The pits in HADOOP.
Step on the pit sticker and record it yourself so as not to fall into it later.
Current version:
HADOOP 2.7.1
1. Hostname and IP addr
Although the hadoop documentation says that it can be configured with an ip address, it doesn't work, and the hostname must be configured.
Hostname pit: does not allow to include underscores, if it contains underscores, the error message is even more incomprehensible.
2. Hive serve's pit
Unlike executing the hive command on the server, hiveserve2 is prone to memory overflow.
Constantly updating.
