanodeStorageInfo[] getDatanodeStorageInfos(\n      DatanodeID[] datanodeID, String[] storageIDs,\n      String format, Object... args) throws UnregisteredNodeException {\n    storageIDs = storageIDs == null ? new String[0] : storageIDs;\n    if (datanodeID.length != storageIDs.length) {\n      // Error for pre-2.0.0-alpha clients.\n      final String err = (storageIDs.length == 0?\n          \"Missing storageIDs: It is likely that the HDFS client,\"\n          + \" who made this call, is running in an older version of Hadoop\"\n          + \"(pre-2.0.0-alpha)  which does not support storageIDs.\"\n          : \"Length mismatched: storageIDs.length=\" + storageIDs.length + \" != \"\n          ) + \" datanodeID.length=\" + datanodeID.length;\n      throw new HadoopIllegalArgumentException(\n          err + \", \"+ String.format(format, args));\n    }\n    if (datanodeID.length == 0) {\n      return null;\n    }\n    final DatanodeStorageInfo[] storages = new DatanodeStorageInfo[datanodeID.length];\n    for(int i = 0; i < datanodeID.length; i++) {\n      if (datanodeID[i].equals(DatanodeID.EMPTY_DATANODE_ID)) {\n        storages[i] = null;\n        continue;\n      }\n      final DatanodeDescriptor dd = getDatanode(datanodeID[i]);\n      if (dd != null) {\n        storages[i] = dd.getStorageInfo(storageIDs[i]);\n      }\n    }\n    return storages;\n  }","sourceCodeStart":823,"sourceCodeEnd":859,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeManager.java#L823-L859","documentation":"Thrown as HadoopIllegalArgumentException from DatanodeManager.getDatanodeStorageInfos when the datanodeID array and storageIDs array lengths differ; the specific 'Missing storageIDs' text appears when storageIDs is empty, which indicates a pre-2.0.0-alpha client that does not understand per-storage identifiers. Callers pass paired (datanode, storageID) lists — e.g., pipeline recovery and block token renewal — and an empty/short storageIDs list cannot identify which storage to act on.","triggerScenarios":"An ancient client RPC (or code constructing these arrays without storageIDs) calls an API (e.g., updateBlockForPipeline/updatePipeline or DN-side getDatanodeStorageInfos usage) where datanodeID.length != storageIDs.length with storageIDs empty; length-mismatch variant also fires on partially built arrays.","commonSituations":"Mixing a pre-2.0 (0.20/1.x-era) client library with a modern cluster; custom tooling building DatanodeID[] but passing null/empty storageIDs; version-skew during rolling upgrades.","solutions":["Upgrade the client to a Hadoop 2.0.0-alpha+ (ideally cluster-matching) version so storageIDs are populated","In custom code, always pass a storageIDs array of equal length, obtained from LocatedBlock.getLocatedBlocks() storageIDs","If mid-upgrade, complete the rolling upgrade so all components speak the storage-aware protocol","Verify with the exception's suffix (format/args) which call path produced it and check that client's version"],"exampleFix":"// before: building targets without storage IDs\nDatanodeID[] dns = ...; String[] sids = null; // -> Missing storageIDs\n\n// after: derive storageIDs from the located block\nLocatedBlock lb = namenode.addBlock(src, clientName, previous, null, ...);\nDatanodeID[] dns = toDatanodeID(lb.getLocations());\nString[] sids = lb.getStorageIDs(); // same length as dns\nnamenode.updatePipeline(clientName, oldBlock, newBlock, dns, sids);","handlingStrategy":"validation","validationCode":"// Always pass equal-length arrays derived from a LocatedBlock\nDatanodeID[] dns = Arrays.stream(lb.getLocations()).map(DatanodeInfo::new).toArray(DatanodeID[]::new);\nString[] storageIDs = lb.getStorageIDs();\nassert dns.length == storageIDs.length && storageIDs.length > 0\n    : \"storageIDs missing — client/library too old or bad LocatedBlock\";\nnn.updatePipeline(clientName, oldBlock, newBlock, dns, storageIDs);","typeGuard":null,"tryCatchPattern":"try {\n  nn.updatePipeline(clientName, old, neu, dns, storageIDs);\n} catch (HadoopIllegalArgumentException e) {\n  if (e.getMessage().contains(\"storageIDs\")) {\n    // rebuild from a fresh LocatedBlock via addBlock; never mix old client arrays\n    LocatedBlock lb = nn.addBlock(src, clientName, neu, null, null, null);\n    nn.updatePipeline(clientName, old, lb.getBlock(), toIDs(lb), lb.getStorageIDs());\n  } else { throw e; }\n}","preventionTips":["Use a Hadoop 2.x+ client; retire 0.20/1.x-era libraries","Always source (datanodeID, storageID) pairs from LocatedBlock, never construct one side manually","During rolling upgrades, finish the upgrade before exercising pipeline-recovery RPCs","Add unit asserts on array-length equality in client wrappers"],"tags":["hdfs","storageid","client-version","pipeline","rpc","backward-compatibility"],"backgroundTag":"client-version-incompatibility","analyzedSha":"2add9630210752f88ceb1bb74eb65e37bf41da8e","analyzedAt":"2026-08-22T19:55:07.957Z","schemaVersion":2},"datasetVersion":"2026-08-22T20:17:22.307Z"}