I noticed a tasktracker (not a new node) starts to do hearbeating with job
tracker after couple of minutes. What can cause this?
Here's log output when a task tracker is restarted after a clean shutdown of
the cluster but it hangs for 9 minutes (network connection was good when the tt
started):
...
2010-09-24 17:16:54,478 INFO org.apache.hadoop.ipc.Server: IPC Server handler
20 on 39197: starting
2010-09-24 17:16:54,486 INFO org.apache.hadoop.ipc.Server: IPC Server handler
21 on 39197: starting
2010-09-24 17:16:54,486 INFO org.apache.hadoop.mapred.TaskTracker: TaskTracker
up at: localhost.localdomain/127.0.0.1:39197
2010-09-24 17:16:54,486 INFO org.apache.hadoop.mapred.TaskTracker: Starting
tracker
tracker_hostname:localhost.localdomain/127.0.0.1:39197
>>>>>>>>>>>>>>>>>>>>>>>>> 9 minutes!
2010-09-24 17:35:28,864 INFO org.apache.hadoop.mapred.TaskTracker: Starting
thread: Map-events fetcher for all reduce tasks on
tracker_hostname:localhost.localdomain/127.0.0.1:39197
...
Thanks!
Michael
