[IMPALA-4937] Remove unused kudu scanner keep alive vairable

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 2.9.0
• Fix Version/s: Impala 2.9.0
• Component/s: Backend
• Assignee: Matthew Jacobs
• Reporter: Mostafa Mokhtar
• Created: 15/Feb/17 17:43
• Updated: 16/Feb/17 22:34
• Resolved: 16/Feb/17 22:34

Description

Noticed these two duplicate flag, looked through the code and it appears that kudu_scanner_keep_alive_period_us is defined and unused in the code.
This can be confusing if someone tries to set a safety valve.

DEFINE_int32(kudu_scanner_keep_alive_period_us, 15 * 1000L * 1000L,
    "The period at which Kudu Scanners should send keep-alive requests to the tablet "
    "server to ensure that scanners do not time out.");

kudu_scanner_keep_alive_period_us (int32)	The period at which Kudu Scanners should send keep-alive requests to the tablet server to ensure that scanners do not time out.	15000000	15000000
kudu_scanner_keep_alive_period_sec (int32)	The period at which Kudu Scanners should send keep-alive requests to the tablet server to ensure that scanners do not time out.	15	15