@InterfaceStability.Evolving public class WrappedReducer.Context extends Reducer.Context
ReduceContext.ValueIterator<VALUEIN>
Modifier and Type | Field and Description |
---|---|
protected ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> |
reduceContext |
APPLICATION_ATTEMPT_ID, APPLICATION_MASTER_CLASS, CACHE_ARCHIVES, CACHE_ARCHIVES_SIZES, CACHE_ARCHIVES_TIMESTAMPS, CACHE_ARCHIVES_VISIBILITIES, CACHE_FILE_TIMESTAMPS, CACHE_FILE_VISIBILITIES, CACHE_FILES, CACHE_FILES_SIZES, CACHE_LOCALARCHIVES, CACHE_LOCALFILES, CACHE_SYMLINK, CLASSPATH_ARCHIVES, CLASSPATH_FILES, COMBINE_CLASS_ATTR, COMBINE_RECORDS_BEFORE_PROGRESS, COMBINER_GROUP_COMPARATOR_CLASS, COMPLETED_MAPS_FOR_REDUCE_SLOWSTART, COUNTER_GROUP_NAME_MAX_DEFAULT, COUNTER_GROUP_NAME_MAX_KEY, COUNTER_GROUPS_MAX_DEFAULT, COUNTER_GROUPS_MAX_KEY, COUNTER_NAME_MAX_DEFAULT, COUNTER_NAME_MAX_KEY, COUNTERS_MAX_DEFAULT, COUNTERS_MAX_KEY, DEFAULT_JOB_ACL_MODIFY_JOB, DEFAULT_JOB_ACL_VIEW_JOB, DEFAULT_JOB_AM_ACCESS_DISABLED, DEFAULT_JOB_RUNNING_MAP_LIMIT, DEFAULT_JOB_RUNNING_REDUCE_LIMIT, DEFAULT_JOB_TOKEN_TRACKING_IDS_ENABLED, DEFAULT_LOG_LEVEL, DEFAULT_MAP_CPU_VCORES, DEFAULT_MAP_MEMORY_MB, DEFAULT_MAPRED_ADMIN_JAVA_OPTS, DEFAULT_MAPRED_ADMIN_USER_ENV, DEFAULT_MAPREDUCE_APPLICATION_CLASSPATH, DEFAULT_MAPREDUCE_CROSS_PLATFORM_APPLICATION_CLASSPATH, DEFAULT_MAPREDUCE_JOB_EMIT_TIMELINE_DATA, DEFAULT_MAX_ALLOWED_FETCH_FAILURES_FRACTION, DEFAULT_MAX_FETCH_FAILURES_NOTIFICATIONS, DEFAULT_MAX_SHUFFLE_FETCH_HOST_FAILURES, DEFAULT_MAX_SHUFFLE_FETCH_RETRY_DELAY, DEFAULT_MR_AM_ADMIN_COMMAND_OPTS, DEFAULT_MR_AM_COMMAND_OPTS, DEFAULT_MR_AM_COMMIT_WINDOW_MS, DEFAULT_MR_AM_COMMITTER_CANCEL_TIMEOUT_MS, DEFAULT_MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT, DEFAULT_MR_AM_CONTAINERLAUNCHER_THREADPOOL_INITIAL_SIZE, DEFAULT_MR_AM_CPU_VCORES, DEFAULT_MR_AM_HARD_KILL_TIMEOUT_MS, DEFAULT_MR_AM_HISTORY_COMPLETE_EVENT_FLUSH_TIMEOUT_MS, DEFAULT_MR_AM_HISTORY_JOB_COMPLETE_UNFLUSHED_MULTIPLIER, DEFAULT_MR_AM_HISTORY_MAX_UNFLUSHED_COMPLETE_EVENTS, DEFAULT_MR_AM_HISTORY_USE_BATCHED_FLUSH_QUEUE_SIZE_THRESHOLD, DEFAULT_MR_AM_IGNORE_BLACKLISTING_BLACKLISTED_NODE_PERCENT, DEFAULT_MR_AM_JOB_CLIENT_THREAD_COUNT, DEFAULT_MR_AM_JOB_REDUCE_PREEMPTION_LIMIT, DEFAULT_MR_AM_JOB_REDUCE_RAMP_UP_LIMIT, DEFAULT_MR_AM_LOG_BACKUPS, DEFAULT_MR_AM_LOG_KB, DEFAULT_MR_AM_LOG_LEVEL, DEFAULT_MR_AM_MAX_ATTEMPTS, DEFAULT_MR_AM_NUM_PROGRESS_SPLITS, DEFAULT_MR_AM_PROFILE, DEFAULT_MR_AM_STAGING_DIR, DEFAULT_MR_AM_TASK_ESTIMATOR_SMOOTH_LAMBDA_MS, DEFAULT_MR_AM_TASK_LISTENER_THREAD_COUNT, DEFAULT_MR_AM_TO_RM_HEARTBEAT_INTERVAL_MS, DEFAULT_MR_AM_TO_RM_WAIT_INTERVAL_MS, DEFAULT_MR_AM_VMEM_MB, DEFAULT_MR_CLIENT_JOB_MAX_RETRIES, DEFAULT_MR_CLIENT_JOB_RETRY_INTERVAL, DEFAULT_MR_CLIENT_MAX_RETRIES, DEFAULT_MR_CLIENT_TO_AM_IPC_MAX_RETRIES, DEFAULT_MR_CLIENT_TO_AM_IPC_MAX_RETRIES_ON_TIMEOUTS, DEFAULT_MR_ENCRYPTED_INTERMEDIATE_DATA, DEFAULT_MR_ENCRYPTED_INTERMEDIATE_DATA_BUFFER_KB, DEFAULT_MR_ENCRYPTED_INTERMEDIATE_DATA_KEY_SIZE_BITS, DEFAULT_MR_JOB_END_NOTIFICATION_TIMEOUT, DEFAULT_MR_JOB_REDUCER_PREEMPT_DELAY_SEC, DEFAULT_REDUCE_CPU_VCORES, DEFAULT_REDUCE_MEMORY_MB, DEFAULT_REDUCE_SEPARATE_SHUFFLE_LOG, DEFAULT_SHELL, DEFAULT_SHUFFLE_FETCH_RETRY_INTERVAL_MS, DEFAULT_SHUFFLE_INPUT_BUFFER_PERCENT, DEFAULT_SHUFFLE_LOG_BACKUPS, DEFAULT_SHUFFLE_LOG_KB, DEFAULT_SPECULATIVE_MINIMUM_ALLOWED_TASKS, DEFAULT_SPECULATIVE_RETRY_AFTER_NO_SPECULATE, DEFAULT_SPECULATIVE_RETRY_AFTER_SPECULATE, DEFAULT_SPECULATIVECAP_RUNNING_TASKS, DEFAULT_SPECULATIVECAP_TOTAL_TASKS, DEFAULT_SPLIT_METAINFO_MAXSIZE, DEFAULT_TASK_ISMAP, DEFAULT_TASK_LOG_BACKUPS, DEFAULT_TASK_PROFILE_PARAMS, GROUP_COMPARATOR_CLASS, HADOOP_WORK_DIR, ID, INDEX_CACHE_MEMORY_LIMIT, INPUT_FORMAT_CLASS_ATTR, IO_SORT_FACTOR, IO_SORT_MB, JAR, JAR_UNPACK_PATTERN, JOB_ACL_MODIFY_JOB, JOB_ACL_VIEW_JOB, JOB_AM_ACCESS_DISABLED, JOB_CANCEL_DELEGATION_TOKEN, JOB_CONF_FILE, JOB_JAR, JOB_JOBTRACKER_ID, JOB_LOCAL_DIR, JOB_NAME, JOB_NAMENODES, JOB_RUNNING_MAP_LIMIT, JOB_RUNNING_REDUCE_LIMIT, JOB_SPLIT, JOB_SPLIT_METAINFO, JOB_SUBMIT_DIR, JOB_SUBMITHOST, JOB_SUBMITHOSTADDR, JOB_TAGS, JOB_TOKEN_TRACKING_IDS, JOB_TOKEN_TRACKING_IDS_ENABLED, JOB_UBERTASK_ENABLE, JOB_UBERTASK_MAXBYTES, JOB_UBERTASK_MAXMAPS, JOB_UBERTASK_MAXREDUCES, JVM_NUMTASKS_TORUN, KEY_COMPARATOR, MAP_CLASS_ATTR, MAP_COMBINE_MIN_SPILLS, MAP_CPU_VCORES, MAP_DEBUG_SCRIPT, MAP_ENV, MAP_FAILURES_MAX_PERCENT, MAP_INPUT_FILE, MAP_INPUT_PATH, MAP_INPUT_START, MAP_JAVA_OPTS, MAP_LOG_LEVEL, MAP_MAX_ATTEMPTS, MAP_MEMORY_MB, MAP_OUTPUT_COLLECTOR_CLASS_ATTR, MAP_OUTPUT_COMPRESS, MAP_OUTPUT_COMPRESS_CODEC, MAP_OUTPUT_KEY_CLASS, MAP_OUTPUT_KEY_FIELD_SEPERATOR, MAP_OUTPUT_VALUE_CLASS, MAP_SKIP_INCR_PROC_COUNT, MAP_SKIP_MAX_RECORDS, MAP_SORT_SPILL_PERCENT, MAP_SPECULATIVE, MAPRED_ADMIN_USER_ENV, MAPRED_ADMIN_USER_SHELL, MAPRED_MAP_ADMIN_JAVA_OPTS, MAPRED_REDUCE_ADMIN_JAVA_OPTS, MAPREDUCE_APPLICATION_CLASSPATH, MAPREDUCE_APPLICATION_FRAMEWORK_PATH, MAPREDUCE_JOB_CLASSLOADER, MAPREDUCE_JOB_CLASSLOADER_SYSTEM_CLASSES, MAPREDUCE_JOB_CREDENTIALS_BINARY, MAPREDUCE_JOB_DIR, MAPREDUCE_JOB_EMIT_TIMELINE_DATA, MAPREDUCE_JOB_LOG4J_PROPERTIES_FILE, MAPREDUCE_JOB_SHUFFLE_PROVIDER_SERVICES, MAPREDUCE_JOB_USER_CLASSPATH_FIRST, MAPREDUCE_V2_CHILD_CLASS, MAX_ALLOWED_FETCH_FAILURES_FRACTION, MAX_FETCH_FAILURES_NOTIFICATIONS, MAX_SHUFFLE_FETCH_HOST_FAILURES, MAX_SHUFFLE_FETCH_RETRY_DELAY, MAX_TASK_FAILURES_PER_TRACKER, MR_AM_ADMIN_COMMAND_OPTS, MR_AM_ADMIN_USER_ENV, MR_AM_COMMAND_OPTS, MR_AM_COMMIT_WINDOW_MS, MR_AM_COMMITTER_CANCEL_TIMEOUT_MS, MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT, MR_AM_CONTAINERLAUNCHER_THREADPOOL_INITIAL_SIZE, MR_AM_CPU_VCORES, MR_AM_CREATE_JH_INTERMEDIATE_BASE_DIR, MR_AM_ENV, MR_AM_HARD_KILL_TIMEOUT_MS, MR_AM_HISTORY_COMPLETE_EVENT_FLUSH_TIMEOUT_MS, MR_AM_HISTORY_JOB_COMPLETE_UNFLUSHED_MULTIPLIER, MR_AM_HISTORY_MAX_UNFLUSHED_COMPLETE_EVENTS, MR_AM_HISTORY_USE_BATCHED_FLUSH_QUEUE_SIZE_THRESHOLD, MR_AM_IGNORE_BLACKLISTING_BLACKLISTED_NODE_PERECENT, MR_AM_JOB_CLIENT_PORT_RANGE, MR_AM_JOB_CLIENT_THREAD_COUNT, MR_AM_JOB_NODE_BLACKLISTING_ENABLE, MR_AM_JOB_RECOVERY_ENABLE, MR_AM_JOB_RECOVERY_ENABLE_DEFAULT, MR_AM_JOB_REDUCE_PREEMPTION_LIMIT, MR_AM_JOB_REDUCE_RAMPUP_UP_LIMIT, MR_AM_JOB_SPECULATOR, MR_AM_LOG_BACKUPS, MR_AM_LOG_KB, MR_AM_LOG_LEVEL, MR_AM_MAX_ATTEMPTS, MR_AM_NUM_PROGRESS_SPLITS, MR_AM_PREFIX, MR_AM_PROFILE, MR_AM_PROFILE_PARAMS, MR_AM_SECURITY_SERVICE_AUTHORIZATION_CLIENT, MR_AM_SECURITY_SERVICE_AUTHORIZATION_TASK_UMBILICAL, MR_AM_STAGING_DIR, MR_AM_TASK_ESTIMATOR, MR_AM_TASK_ESTIMATOR_EXPONENTIAL_RATE_ENABLE, MR_AM_TASK_ESTIMATOR_SMOOTH_LAMBDA_MS, MR_AM_TASK_LISTENER_THREAD_COUNT, MR_AM_TO_RM_HEARTBEAT_INTERVAL_MS, MR_AM_TO_RM_WAIT_INTERVAL_MS, MR_AM_VMEM_MB, MR_APPLICATION_TYPE, MR_CLIENT_JOB_MAX_RETRIES, MR_CLIENT_JOB_RETRY_INTERVAL, MR_CLIENT_MAX_RETRIES, MR_CLIENT_TO_AM_IPC_MAX_RETRIES, MR_CLIENT_TO_AM_IPC_MAX_RETRIES_ON_TIMEOUTS, MR_ENCRYPTED_INTERMEDIATE_DATA, MR_ENCRYPTED_INTERMEDIATE_DATA_BUFFER_KB, MR_ENCRYPTED_INTERMEDIATE_DATA_KEY_SIZE_BITS, MR_JOB_END_NOTIFICATION_MAX_ATTEMPTS, MR_JOB_END_NOTIFICATION_MAX_RETRY_INTERVAL, MR_JOB_END_NOTIFICATION_PROXY, MR_JOB_END_NOTIFICATION_TIMEOUT, MR_JOB_END_NOTIFICATION_URL, MR_JOB_END_RETRY_ATTEMPTS, MR_JOB_END_RETRY_INTERVAL, MR_JOB_REDUCER_PREEMPT_DELAY_SEC, MR_PREFIX, NUM_MAP_PROFILES, NUM_MAPS, NUM_REDUCE_PROFILES, NUM_REDUCES, OUTPUT, OUTPUT_FORMAT_CLASS_ATTR, OUTPUT_KEY_CLASS, OUTPUT_VALUE_CLASS, PARTITIONER_CLASS_ATTR, PRESERVE_FAILED_TASK_FILES, PRESERVE_FILES_PATTERN, PRIORITY, QUEUE_NAME, RECORDS_BEFORE_PROGRESS, REDUCE_CLASS_ATTR, REDUCE_CPU_VCORES, REDUCE_DEBUG_SCRIPT, REDUCE_ENV, REDUCE_FAILURES_MAXPERCENT, REDUCE_INPUT_BUFFER_PERCENT, REDUCE_JAVA_OPTS, REDUCE_LOG_LEVEL, REDUCE_MARKRESET_BUFFER_PERCENT, REDUCE_MARKRESET_BUFFER_SIZE, REDUCE_MAX_ATTEMPTS, REDUCE_MEMORY_MB, REDUCE_MEMORY_TOTAL_BYTES, REDUCE_MEMTOMEM_ENABLED, REDUCE_MEMTOMEM_THRESHOLD, REDUCE_MERGE_INMEM_THRESHOLD, REDUCE_SEPARATE_SHUFFLE_LOG, REDUCE_SKIP_INCR_PROC_COUNT, REDUCE_SKIP_MAXGROUPS, REDUCE_SPECULATIVE, RESERVATION_ID, SETUP_CLEANUP_NEEDED, SHUFFLE_CONNECT_TIMEOUT, SHUFFLE_FETCH_FAILURES, SHUFFLE_FETCH_RETRY_ENABLED, SHUFFLE_FETCH_RETRY_INTERVAL_MS, SHUFFLE_FETCH_RETRY_TIMEOUT_MS, SHUFFLE_INPUT_BUFFER_PERCENT, SHUFFLE_LOG_BACKUPS, SHUFFLE_LOG_KB, SHUFFLE_MEMORY_LIMIT_PERCENT, SHUFFLE_MERGE_PERCENT, SHUFFLE_NOTIFY_READERROR, SHUFFLE_PARALLEL_COPIES, SHUFFLE_READ_TIMEOUT, SKIP_OUTDIR, SKIP_RECORDS, SKIP_START_ATTEMPTS, SPECULATIVE_MINIMUM_ALLOWED_TASKS, SPECULATIVE_RETRY_AFTER_NO_SPECULATE, SPECULATIVE_RETRY_AFTER_SPECULATE, SPECULATIVE_SLOWNODE_THRESHOLD, SPECULATIVE_SLOWTASK_THRESHOLD, SPECULATIVECAP, SPECULATIVECAP_RUNNING_TASKS, SPECULATIVECAP_TOTAL_TASKS, SPLIT_FILE, SPLIT_METAINFO_MAXSIZE, STDERR_LOGFILE_ENV, STDOUT_LOGFILE_ENV, TASK_ATTEMPT_ID, TASK_CLEANUP_NEEDED, TASK_DEBUGOUT_LINES, TASK_ID, TASK_ISMAP, TASK_LOG_BACKUPS, TASK_MAP_PROFILE_PARAMS, TASK_OUTPUT_DIR, TASK_PARTITION, TASK_PROFILE, TASK_PROFILE_PARAMS, TASK_REDUCE_PROFILE_PARAMS, TASK_TIMEOUT, TASK_TIMEOUT_CHECK_INTERVAL_MS, TASK_USERLOG_LIMIT, USER_LOG_RETAIN_HOURS, USER_NAME, WORKDIR, WORKFLOW_ADJACENCY_PREFIX_PATTERN, WORKFLOW_ADJACENCY_PREFIX_STRING, WORKFLOW_ID, WORKFLOW_NAME, WORKFLOW_NODE_NAME, WORKFLOW_TAGS, WORKING_DIR
Constructor and Description |
---|
Context(ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> reduceContext) |
Modifier and Type | Method and Description |
---|---|
org.apache.hadoop.fs.Path[] |
getArchiveClassPaths()
Get the archive entries in classpath as an array of Path
|
String[] |
getArchiveTimestamps()
Get the timestamps of the archives.
|
URI[] |
getCacheArchives()
Get cache archives set in the Configuration
|
URI[] |
getCacheFiles()
Get cache files set in the Configuration
|
Class<? extends Reducer<?,?,?,?>> |
getCombinerClass()
Get the combiner class for the job.
|
org.apache.hadoop.io.RawComparator<?> |
getCombinerKeyGroupingComparator()
Get the user defined
RawComparator comparator for
grouping keys of inputs to the combiner. |
org.apache.hadoop.conf.Configuration |
getConfiguration()
Return the configuration for the job.
|
Counter |
getCounter(Enum counterName)
Get the
Counter for the given counterName . |
Counter |
getCounter(String groupName,
String counterName)
|
org.apache.hadoop.security.Credentials |
getCredentials()
Get credentials for the job.
|
KEYIN |
getCurrentKey()
Get the current key.
|
VALUEIN |
getCurrentValue()
Get the current value.
|
org.apache.hadoop.fs.Path[] |
getFileClassPaths()
Get the file entries in classpath as an array of Path
|
String[] |
getFileTimestamps()
Get the timestamps of the files.
|
org.apache.hadoop.io.RawComparator<?> |
getGroupingComparator()
Get the user defined
RawComparator comparator for
grouping keys of inputs to the reduce. |
Class<? extends InputFormat<?,?>> |
getInputFormatClass()
Get the
InputFormat class for the job. |
String |
getJar()
Get the pathname of the job's jar.
|
JobID |
getJobID()
Get the unique ID for the job.
|
String |
getJobName()
Get the user-specified job name.
|
boolean |
getJobSetupCleanupNeeded()
Get whether job-setup and job-cleanup is needed for the job
|
org.apache.hadoop.fs.Path[] |
getLocalCacheArchives()
Return the path array of the localized caches
|
org.apache.hadoop.fs.Path[] |
getLocalCacheFiles()
Return the path array of the localized files
|
Class<?> |
getMapOutputKeyClass()
Get the key class for the map output data.
|
Class<?> |
getMapOutputValueClass()
Get the value class for the map output data.
|
Class<? extends Mapper<?,?,?,?>> |
getMapperClass()
Get the
Mapper class for the job. |
int |
getMaxMapAttempts()
Get the configured number of maximum attempts that will be made to run a
map task, as specified by the
mapred.map.max.attempts
property. |
int |
getMaxReduceAttempts()
Get the configured number of maximum attempts that will be made to run a
reduce task, as specified by the
mapred.reduce.max.attempts
property. |
int |
getNumReduceTasks()
Get configured the number of reduce tasks for this job.
|
OutputCommitter |
getOutputCommitter()
Get the
OutputCommitter for the task-attempt. |
Class<? extends OutputFormat<?,?>> |
getOutputFormatClass()
Get the
OutputFormat class for the job. |
Class<?> |
getOutputKeyClass()
Get the key class for the job output data.
|
Class<?> |
getOutputValueClass()
Get the value class for job outputs.
|
Class<? extends Partitioner<?,?>> |
getPartitionerClass()
Get the
Partitioner class for the job. |
boolean |
getProfileEnabled()
Get whether the task profiling is enabled.
|
String |
getProfileParams()
Get the profiler configuration arguments.
|
org.apache.hadoop.conf.Configuration.IntegerRanges |
getProfileTaskRange(boolean isMap)
Get the range of maps or reduces to profile.
|
float |
getProgress()
The current progress of the task attempt.
|
Class<? extends Reducer<?,?,?,?>> |
getReducerClass()
Get the
Reducer class for the job. |
org.apache.hadoop.io.RawComparator<?> |
getSortComparator()
Get the
RawComparator comparator used to compare keys. |
String |
getStatus()
Get the last set status message.
|
boolean |
getSymlink()
Originally intended to check if symlinks should be used, but currently
symlinks cannot be disabled.
|
TaskAttemptID |
getTaskAttemptID()
Get the unique name for this task attempt.
|
boolean |
getTaskCleanupNeeded()
Get whether task-cleanup is needed for the job
|
String |
getUser()
Get the reported username for this job.
|
Iterable<VALUEIN> |
getValues()
Iterate through the values for the current key, reusing the same value
object, which is stored in the context.
|
org.apache.hadoop.fs.Path |
getWorkingDirectory()
Get the current working directory for the default file system.
|
boolean |
nextKey()
Start processing next unique key.
|
boolean |
nextKeyValue()
Advance to the next key, value pair, returning null if at end.
|
void |
progress() |
void |
setStatus(String msg)
Set the current status of the task to the given string.
|
void |
write(KEYOUT key,
VALUEOUT value)
Generate an output key/value pair.
|
protected ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> reduceContext
public Context(ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> reduceContext)
public KEYIN getCurrentKey() throws IOException, InterruptedException
TaskInputOutputContext
IOException
InterruptedException
public VALUEIN getCurrentValue() throws IOException, InterruptedException
TaskInputOutputContext
IOException
InterruptedException
public boolean nextKeyValue() throws IOException, InterruptedException
TaskInputOutputContext
IOException
InterruptedException
public Counter getCounter(Enum counterName)
TaskAttemptContext
Counter
for the given counterName
.counterName
- counter nameCounter
for the given counterName
public Counter getCounter(String groupName, String counterName)
TaskAttemptContext
counterName
- counter nameCounter
for the given groupName
and
counterName
public OutputCommitter getOutputCommitter()
TaskInputOutputContext
OutputCommitter
for the task-attempt.OutputCommitter
for the task-attemptpublic void write(KEYOUT key, VALUEOUT value) throws IOException, InterruptedException
TaskInputOutputContext
IOException
InterruptedException
public String getStatus()
TaskAttemptContext
public TaskAttemptID getTaskAttemptID()
TaskAttemptContext
public void setStatus(String msg)
TaskAttemptContext
public org.apache.hadoop.fs.Path[] getArchiveClassPaths()
JobContext
public String[] getArchiveTimestamps()
JobContext
public URI[] getCacheArchives() throws IOException
JobContext
IOException
public URI[] getCacheFiles() throws IOException
JobContext
IOException
public Class<? extends Reducer<?,?,?,?>> getCombinerClass() throws ClassNotFoundException
JobContext
ClassNotFoundException
public org.apache.hadoop.conf.Configuration getConfiguration()
JobContext
public org.apache.hadoop.fs.Path[] getFileClassPaths()
JobContext
public String[] getFileTimestamps()
JobContext
public org.apache.hadoop.io.RawComparator<?> getCombinerKeyGroupingComparator()
JobContext
RawComparator
comparator for
grouping keys of inputs to the combiner.Job.setCombinerKeyGroupingComparatorClass(Class)
public org.apache.hadoop.io.RawComparator<?> getGroupingComparator()
JobContext
RawComparator
comparator for
grouping keys of inputs to the reduce.Job.setGroupingComparatorClass(Class)
,
JobContext.getCombinerKeyGroupingComparator()
public Class<? extends InputFormat<?,?>> getInputFormatClass() throws ClassNotFoundException
JobContext
InputFormat
class for the job.InputFormat
class for the job.ClassNotFoundException
public String getJar()
JobContext
public JobID getJobID()
JobContext
public String getJobName()
JobContext
public boolean getJobSetupCleanupNeeded()
JobContext
public boolean getTaskCleanupNeeded()
JobContext
public org.apache.hadoop.fs.Path[] getLocalCacheArchives() throws IOException
JobContext
IOException
public org.apache.hadoop.fs.Path[] getLocalCacheFiles() throws IOException
JobContext
IOException
public Class<?> getMapOutputKeyClass()
JobContext
public Class<?> getMapOutputValueClass()
JobContext
public Class<? extends Mapper<?,?,?,?>> getMapperClass() throws ClassNotFoundException
JobContext
Mapper
class for the job.Mapper
class for the job.ClassNotFoundException
public int getMaxMapAttempts()
JobContext
mapred.map.max.attempts
property. If this property is not already set, the default is 4 attempts.public int getMaxReduceAttempts()
JobContext
mapred.reduce.max.attempts
property. If this property is not already set, the default is 4 attempts.public int getNumReduceTasks()
JobContext
1
.public Class<? extends OutputFormat<?,?>> getOutputFormatClass() throws ClassNotFoundException
JobContext
OutputFormat
class for the job.OutputFormat
class for the job.ClassNotFoundException
public Class<?> getOutputKeyClass()
JobContext
public Class<?> getOutputValueClass()
JobContext
public Class<? extends Partitioner<?,?>> getPartitionerClass() throws ClassNotFoundException
JobContext
Partitioner
class for the job.Partitioner
class for the job.ClassNotFoundException
public Class<? extends Reducer<?,?,?,?>> getReducerClass() throws ClassNotFoundException
JobContext
Reducer
class for the job.Reducer
class for the job.ClassNotFoundException
public org.apache.hadoop.io.RawComparator<?> getSortComparator()
JobContext
RawComparator
comparator used to compare keys.RawComparator
comparator used to compare keys.public boolean getSymlink()
JobContext
public org.apache.hadoop.fs.Path getWorkingDirectory() throws IOException
JobContext
IOException
public void progress()
public Iterable<VALUEIN> getValues() throws IOException, InterruptedException
ReduceContext
IOException
InterruptedException
public boolean nextKey() throws IOException, InterruptedException
ReduceContext
IOException
InterruptedException
public boolean getProfileEnabled()
JobContext
public String getProfileParams()
JobContext
public org.apache.hadoop.conf.Configuration.IntegerRanges getProfileTaskRange(boolean isMap)
JobContext
isMap
- is the task a map?public String getUser()
JobContext
public org.apache.hadoop.security.Credentials getCredentials()
JobContext
public float getProgress()
TaskAttemptContext
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