there should be a protocol for a map or reduce task to tell the jobtracker its alive ------------------------------------------------------------------------------------
Key: HADOOP-491 URL: http://issues.apache.org/jira/browse/HADOOP-491 Project: Hadoop Issue Type: New Feature Components: mapred Reporter: arkady borkovsky Currently, the jobtracker relies on task to write something to the output to know the tasks are still alive. There is a 600 seconds timeout preset. Some tasks spend longer that 600 seconds without any output while being perfectly healthy. It would be good to have an API for a task to explicitly tell the jobtracker it is alive. There are certain dangers with this protocol: e.g. a task can run a separate thread that does nothing but send "i'm alive" message. This would be a user bug to abuse the API in such way. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira