org.apache.hadoop.mapred.TaskTracker
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`hadoop 0.20.2-cdh3u3` | Overview | Package | Class | Statistics | Help
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## Class org.apache.hadoop.mapred.`TaskTracker`

Added interface `org.apache.hadoop.mapred.TaskTrackerMXBean`.

Changed Constructors
`TaskTracker`(`JobConf`) | Change in exceptions thrown from `java.io.IOException` to (`java.io.IOException, java.lang.InterruptedException`). | Start with the local machine name and the default JobTracker

Added Methods
`void` `fatalError`(`TaskAttemptID,` String, JvmContext) | A child task had a fatal error.
`String` `getConfigVersion`() |
`String` `getHostname`() |
`int` `getHttpPort`() |
`String` `getJobCacheSubdir`(`String`) |
`String` `getJobJarFile`(`String,` String) |
`String` `getJobTrackerUrl`() |
`String` `getLocalJobDir`(`String,` String) |
`String` `getLocalTaskDir`(`String,` String, String) |
`String` `getLocalTaskDir`(`String,` String, String, boolean) |
`String` `getPrivateDistributedCacheDir`(`String`) |
`String` `getPublicDistributedCacheDir`() |
`int` `getRpcPort`() |
`TaskController` `getTaskController`() |
`String` `getTasksInfoJson`() |
`String` `getUserDir`(`String`) |
`String` `getVersion`() |
`boolean` `isHealthy`() |
`void` `updatePrivateDistributedCacheSizes`(`JobID,` long[]) |

Changed Methods
`boolean` `canCommit`(`TaskAttemptID,` JvmContext) | Change in signature from `TaskAttemptID` to (`TaskAttemptID, JvmContext`). Change in exceptions thrown from no exceptions to `java.io.IOException`. | Child checking whether it can commit
`void` `close`() | Change in exceptions thrown from `java.io.IOException` to (`java.io.IOException, java.lang.InterruptedException`). | Close down the TaskTracker and all its components.
`void` `commitPending`(`TaskAttemptID,` TaskStatus, JvmContext) | Change in signature from (`TaskAttemptID, TaskStatus`) to (`TaskAttemptID, TaskStatus, JvmContext`). | Task is reporting that it is in commit_pending and it is waiting for the commit Response
`void` `done`(`TaskAttemptID,` JvmContext) | Change in signature from `TaskAttemptID` to (`TaskAttemptID, JvmContext`). | The task is done.
`void` `fsError`(`TaskAttemptID,` String, JvmContext) | Change in signature from (`TaskAttemptID, String`) to (`TaskAttemptID, String, JvmContext`). | A child task had a local filesystem error.
`Class` `getInstrumentationClass`(`Configuration`) | Change in return type from (`Class`) to `Class`. |
`MapTaskCompletionEventsUpdate` `getMapCompletionEvents`(`JobID,` int, int, TaskAttemptID, JvmContext) | Change in signature from (`JobID, int, int, TaskAttemptID`) to (`JobID, int, int, TaskAttemptID, JvmContext`). |
`JvmTask` `getTask`(`JvmContext`) | Change in signature from `JVMId` to `JvmContext`. | Called upon startup by the child process to fetch Task data.
`boolean` `ping`(`TaskAttemptID,` JvmContext) | Change in signature from `TaskAttemptID` to (`TaskAttemptID, JvmContext`). | Child checking to see if we're alive.
`void` `reportDiagnosticInfo`(`TaskAttemptID,` String, JvmContext) | Change in signature from (`TaskAttemptID, String`) to (`TaskAttemptID, String, JvmContext`). | Called when the task dies before completion and we want to report back diagnostic info
`void` `reportNextRecordRange`(`TaskAttemptID,` Range, JvmContext) | Change in signature from (`TaskAttemptID, Range`) to (`TaskAttemptID, Range, JvmContext`). |
`void` `setInstrumentationClass`(`Configuration,` Class) | Change in signature from (`Configuration, Class`) to (`Configuration, Class`). |
`void` `shuffleError`(`TaskAttemptID,` String, JvmContext) | Change in signature from (`TaskAttemptID, String`) to (`TaskAttemptID, String, JvmContext`). | A reduce-task failed to shuffle the map-outputs.
`void` `shutdown`() | Change in exceptions thrown from `java.io.IOException` to (`java.io.IOException, java.lang.InterruptedException`). |
`boolean` `statusUpdate`(`TaskAttemptID,` TaskStatus, JvmContext) | Change in signature from (`TaskAttemptID, TaskStatus`) to (`TaskAttemptID, TaskStatus, JvmContext`). | Called periodically to report Task progress from 0.0 to 1.0.

Added Fields
`String` `SUBDIR` |
`String` `TT_KEYTAB_FILE` |
`String` `TT_LOG_TMP_DIR` |
`String` `TT_RESOURCE_CALCULATOR_PLUGIN` |
`String` `TT_USER_NAME` |

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