hive table missing

Hi, We are seeing a hive table is gone unexpectedly. I suspect that this must have been caused by someone somewhere issuing a "drop table" command.But it's unclear. My question is : are there other known ways for hive to lose a table besides "drop table". For example, let's say that t

pipeout files

Hi, I am seeing like one million of these files on our hadoop cluster. 1005717 files like /tmp/hdfs/hdfs_2012082902171088341605155583849.pipeout 1005742 files like /tmp/hdfs/hive_job_log_hdfs_201208290217_1000376604.txt My questions are: 1. What is a .pipeout file, and can they be deleted at