Problem 

A normal build job is over with complete build logs including the last line like

Finished: SUCCESS

or

Finished: FAILURE

But I got a build job ended with incomplete build logs. That build logs don't have a last status message (SUCCESS/FAILURE).

Also, They don't have log text after some time.

• A build is in progress. But its logs has not been updated on  the web UI
• When I checked a build process on a agent at that time, it was a normal status and  in-progess
• A build process on a agent wasn't terminated .
• There is no termination  signal on a log text 

After a process was over on an agent, a build job was over on a master. But there is no additional message on it. 

Is there anyone who has an experience like this case?.