[FLINK-6644] Don't register HUP unix signal handler on Windows

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.0
• Fix Version/s: 1.3.0, 1.4.0
• Component/s: Runtime / Task
• Assignee: Chesnay Schepler
• Reporter: Chesnay Schepler
• Created: 19/May/17 15:31
• Updated: 20/May/17 17:33
• Resolved: 20/May/17 17:33

Description

The JM/TM register UNIX signal handlers for INT, HUP and TERM on startup.

On Windows, HUP is not available, causing this exception to be logged everytime:

2017-05-19 16:49:58,777 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Error while registering signal handler
java.lang.IllegalArgumentException: Unknown signal: HUP
        at sun.misc.Signal.<init>(Unknown Source)
        at org.apache.flink.runtime.util.SignalHandler$Handler.<init>(SignalHandler.java:41)
        at org.apache.flink.runtime.util.SignalHandler.register(SignalHandler.java:78)
        at org.apache.flink.runtime.taskmanager.TaskManager$.main(TaskManager.scala:1525)
        at org.apache.flink.runtime.taskmanager.TaskManager.main(TaskManager.scala)
2017-05-19 16:49:58,778 INFO  org.apache.flink.runtime.taskmanager.TaskManager              - Registered UNIX signal handlers for [TERM, INT]

Issue Links

• links to: GitHub Pull Request #3955