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java.lang.Objectorg.apache.hadoop.mapred.JobTracker
public class JobTracker
JobTracker is the central location for submitting and tracking MR jobs in a network environment.
| Nested Class Summary | |
|---|---|
static class |
JobTracker.IllegalStateException
A client tried to submit a job before the Job Tracker was ready. |
static class |
JobTracker.SafeModeAction
JobTracker SafeMode |
static class |
JobTracker.State
|
| Field Summary | |
|---|---|
static long |
COUNTER_UPDATE_INTERVAL
|
static long |
DEFAULT_DISK_HEALTH_CHECK_INTERVAL
How often TaskTracker needs to check the health of its disks, if not configured using mapred.disk.healthChecker.interval |
static long |
DELEGATION_KEY_UPDATE_INTERVAL_DEFAULT
|
static String |
DELEGATION_KEY_UPDATE_INTERVAL_KEY
|
static long |
DELEGATION_TOKEN_MAX_LIFETIME_DEFAULT
|
static String |
DELEGATION_TOKEN_MAX_LIFETIME_KEY
|
static long |
DELEGATION_TOKEN_RENEW_INTERVAL_DEFAULT
|
static String |
DELEGATION_TOKEN_RENEW_INTERVAL_KEY
|
static int |
FILE_NOT_FOUND
|
static String |
FOR_REDUCE_TASK
The reduce task number for which this map output is being transferred |
static String |
FROM_MAP_TASK
The map task from which the map output data is being transferred |
static int |
HEARTBEAT_INTERVAL_MIN
|
static String |
JT_KEYTAB_FILE
|
static String |
JT_USER_NAME
|
static org.apache.commons.logging.Log |
LOG
|
static String |
MAP_OUTPUT_LENGTH
The custom http header used for the map output length. |
static String |
MAPRED_CLUSTER_MAP_MEMORY_MB_PROPERTY
|
static String |
MAPRED_CLUSTER_MAX_MAP_MEMORY_MB_PROPERTY
|
static String |
MAPRED_CLUSTER_MAX_REDUCE_MEMORY_MB_PROPERTY
|
static String |
MAPRED_CLUSTER_REDUCE_MEMORY_MB_PROPERTY
|
static String |
MAX_USER_JOBCONF_SIZE_KEY
the config key for max user jobconf size |
static String |
RAW_MAP_OUTPUT_LENGTH
The custom http header used for the "raw" map output length. |
static int |
SUCCESS
|
static int |
TRACKERS_OK
|
static int |
UNKNOWN_TASKTRACKER
|
static long |
versionID
version 3 introduced to replace emitHearbeat/pollForNewTask/pollForTaskWithClosedJob with heartbeat(TaskTrackerStatus, boolean, boolean, boolean, short)
version 4 changed TaskReport for HADOOP-549. |
static long |
versionID
|
static String |
WORKDIR
|
| Fields inherited from interface org.apache.hadoop.security.RefreshUserMappingsProtocol |
|---|
versionID |
| Fields inherited from interface org.apache.hadoop.security.authorize.RefreshAuthorizationPolicyProtocol |
|---|
versionID |
| Fields inherited from interface org.apache.hadoop.mapred.AdminOperationsProtocol |
|---|
versionID |
| Method Summary | |
|---|---|
Collection<TaskTrackerStatus> |
activeTaskTrackers()
Get the active task tracker statuses in the cluster |
void |
addJobInProgressListener(org.apache.hadoop.mapred.JobInProgressListener listener)
Registers a JobInProgressListener for updates from this
TaskTrackerManager. |
Collection<TaskTrackerStatus> |
blacklistedTaskTrackers()
Get the statuses of the blacklisted task trackers in the cluster. |
void |
cancelDelegationToken(Token<DelegationTokenIdentifier> token)
Discard a current delegation token. |
Vector<JobInProgress> |
completedJobs()
|
Vector<JobInProgress> |
failedJobs()
|
void |
failJob(JobInProgress job)
Fail a job and inform the listeners. |
static InetSocketAddress |
getAddress(Configuration conf)
|
String |
getAliveNodesInfoJson()
|
JobStatus[] |
getAllJobs()
Get all the jobs submitted. |
String |
getAssignedTracker(TaskAttemptID taskId)
Get tracker name for a given task id. |
String |
getBlacklistedNodesInfoJson()
|
String |
getBuildVersion()
Returns the VersionInfo build version of the JobTracker |
TaskReport[] |
getCleanupTaskReports(JobID jobid)
Grab a bunch of info on the cleanup tasks that make up the job |
org.apache.hadoop.mapred.Clock |
getClock()
|
ClusterMetrics |
getClusterMetrics()
|
ClusterStatus |
getClusterStatus()
Deprecated. use getClusterStatus(boolean) |
ClusterStatus |
getClusterStatus(boolean detailed)
Get the current status of the cluster |
JobConf |
getConf()
Returns a handle to the JobTracker's Configuration |
String |
getConfigVersion()
|
Token<DelegationTokenIdentifier> |
getDelegationToken(Text renewer)
Get a new delegation token. |
DelegationTokenSecretManager |
getDelegationTokenSecretManager()
|
String |
getFilesystemName()
Grab the local fs name |
String |
getGraylistedNodesInfoJson()
|
String |
getHostname()
|
int |
getInfoPort()
|
JobInProgress |
getJob(JobID jobid)
Obtain the job object identified by jobid |
Counters |
getJobCounters(JobID jobid)
Grab the current job counters |
JobProfile |
getJobProfile(JobID jobid)
Grab a handle to a job that is already known to the JobTracker. |
JobStatus[] |
getJobsFromQueue(String queue)
Gets all the jobs submitted to the particular Queue |
JobStatus |
getJobStatus(JobID jobid)
Grab a handle to a job that is already known to the JobTracker. |
String |
getJobTrackerMachine()
|
static String |
getLocalJobFilePath(JobID jobId)
Get the localized job file path on the job trackers local file system |
TaskReport[] |
getMapTaskReports(JobID jobid)
Grab a bunch of info on the map tasks that make up the job |
JobID |
getNewJobId()
Allocates a new JobId string. |
int |
getNextHeartbeatInterval()
Calculates next heartbeat interval using cluster size. |
Node |
getNode(String name)
Return the Node in the network topology that corresponds to the hostname |
Collection<Node> |
getNodesAtMaxLevel()
Returns a collection of nodes at the max level |
int |
getNumberOfUniqueHosts()
|
int |
getNumResolvedTaskTrackers()
|
int |
getNumTaskCacheLevels()
|
static Node |
getParentNode(Node node,
int level)
|
long |
getProtocolVersion(String protocol,
long clientVersion)
Return protocol version corresponding to protocol interface. |
QueueAclsInfo[] |
getQueueAclsForCurrentUser()
Gets the Queue ACLs for current user |
AccessControlList |
getQueueAdmins(String queueName)
Get the administrators of the given job-queue. |
JobQueueInfo |
getQueueInfo(String queue)
Gets scheduling information associated with the particular Job queue |
String |
getQueueInfoJson()
|
org.apache.hadoop.mapred.QueueManager |
getQueueManager()
Return the QueueManager associated with the JobTracker. |
JobQueueInfo[] |
getQueues()
Gets set of Job Queues associated with the Job Tracker |
String |
getReasonsForBlacklisting(String host)
|
String |
getReasonsForGraylisting(String host)
|
long |
getRecoveryDuration()
How long the jobtracker took to recover from restart. |
TaskReport[] |
getReduceTaskReports(JobID jobid)
Grab a bunch of info on the reduce tasks that make up the job |
List<JobInProgress> |
getRunningJobs()
Version that is called from a timer thread, and therefore needs to be careful to synchronize. |
TaskReport[] |
getSetupTaskReports(JobID jobid)
Grab a bunch of info on the setup tasks that make up the job |
String |
getStagingAreaDir()
Get a hint from the JobTracker where job-specific files are to be placed. |
long |
getStartTime()
|
String |
getSummaryJson()
|
String |
getSystemDir()
Grab the jobtracker system directory path where job-specific files are to be placed. |
TaskCompletionEvent[] |
getTaskCompletionEvents(JobID jobid,
int fromEventId,
int maxEvents)
Get task completion events for the jobid, starting from fromEventId. |
String[] |
getTaskDiagnostics(TaskAttemptID taskId)
Get the diagnostics for a given task |
TaskTracker |
getTaskTracker(String trackerID)
|
TaskTrackerStatus |
getTaskTrackerStatus(String trackerID)
|
int |
getThreadCount()
|
org.apache.hadoop.mapred.TaskInProgress |
getTip(TaskID tipid)
Returns specified TaskInProgress, or null. |
int |
getTotalSubmissions()
|
String |
getTrackerIdentifier()
Get the unique identifier (ie. |
int |
getTrackerPort()
|
String |
getVersion()
|
String |
getVIVersion()
Returns the VersionInfo version of the JobTracker |
Collection<TaskTrackerStatus> |
graylistedTaskTrackers()
Get the statuses of the graylisted task trackers in the cluster. |
boolean |
hasRecovered()
Whether the JT has recovered upon restart |
boolean |
hasRestarted()
Whether the JT has restarted |
org.apache.hadoop.mapred.HeartbeatResponse |
heartbeat(TaskTrackerStatus status,
boolean restarted,
boolean initialContact,
boolean acceptNewTasks,
short responseId)
The periodic heartbeat mechanism between the TaskTracker and
the JobTracker. |
void |
initJob(JobInProgress job)
Initialize the Job |
boolean |
isBlacklisted(String trackerID)
Whether the tracker is blacklisted or not |
boolean |
isGraylisted(String trackerID)
Whether the tracker is graylisted or not |
boolean |
isInSafeMode()
Get safe mode. |
boolean |
isNodeGroupAware()
|
JobStatus[] |
jobsToComplete()
Get the jobs that are not completed and not failed |
void |
killJob(JobID jobid)
Kill the indicated job |
boolean |
killTask(TaskAttemptID taskid,
boolean shouldFail)
Kill indicated task attempt. |
static void |
main(String[] argv)
Start the JobTracker process. |
void |
offerService()
Run forever |
void |
refreshNodes()
Rereads the config to get hosts and exclude list file names. |
void |
refreshQueues()
Refresh the queue acls in use currently. |
void |
refreshServiceAcl()
Refresh the service-level authorization policy in-effect. |
void |
refreshSuperUserGroupsConfiguration()
Refresh superuser proxy group list |
void |
refreshUserToGroupsMappings()
Refresh user to group mappings. |
void |
removeJobInProgressListener(org.apache.hadoop.mapred.JobInProgressListener listener)
Unregisters a JobInProgressListener from this
TaskTrackerManager. |
long |
renewDelegationToken(Token<DelegationTokenIdentifier> token)
Renew a delegation token to extend its lifetime. |
void |
reportTaskTrackerError(String taskTracker,
String errorClass,
String errorMessage)
Report a problem to the job tracker. |
Node |
resolveAndAddToTopology(String name)
|
Vector<JobInProgress> |
runningJobs()
|
void |
setJobPriority(JobID jobid,
String priority)
Set the priority of the specified job |
boolean |
setSafeMode(JobTracker.SafeModeAction safeModeAction)
Set safe mode for the JobTracker. |
static JobTracker |
startTracker(JobConf conf)
Start the JobTracker with given configuration. |
static JobTracker |
startTracker(JobConf conf,
String identifier)
|
static JobTracker |
startTracker(JobConf conf,
String identifier,
boolean initialize)
|
void |
stopTracker()
|
JobStatus |
submitJob(JobID jobId,
String jobSubmitDir,
Credentials ts)
JobTracker.submitJob() kicks off a new job. |
List<List<String>> |
taskTrackerNames()
Get the active, blacklisted, and graylisted task tracker names in the cluster. |
Collection<TaskTrackerStatus> |
taskTrackers()
Get all the task trackers in the cluster |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
public static final String MAX_USER_JOBCONF_SIZE_KEY
public static final String DELEGATION_KEY_UPDATE_INTERVAL_KEY
public static final long DELEGATION_KEY_UPDATE_INTERVAL_DEFAULT
public static final String DELEGATION_TOKEN_RENEW_INTERVAL_KEY
public static final long DELEGATION_TOKEN_RENEW_INTERVAL_DEFAULT
public static final String DELEGATION_TOKEN_MAX_LIFETIME_KEY
public static final long DELEGATION_TOKEN_MAX_LIFETIME_DEFAULT
public static final org.apache.commons.logging.Log LOG
public static final String JT_USER_NAME
public static final String JT_KEYTAB_FILE
public static final String MAPRED_CLUSTER_MAP_MEMORY_MB_PROPERTY
public static final String MAPRED_CLUSTER_REDUCE_MEMORY_MB_PROPERTY
public static final String MAPRED_CLUSTER_MAX_MAP_MEMORY_MB_PROPERTY
public static final String MAPRED_CLUSTER_MAX_REDUCE_MEMORY_MB_PROPERTY
public static final int HEARTBEAT_INTERVAL_MIN
public static final long COUNTER_UPDATE_INTERVAL
public static final long DEFAULT_DISK_HEALTH_CHECK_INTERVAL
public static final int SUCCESS
public static final int FILE_NOT_FOUND
public static final String MAP_OUTPUT_LENGTH
public static final String RAW_MAP_OUTPUT_LENGTH
public static final String FROM_MAP_TASK
public static final String FOR_REDUCE_TASK
public static final String WORKDIR
public static final long versionID
heartbeat(TaskTrackerStatus, boolean, boolean, boolean, short)
version 4 changed TaskReport for HADOOP-549.
version 5 introduced that removes locateMapOutputs and instead uses
getTaskCompletionEvents to figure finished maps and fetch the outputs
version 6 adds maxTasks to TaskTrackerStatus for HADOOP-1245
version 7 replaces maxTasks by maxMapTasks and maxReduceTasks in
TaskTrackerStatus for HADOOP-1274
Version 8: HeartbeatResponse is added with the next heartbeat interval.
version 9 changes the counter representation for HADOOP-2248
version 10 changes the TaskStatus representation for HADOOP-2208
version 11 changes string to JobID in getTaskCompletionEvents().
version 12 changes the counters representation for HADOOP-1915
version 13 added call getBuildVersion() for HADOOP-236
Version 14: replaced getFilesystemName with getSystemDir for HADOOP-3135
Version 15: Changed format of Task and TaskStatus for HADOOP-153
Version 16: adds ResourceStatus to TaskTrackerStatus for HADOOP-3759
Version 17: Changed format of Task and TaskStatus for HADOOP-3150
Version 18: Changed status message due to changes in TaskStatus
Version 19: Changed heartbeat to piggyback JobTracker restart information
so that the TaskTracker can synchronize itself.
Version 20: Changed status message due to changes in TaskStatus
(HADOOP-4232)
Version 21: Changed information reported in TaskTrackerStatus'
ResourceStatus and the corresponding accessor methods
(HADOOP-4035)
Version 22: Replaced parameter 'initialContact' with 'restarted'
in heartbeat method (HADOOP-4305)
Version 23: Added parameter 'initialContact' again in heartbeat method
(HADOOP-4869)
Version 24: Changed format of Task and TaskStatus for HADOOP-4759
Version 25: JobIDs are passed in response to JobTracker restart
Version 26: Added numRequiredSlots to TaskStatus for MAPREDUCE-516
Version 27: Adding node health status to TaskStatus for MAPREDUCE-211
Version 28: Adding user name to the serialized Task for use by TT.
Version 29: Adding available memory and CPU usage information on TT to
TaskTrackerStatus for MAPREDUCE-1218
Version 30: Adding disk failure to TaskTrackerStatus for MAPREDUCE-3015
Version 31: Adding version methods for HADOOP-8209
public static final int TRACKERS_OK
public static final int UNKNOWN_TASKTRACKER
public static final long versionID
| Method Detail |
|---|
public org.apache.hadoop.mapred.Clock getClock()
public static JobTracker startTracker(JobConf conf)
throws IOException,
InterruptedException
zero.
conf - configuration for the JobTracker.
IOException
InterruptedException
public static JobTracker startTracker(JobConf conf,
String identifier)
throws IOException,
InterruptedException
IOException
InterruptedException
public static JobTracker startTracker(JobConf conf,
String identifier,
boolean initialize)
throws IOException,
InterruptedException
IOException
InterruptedException
public void stopTracker()
throws IOException
IOException
public long getProtocolVersion(String protocol,
long clientVersion)
throws IOException
VersionedProtocol
getProtocolVersion in interface VersionedProtocolprotocol - The classname of the protocol interfaceclientVersion - The version of the protocol that the client speaks
IOExceptionpublic DelegationTokenSecretManager getDelegationTokenSecretManager()
public boolean hasRestarted()
public boolean hasRecovered()
public long getRecoveryDuration()
public static InetSocketAddress getAddress(Configuration conf)
public void offerService()
throws InterruptedException,
IOException
InterruptedException
IOExceptionpublic int getTotalSubmissions()
public String getJobTrackerMachine()
public String getTrackerIdentifier()
public int getTrackerPort()
public int getInfoPort()
public long getStartTime()
public Vector<JobInProgress> runningJobs()
public List<JobInProgress> getRunningJobs()
public Vector<JobInProgress> failedJobs()
public Vector<JobInProgress> completedJobs()
public Collection<TaskTrackerStatus> taskTrackers()
Collection of TaskTrackerStatuspublic Collection<TaskTrackerStatus> activeTaskTrackers()
Collection of active TaskTrackerStatuspublic List<List<String>> taskTrackerNames()
public Collection<TaskTrackerStatus> blacklistedTaskTrackers()
Collection of blacklisted TaskTrackerStatuspublic Collection<TaskTrackerStatus> graylistedTaskTrackers()
Collection of graylisted TaskTrackerStatuspublic boolean isBlacklisted(String trackerID)
trackerID -
public boolean isGraylisted(String trackerID)
trackerID -
public TaskTrackerStatus getTaskTrackerStatus(String trackerID)
public TaskTracker getTaskTracker(String trackerID)
public Node resolveAndAddToTopology(String name)
throws UnknownHostException
UnknownHostExceptionpublic Collection<Node> getNodesAtMaxLevel()
public static Node getParentNode(Node node,
int level)
public Node getNode(String name)
public int getNumTaskCacheLevels()
public int getNumResolvedTaskTrackers()
public int getNumberOfUniqueHosts()
public boolean isNodeGroupAware()
public void addJobInProgressListener(org.apache.hadoop.mapred.JobInProgressListener listener)
JobInProgressListener for updates from this
TaskTrackerManager.
public void removeJobInProgressListener(org.apache.hadoop.mapred.JobInProgressListener listener)
JobInProgressListener from this
TaskTrackerManager.
public org.apache.hadoop.mapred.QueueManager getQueueManager()
QueueManager associated with the JobTracker.
QueueManager
public String getVIVersion()
throws IOException
IOException
public String getBuildVersion()
throws IOException
IOException
public org.apache.hadoop.mapred.HeartbeatResponse heartbeat(TaskTrackerStatus status,
boolean restarted,
boolean initialContact,
boolean acceptNewTasks,
short responseId)
throws IOException
TaskTracker and
the JobTracker.
The JobTracker processes the status information sent by the
TaskTracker and responds with instructions to start/stop
tasks or jobs, and also 'reset' instructions during contingencies.
status - the status updaterestarted - true if the process has just started or
restarted, false otherwiseinitialContact - true if this is first interaction since
'refresh', false otherwise.acceptNewTasks - true if the TaskTracker is
ready to accept new tasks to run.responseId - the last responseId successfully acted upon by the
TaskTracker.
HeartbeatResponse with
fresh instructions.
IOExceptionpublic int getNextHeartbeatInterval()
public String getFilesystemName()
throws IOException
IOExceptionpublic JobConf getConf()
public void reportTaskTrackerError(String taskTracker,
String errorClass,
String errorMessage)
throws IOException
taskTracker - the name of the task trackererrorClass - the kind of error (eg. the class that was thrown)errorMessage - the human readable error message
IOException - if there was a problem in communication or on the
remote side
public JobID getNewJobId()
throws IOException
IOException
public JobStatus submitJob(JobID jobId,
String jobSubmitDir,
Credentials ts)
throws IOException
IOException
public String getStagingAreaDir()
throws IOException
IOExceptionJobSubmissionProtocol.getStagingAreaDir()@Deprecated public ClusterStatus getClusterStatus()
getClusterStatus(boolean)
public ClusterStatus getClusterStatus(boolean detailed)
detailed - if true then report tracker names and memory usage
public ClusterMetrics getClusterMetrics()
public void killJob(JobID jobid)
throws IOException
IOExceptionJobSubmissionProtocol.killJob(org.apache.hadoop.mapred.JobID)
public void cancelDelegationToken(Token<DelegationTokenIdentifier> token)
throws IOException,
InterruptedException
token - the token to cancel
IOException
InterruptedException
public Token<DelegationTokenIdentifier> getDelegationToken(Text renewer)
throws IOException,
InterruptedException
renewer - the user other than the creator (if any) that can renew the
token
IOException
InterruptedException
public long renewDelegationToken(Token<DelegationTokenIdentifier> token)
throws IOException,
InterruptedException
token - the token to renew
IOException
InterruptedExceptionpublic void initJob(JobInProgress job)
job - JobInProgress objectpublic void failJob(JobInProgress job)
job - JobInProgress object
public void setJobPriority(JobID jobid,
String priority)
throws IOException
jobid - ID of the jobpriority - Priority to be set for the job
IOException
public JobProfile getJobProfile(JobID jobid)
throws IOException
IOException
public JobStatus getJobStatus(JobID jobid)
throws IOException
IOException
public Counters getJobCounters(JobID jobid)
throws IOException
IOException
public TaskReport[] getMapTaskReports(JobID jobid)
throws IOException
IOException
public TaskReport[] getReduceTaskReports(JobID jobid)
throws IOException
IOException
public TaskReport[] getCleanupTaskReports(JobID jobid)
throws IOException
IOException
public TaskReport[] getSetupTaskReports(JobID jobid)
throws IOException
IOException
public TaskCompletionEvent[] getTaskCompletionEvents(JobID jobid,
int fromEventId,
int maxEvents)
throws IOException
jobid - job idfromEventId - event id to start from.maxEvents - the max number of events we want to look at
IOException
public String[] getTaskDiagnostics(TaskAttemptID taskId)
throws IOException
taskId - the id of the task
IOExceptionpublic org.apache.hadoop.mapred.TaskInProgress getTip(TaskID tipid)
public boolean killTask(TaskAttemptID taskid,
boolean shouldFail)
throws IOException
taskid - the id of the task to kill.shouldFail - if true the task is failed and added to failed tasks list, otherwise
it is just killed, w/o affecting job failure status.
IOExceptionJobSubmissionProtocol.killTask(TaskAttemptID, boolean)public String getAssignedTracker(TaskAttemptID taskId)
taskId - the name of the task
public JobStatus[] jobsToComplete()
public JobStatus[] getAllJobs()
JobSubmissionProtocol.getAllJobs()public String getSystemDir()
JobSubmissionProtocol.getSystemDir()
public AccessControlList getQueueAdmins(String queueName)
throws IOException
IOExceptionJobSubmissionProtocol.getQueueAdmins(String)public JobInProgress getJob(JobID jobid)
public void refreshNodes()
throws IOException
refreshNodes in interface AdminOperationsProtocolIOExceptionpublic static String getLocalJobFilePath(JobID jobId)
jobId - id of the job
public static void main(String[] argv)
throws IOException,
InterruptedException
IOException
InterruptedException
public JobQueueInfo[] getQueues()
throws IOException
IOException
public JobQueueInfo getQueueInfo(String queue)
throws IOException
queue - Queue Name
IOException
public JobStatus[] getJobsFromQueue(String queue)
throws IOException
queue - Queue name
IOException
public QueueAclsInfo[] getQueueAclsForCurrentUser()
throws IOException
IOException
public void refreshServiceAcl()
throws IOException
RefreshAuthorizationPolicyProtocol
refreshServiceAcl in interface RefreshAuthorizationPolicyProtocolIOExceptionpublic void refreshSuperUserGroupsConfiguration()
RefreshUserMappingsProtocol
refreshSuperUserGroupsConfiguration in interface RefreshUserMappingsProtocol
public void refreshUserToGroupsMappings()
throws IOException
RefreshUserMappingsProtocol
refreshUserToGroupsMappings in interface RefreshUserMappingsProtocolIOException
public void refreshQueues()
throws IOException
AdminOperationsProtocol
refreshQueues in interface AdminOperationsProtocolIOExceptionpublic String getReasonsForBlacklisting(String host)
public String getReasonsForGraylisting(String host)
public String getHostname()
getHostname in interface JobTrackerMXBeanpublic String getVersion()
getVersion in interface JobTrackerMXBeanpublic String getConfigVersion()
getConfigVersion in interface JobTrackerMXBeanpublic int getThreadCount()
getThreadCount in interface JobTrackerMXBeanpublic String getSummaryJson()
getSummaryJson in interface JobTrackerMXBeanpublic String getAliveNodesInfoJson()
getAliveNodesInfoJson in interface JobTrackerMXBeanpublic String getBlacklistedNodesInfoJson()
getBlacklistedNodesInfoJson in interface JobTrackerMXBeanpublic String getGraylistedNodesInfoJson()
getGraylistedNodesInfoJson in interface JobTrackerMXBeanpublic String getQueueInfoJson()
getQueueInfoJson in interface JobTrackerMXBean
public boolean setSafeMode(JobTracker.SafeModeAction safeModeAction)
throws IOException
AdminOperationsProtocol
setSafeMode in interface AdminOperationsProtocolsafeModeAction - safe mode action
IOExceptionpublic boolean isInSafeMode()
|
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