{"record":{"id":"c9aa3a90dc189f43","repo":"apache/hadoop","slug":"eio-c9aa3a","errorCode":"EIO","errorMessage":"fuseConnectAsThreadUid: failed to open a libhdfs connection!  error %d.\n","messagePattern":"fuseConnectAsThreadUid: failed to open a libhdfs connection!  error (.+?)\\.\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/fuse-dfs/fuse_impls_getattr.c","lineNumber":39,"sourceCode":"#include \"fuse_stat_struct.h\"\n#include \"fuse_connect.h\"\n\nint dfs_getattr(const char *path, struct stat *st)\n{\n  struct hdfsConn *conn = NULL;\n  hdfsFS fs;\n  int ret;\n  hdfsFileInfo *info;\n\n  TRACE1(\"getattr\", path)\n  dfs_context *dfs = (dfs_context*)fuse_get_context()->private_data;\n  assert(dfs);\n  assert(path);\n  assert(st);\n\n  ret = fuseConnectAsThreadUid(&conn);\n  if (ret) {\n    fprintf(stderr, \"fuseConnectAsThreadUid: failed to open a libhdfs \"\n            \"connection!  error %d.\\n\", ret);\n    ret = -EIO;\n    goto cleanup;\n  }\n  fs = hdfsConnGetFs(conn);\n  \n  info = hdfsGetPathInfo(fs,path);\n  if (NULL == info) {\n    ret = -ENOENT;\n    goto cleanup;\n  }\n  fill_stat_structure(&info[0], st);\n\n  // setup hard link info - for a file it is 1 else num entries in a dir + 2 (for . and ..)\n  if (info[0].mKind == kObjectKindDirectory) {\n    int numEntries = 0;\n    hdfsFileInfo *info = hdfsListDirectory(fs,path,&numEntries);\n","sourceCodeStart":21,"sourceCodeEnd":57,"githubUrl":"https://github.com/apache/hadoop/blob/2add9630210752f88ceb1bb74eb65e37bf41da8e/hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/fuse-dfs/fuse_impls_getattr.c#L21-L57","documentation":"Error \"fuseConnectAsThreadUid: failed to open a libhdfs connection!  error %d.\n\" thrown in apache/hadoop.","triggerScenarios":"Thrown at hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/fuse-dfs/fuse_impls_getattr.c:39 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Verify the user's Kerberos ticket is valid (kinit) and that libhdfs can connect to the NameNode; then retry the getattr/stat operation.","Check the error code to distinguish authentication failure from configuration problems (CLASSPATH/HADOOP_CONF_DIR)."],"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"}