On 12/07/2013 02:57 AM, Alan Bateman wrote:
On 07/12/2013 01:22, Dan Xu wrote:
Hi All,
When working on
src/solaris/native/sun/net/spi/DefaultProxySelector.c, previously I
tried to cached a jobject (The cached java object is
java.net.Proxy.NO_PROXY, which is a special type of Proxy.) as a
global static variable, no_proxy, in this c file. Its value is
initialized in the init() native function call. In the following
proxy query by calling native function, getSystemProxy(), I will just
return this no_proxy object if no proxy is found.
But strangely, in the case that I return this no_proxy object back to
java side, the program may throw an ClassCastException saying that
the object that is passed to java side is a java.io.FileDescriptor
instead of a java.net.Proxy. The problem only happened in jprt in
test, java/net/ProxySelector/MultiThreadedSystemProxies.java. If I
test it in my local linux, it seems always passed.
In addition, instead of caching this special proxy object, I modified
my change to create no_proxy jobject every time I need by using the
same code that I previously used to create no_proxy in the init()
function. And the change can pass the jprt test without any issue.
Does anyone know why the cached proxy object changed to a
FileDescriptor? Thanks!
-Dan
Just so I understand, did you use a JNI global when caching the reference?
-Alan
Hi Alan,
What is a JNI global? What I use here is a static global variable. I
have uploaded this file to
http://cr.openjdk.java.net/~dxu/8025437/DefaultProxySelector1.c. You can
search for "no_proxy". I have declared this variable as "static jobject'
at the beginning, and initialized it in function initJavaClass().
The error message can be found at
http://prt-web.us.oracle.com//archive/2013/12/2013-12-07-173617.dan.jdk8Repo4/logs/linux_x64-product-c2-jdk_net.log.FAILED.log
Thanks!
-Dan
