本来找了台linux服务器，打算用tomcat5.5.30和apache2.2.6搭建个集群测试环境，一切按原来的方式安装配置完毕，启动一个tomcat，居然报如下错误，虽然不影响应用正常启动，但还是没达到效果：

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，我明明设置了JAVA_OPTS参数，怎么会报内存溢出，去掉应用再启动tomcat，报错依旧。是不是JAVA_OPTS配置没起作用，如是把JAVA_OPTS的配置移到/etc/profile里面，再次启动tomcat，内存溢出的错误不报了，但不停的报下面的错误：

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的源码，找到问题代码，问题出在这个计算

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

发现这段代码重复执行了N次，第一次正常，第二次就开始报错，这里返回的 nlen 参数很大。

暂时也找不到解决办法了，没时间深入研究。

ITPub博客

"Cluster-MembershipReceiver" java.lang.OutOfMemoryError

最新文章