[jboss-jira] [JBoss JIRA] (JGRP-1792) "No buffer space available" when sending on Mac OS

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-1792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban updated JGRP-1792:
---------------------------

    Attachment: mcast2.java


Use mcast2 as a test to reproduce this:
* Run mcast2
* Press '1' a couple of time and the warning will be shown

> "No buffer space available" when sending on Mac OS
> --------------------------------------------------
>
>                 Key: JGRP-1792
>                 URL: https://issues.jboss.org/browse/JGRP-1792
>             Project: JGroups
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>            Priority: Minor
>             Fix For: 3.5
>
>         Attachments: mcast2.java
>
>
> When sending multicast messages (with MPerf & fast.xml), the following message appears:
> {noformat}
> 8981 [ERROR] UDP: JGRP000029: A: failed sending message to cluster (1053 bytes): java.io.IOException: No buffer space available, 
> headers: MPerf: DATA999, NAKACK2: [MSG, seqno=1003], UDP: [cluster_name=mperf]
> {noformat}
> The messages *are* received, but the error message occurs on almost every message (1 sender thread sending 1000 messages).
> With {{UdpPerf}} (also shipped with JGroups), which also multicasts messages, the error doesn't happen.
> With {{UPerf}}, which uses unicasts, the error doesn't occur either.
> Todo: compare UdpPerf to MPerf (UDP protocol) to see what the diff is.



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