[MAPREDUCE-834] When TaskTracker config use old memory management values its memory monitoring is diabled.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.20.1
• Hadoop Flags: Reviewed
• Release Note: The tasktracker's startup code was modified to use deprecated memory management configuration variables, when specified, and enable memory monitoring of tasks.
• Assignee: Sreekanth Ramakrishnan
• Reporter: Karam Singh
• Created: 07/Aug/09 09:59
• Updated: 28/Aug/09 05:55
• Resolved: 21/Aug/09 05:35

Description

TaskTracker memory config values -:
mapred.tasktracker.vmem.reserved=8589934592
mapred.task.default.maxvmem=2147483648
mapred.task.limit.maxvmem=4294967296
mapred.tasktracker.pmem.reserved=2147483648
TaskTracker start as -:
2009-08-05 12:39:03,308 WARN org.apache.hadoop.mapred.TaskTracker: The variable mapred.tasktracker.vmem.reserved is no longer used
2009-08-05 12:39:03,308 WARN org.apache.hadoop.mapred.TaskTracker: The variable mapred.tasktracker.pmem.reserved is no longer used
2009-08-05 12:39:03,308 WARN org.apache.hadoop.mapred.TaskTracker: The variable mapred.task.default.maxvmem is no longer used
2009-08-05 12:39:03,308 WARN org.apache.hadoop.mapred.TaskTracker: The variable mapred.task.limit.maxvmem is no longer used
2009-08-05 12:39:03,308 INFO org.apache.hadoop.mapred.TaskTracker: Starting thread: Map-events fetcher for all reduce tasks on <tracker_name>
2009-08-05 12:39:03,309 INFO org.apache.hadoop.mapred.TaskTracker: Using MemoryCalculatorPlugin : org.apache.hadoop.util.LinuxMemoryCalculatorPlugin@19be4777
2009-08-05 12:39:03,311 WARN org.apache.hadoop.mapred.TaskTracker: TaskTracker's totalMemoryAllottedForTasks is -1. TaskMemoryManager is disabled.