[jboss-jira] [JBoss JIRA] (JGRP-1893) ENCRYPT: Thread safety issues during key changes

[Borisa Zivkovic (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016578#comment-13016578 ] 

Borisa Zivkovic commented on JGRP-1893:
---------------------------------------

I am getting same exception (Windows 8, Hotspot  (build 1.7.0_51-b13), JGroups 3.5.1.Final

Nov 02, 2014 3:01:59 PM org.jgroups.logging.JDKLogImpl error
SEVERE: failed setting ip_ttl
java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.jgroups.protocols.UDP.setTimeToLive(UDP.java:339)
	at org.jgroups.protocols.UDP.createSockets(UDP.java:368)
	at org.jgroups.protocols.UDP.start(UDP.java:270)
	at org.jgroups.stack.ProtocolStack.startStack(ProtocolStack.java:966)
	at org.jgroups.JChannel.startStack(JChannel.java:889)
	at org.jgroups.JChannel._preConnect(JChannel.java:547)
	at org.jgroups.JChannel.connect(JChannel.java:282)
	at org.jgroups.JChannel.connect(JChannel.java:273)

I am using udp.xml from jgroups-3.5.1.Fina.jar

> ENCRYPT: Thread safety issues during key changes
> ------------------------------------------------
>
>                 Key: JGRP-1893
>                 URL: https://issues.jboss.org/browse/JGRP-1893
>             Project: JGroups
>          Issue Type: Bug
>            Reporter: Tero Leppikangas
>            Assignee: Bela Ban
>
> For symmetric encryption, ENCRYPT has members with shared state: secret key, version and ciphers. In order for to provide consistent state between different threads accessing these members, they should be synchronized.
> I have implemented one solution by wrapping the state in separate object which can be found here:
> https://github.com/tepitebson/JGroups/tree/ENCRYPT_Thread_safety
> I also have replaced the WeakHashMap holding the previous keys with Cache in google's guava library so my solution probably is not suitable for an official solution.



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