粗体与JRockit兼容性

问题描述:

有人在JRockit VM上运行hessian时遇到此异常吗?粗体与JRockit兼容性

Caused by: java.lang.ArrayIndexOutOfBoundsException: -418 
     at com.caucho.hessian.util.IdentityIntMap.put(IdentityIntMap.java:141) 
     at com.caucho.hessian.io.Hessian2Output.addRef(Hessian2Output.java:1285) 
     at com.caucho.hessian.io.UnsafeSerializer.writeObject(UnsafeSerializer.java:157) 
     at com.caucho.hessian.io.Hessian2Output.writeObject(Hessian2Output.java:421) 
     at com.caucho.hessian.io.CollectionSerializer.writeObject(CollectionSerializer.java:102) 
     at com.caucho.hessian.io.Hessian2Output.writeObject(Hessian2Output.java:421) 
     at com.caucho.hessian.io.UnsafeSerializer$ObjectFieldSerializer.serialize(UnsafeSerializer.java:293) 
     ... 34 more 

我花了一个星期只上解决此问题,找出麻袋正常工作与HotSpot虚拟机,但始终未能序列化使用的JRockit VM特定对象。我实际上想出了一个简单的修复方法,但它需要修改IdentityIntMap.java代码并更新hessian jar文件。

+0

如果您有修复,请把它张贴在这里(作为答案),以便人们可以找到它。 – nfechner 2012-01-17 15:17:08

这是我想出的修复。我无法弄清楚如何通知Hessian代码的维护者,所以我在这里发布它。修改文件:

com.caucho.hessian.util.IdentityIntMap.java起始于线112:

public final int get(Object key) 
{ 
    int prime = _prime; 
    // int hash = System.identityHashCode(key) % prime; 
    int hash = System.identityHashCode(key); 
    // JRockit VMs can return a negative number which will cause this method to throw an exception 
    if (hash < 0) 
    hash = -hash; 
    hash = hash % prime; 
    ... 

而且改变在下一方法的代码起始于线135:

public final int put(Object key, int value, boolean isReplace) 
{ 
    int prime = _prime; 
    // int hash = System.identityHashCode(key) % prime; 
    int hash = System.identityHashCode(key); 
    // JRockit VMs can return a negative number which will cause this method to throw an exception 
    if (hash < 0) 
    hash = -hash; 
    hash = hash % prime; 
    ...