Bug #39374 Agent does not restart automatically after an unexpected shutdown

Submitted:	10 Sep 2008 17:37	Modified:	11 Nov 2008 14:18
Reporter:	Diego Medina	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Enterprise Monitor: Agent	Severity:	S2 (Serious)
Version:	2.0.0.7049	OS:	Any
Assigned to:	Jan Kneschke	CPU Architecture:	Any
Tags:	kay_merlin_immediate

Description:
If the agent crashes, there is no watchdog, angel or keep alive mechanism to restart the agent and keep it running.

How to repeat:
1- Install the agent and start it
2- From a terminal, issue this command:

kill -SEGV {pid}
3- And use ps or any other tool to verify that the agent is not running any more

revno: 1046
committer: Jan Kneschke <jan@jan-kneschkes-macbook-pro.local>
branch nick: mysql-lb
timestamp: Mon 2008-10-27 21:03:19 +0100
message:
  make sure that we wait the full 180 sec if the sleep() gets interrupted
------------------------------------------------------------
revno: 1045
committer: Jan Kneschke <jan@jan-kneschkes-macbook-pro.local>
branch nick: mysql-lb
timestamp: Mon 2008-10-27 20:38:37 +0100
message:
  added process keepalive (fixes #39374)
  
  * in case of a segfault, log it and wait 185sec before we start again

Verified fixed on 2.0.0.7087

You need to add

keepalive = true to the mysql-monitor-agent.ini file

Committed revision 662.

Verified fixed on 2.0.0.7088

An entry was added to the 2.0 changelog:

If the agent crashed, there was no watchdog, angel or keep-alive mechanism to restart the agent and keep it running.

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