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JEAP 6&5 - 確定你的UDP環境

到一個客戶那裡,發現它cluster 怎樣都裝不起來,
因為我不是OS 的工程師,也不確定他們的網管是怎麼限制Policy的,
測試了一下,才發現是他們的UDP  這個Protocol 不work。
(因為JBoss Default Cluster 的機制是靠 UDP傳送的)。

要如何測試?
請先下載這個JAR檔,如果你是用EAP 5 , 那你其實可以在$JBOSS_HOME/server/production/lib下找到
(如果你是下載的,請記得把檔案的附檔名從.zip 改為.jar)

確定有這個jgroups.jar檔在你的執行目錄下之後
執行以下這段啟動接收者

java -cp jgroups.jar org.jgroups.tests.McastReceiverTest -mcast_addr 224.10.10.10 -port 5555
在另一個視窗,同一個路徑下執行發送者。
java -cp jgroups.jar org.jgroups.tests.McastSenderTest -mcast_addr 224.10.10.10 -port 5555
確定之後,在發送者打幾個字,接收者應該就可以收到了。

如果不行,因為原因有很多種,請洽網管或是管理OS主機人員研究拉!

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