[HDFS-11037] DiskBalancer: redirect stdout/stderr stream for easy tests

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: balancer & mover
• Assignee: Xiaobing Zhou
• Reporter: Xiaobing Zhou
• Created: 19/Oct/16 22:54
• Updated: 19/Oct/16 23:24

Description

Currently, disk balancer command maintains PrintStream so that it makes it easy to buffer any outputs for test verification. This is not clean approach as we might also need to adding other print streams for inputs, outputs and errors. The better way is to use System.setErr() or System.setIn(), System.setOut() to do stream redirection.