[jira] [Closed] (UIMA-4773) UIMA DUCC: JP throws BindException on startup if port is not available

["Jerry Cwiklik (JIRA)" <de...@uima.apache.org>]

     [ https://issues.apache.org/jira/browse/UIMA-4773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jerry Cwiklik closed UIMA-4773.
-------------------------------
    Resolution: Fixed

Modified Agent and JP to stop using Socket for private socket channel for communicating STOP requests. Instead an agent sends SIGTERM to force JP to stop

> UIMA DUCC: JP throws BindException on startup if port is not available
> ----------------------------------------------------------------------
>
>                 Key: UIMA-4773
>                 URL: https://issues.apache.org/jira/browse/UIMA-4773
>             Project: UIMA
>          Issue Type: Bug
>          Components: DUCC
>            Reporter: Jerry Cwiklik
>            Assignee: Jerry Cwiklik
>             Fix For: 2.1.0-Ducc
>
>
> On startup a JP throws 
>  java.net.BindException: Address already in use
> A JP starts a Camel route on a socket to listen for agent STOP requests. This route can fail if a socket port is not available.
> Change Agent to send SIGTERM signal to JP to force an orderly shutdown instead of sending a STOP request over a dedicated socket channel. with this change, the JP no longer needs to create a Camel route over socket listener. Instead it just needs to catch the SIGTERM signal, quiesce and stop. 
> The Agent will send SIGKILL (-9) to a process that refuses to stop for SIGTERM.



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