Hi, I have a map-reduce job that was developed for MRV1 and is now being run daily with no modifications in a hadoop 2.2 cluster with MRV2.
For the first week at least the job worked as expected but now some days the job takes a long time to start (like 30-50 minutes). The job starts a large number of mappers (around 525) and it usually just took a couple of minutes for it to start. Also, there are no other jobs running at the same time. Any ideas what might be causing this? Thanks, Juan.
