1

INVALID_ARGUMENT_NUMBER

• Incorrect number of arguments provided for the given task-controller command
• Failure to initialize the job localizer

2

INVALID_USER_NAME

The user passed to the task-controller does not exist.

3

INVALID_COMMAND_PROVIDED

The task-controller does not recognize the command it was asked to execute.

4

SUPER_USER_NOT_ALLOWED_TO_RUN_TASKS

The user passed to the task-controller was the super user.

5

INVALID_TT_ROOT

The passed TaskTracker root does not match the configured TaskTracker root (mapred.local.dir), or does not exist.

6

SETUID_OPER_FAILED

Either could not read the local groups database, or could not set UID or GID

7

UNABLE_TO_EXECUTE_TASK_SCRIPT

The task-controller could not execute the task launcher script.

8

UNABLE_TO_KILL_TASK

The task-controller could not kill the task it was passed.

9

INVALID_TASK_PID

The PID passed to the task-controller was negative or 0.

10

ERROR_RESOLVING_FILE_PATH

The task-controller could not resolve the path of the task launcher script file.

11

RELATIVE_PATH_COMPONENTS_IN_FILE_PATH

The path to the task launcher script file contains relative components (for example, "..").

12

UNABLE_TO_STAT_FILE

The task-controller did not have permission to stat a file it needed to check the ownership of.

13

FILE_NOT_OWNED_BY_TASKTRACKER

A file which the task-controller must change the ownership of has the wrong the ownership.

14

PREPARE_ATTEMPT_DIRECTORIES_FAILED

The mapred.local.dir is not configured, could not be read by the task-controller, or could not have its ownership secured.

15

INITIALIZE_JOB_FAILED

The task-controller could not get, stat, or secure the job directory or job working working directory.

16

PREPARE_TASK_LOGS_FAILED

The task-controller could not find or could not change the ownership of the task log directory to the passed user.

17

INVALID_TT_LOG_DIR

The hadoop.log.dir is not configured.

18

OUT_OF_MEMORY

The task-controller could not determine the job directory path or the task launcher script path.

19

INITIALIZE_DISTCACHEFILE_FAILED

Could not get a unique value for, stat, or the local distributed cache directory.

20

INITIALIZE_USER_FAILED

Could not get, stat, or secure the per-user task tracker directory.

21

UNABLE_TO_BUILD_PATH

The task-controller could not concatenate two paths, most likely because it ran out of memory.

22

INVALID_TASKCONTROLLER_PERMISSIONS

The task-controller binary does not have the correct permissions set. See Information about Other Hadoop Security Programs.

23

PREPARE_JOB_LOGS_FAILED

The task-controller could not find or could not change the ownership of the job log directory to the passed user.

24

INVALID_CONFIG_FILE

The taskcontroller.cfg file is missing, malformed, or has incorrect permissions.

255

Unknown Error

Several possible causes for this error, including:

• User accounts on the cluster with an ID less than the value specified for the min.user.id property in the taskcontroller.cfg file. Default value of 1000 is good for Ubuntu but may not be valid for other OSs. To set the min.user.id in the taskcontroller.cfg file, see Step 7: Prepare the Cluster for Each User.
• Jobs do not run and the TaskTracker is unable to create a Hadoop logs directory (see Troubleshooting Error Messages).
• May result from previous errors. Check older entries in the log file for possibilities.