"Cluster-MembershipReceiver" java.lang.OutOfMemoryError

本來找了臺linux伺服器，打算用tomcat5.5.30和apache2.2.6搭建個叢集測試環境，一切按原來的方式安裝配置完畢，啟動一個tomcat，居然報如下錯誤，雖然不影響應用正常啟動，但還是沒達到效果：

警告: Error receiving mcast package (errorCounter=0). Sleeping 500 ms
java.lang.ArrayIndexOutOfBoundsException
        at java.lang.System.arraycopy(Native Method)
        at org.apache.catalina.cluster.mcast.McastMember.getMember(McastMember.java:175)
        at org.apache.catalina.cluster.mcast.McastServiceImpl.receive(McastServiceImpl.java:265)
        at org.apache.catalina.cluster.mcast.McastServiceImpl$ReceiverThread.run(McastServiceImpl.java:355)
Exception in thread "Cluster-MembershipReceiver" java.lang.OutOfMemoryError: Java heap space
        at org.apache.catalina.cluster.mcast.McastMember.getMember(McastMember.java:174)
        at org.apache.catalina.cluster.mcast.McastServiceImpl.receive(McastServiceImpl.java:265)
        at org.apache.catalina.cluster.mcast.McastServiceImpl$ReceiverThread.run(McastServiceImpl.java:355)
2012-9-24 16:07:25 org.apache.catalina.cluster.mcast.McastService registerMBean

 

奇怪了，我明明設定了JAVA_OPTS引數，怎麼會報記憶體溢位，去掉應用再啟動tomcat，報錯依舊。是不是JAVA_OPTS配置沒起作用，如是把JAVA_OPTS的配置移到/etc/profile裡面，再次啟動tomcat，記憶體溢位的錯誤不報了，但不停的報下面的錯誤：

警告: Error receiving mcast package (errorCounter=0). Sleeping 500 ms
java.lang.ArrayIndexOutOfBoundsException
        at java.lang.System.arraycopy(Native Method)
        at org.apache.catalina.cluster.mcast.McastMember.getMember(McastMember.java:175)
        at org.apache.catalina.cluster.mcast.McastServiceImpl.receive(McastServiceImpl.java:265)
        at org.apache.catalina.cluster.mcast.McastServiceImpl$ReceiverThread.run(McastServiceImpl.java:355)
2012-9-24 17:10:40 org.apache.catalina.cluster.mcast.McastService registerMBean

 

找到tomcat5.5的原始碼，找到問題程式碼，問題出在這個計算

byte[] nlend = new byte[4];
System.arraycopy(data, 16, nlend, 0, 4);
int nlen = XByteBuffer.toInt(nlend, 0);

發現這段程式碼重複執行了N次，第一次正常，第二次就開始報錯，這裡返回的 nlen 引數很大。

 

暫時也找不到解決辦法了，沒時間深入研究。