[NIFI-6414] java.net.PortUnreachableException: null when using DatagramChannelSender (UDP)

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.9.2
• Fix Version/s: 1.14.0
• Component/s: Extensions
• Environment: CentOS 7 with NiFi 1.9.2
• Flags: Patch
• Assignee: Unassigned
• Reporter: Sol Huebner
• Created: 02/Jul/19 17:06
• Updated: 10/Jun/21 01:09
• Resolved: 10/Jun/21 01:09

Description

I get "java.net.PortUnreachableException: null" when I use PutSyslog using UDP. I have no issues with TCP. The issue only occurs when you try to use the connection multiple times.

I found a similar issue here: http://www.java-gaming.org/index.php?PHPSESSID=u7ufav5hekdirj9991jll36e81&topic=1751.msg16721#msg16721

So I tried to modify DatagramChannelSender.java of the nifi-processor-utils:

if (!channel.isConnected()) {
channel.socket().bind(newInetSocketAddress(InetAddress.getByName(host), port));
channel.connect(newInetSocketAddress(InetAddress.getByName(host), port));
}
 
And with the added line I have no more issues but it seems that with that extra line the NiFi tests fail. I need to spend more time to debug why.

Issue Links

• is fixed by: NIFI-8462 Refactor PutSyslog and ListenSyslog using Netty