如何检查 Ice 线程等待对象

Question

当我使用 jstack 检查进程时，我得到了这个日志：

"poolTaskThread-4" prio=10 tid=0x00007f09300ff800 nid=0x69ce in Object.wait() [0x00007f0aa5271000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:503)
at IceInternal.Outgoing.invoke(Outgoing.java:147)
- locked <0x0000000711754358> (a IceInternal.Outgoing)
at com.example.srv.slice._ContentSearchServiceDelM.searchContentsFields(_ContentSearchServiceDelM.java:188)
at com.example.srv.slice.ContentSearchServicePrxHelper.searchContentsFields(ContentSearchServicePrxHelper.java:665)
at com.example.srv.slice.ContentSearchServicePrxHelper.searchContentsFields(ContentSearchServicePrxHelper.java:629)
at com.example.srv.api.ContentSearchServiceAPI.searchContentsFields(ContentSearchServiceAPI.java:61)
at com.bbs.dao.ContentDao.getSortedContentsByNode(ContentDao.java:921)
at com.bbs.dao.ContentDao.getPublishContentListPage(ContentDao.java:613)
at com.bbs.service.ContentService.getPublishContentListPage(ContentService.java:60)
at com.example.service.impl.FindSummImpl.getArtificialContentList(FindSummImpl.java:227)
at com.example.service.impl.FindSummImpl.sortList(FindSummImpl.java:316)
at com.example.service.impl.MatcherImpl$PluginTask.dosortlist(MatcherImpl.java:654)
at com.example.service.impl.MatcherImpl$PluginTask.getPluginContentByQuery(MatcherImpl.java:720)
at com.example.service.impl.MatcherImpl$PluginTask.call(MatcherImpl.java:589)
at com.example.service.impl.MatcherImpl$PluginTask.call(MatcherImpl.java:472)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)

还有很多这样的人。首先我认为这是因为 ice 连接超时设置问题，因为我发现 Outout.java 在第 147 行是这样的：

int timeout = connection.timeout();
while(_state == StateInProgress && !timedOut)
{
try
{
if(timeout >= 0)
{
wait(timeout);
if(_state == StateInProgress)
{
timedOut = true;
}
}
else
{
wait();
}
}
catch(InterruptedException ex)
{
}
}
}
if(timedOut)
{
//
// Must be called outside the synchronization of
// this object
//
connection.exception(new Ice.TimeoutException());
//
// We must wait until the exception set above has
// propagated to this Outgoing object.
//
synchronized(this)
{
while(_state == StateInProgress)
{
try
{
wait(); //147 line
}
catch(InterruptedException ex)
{
}
}
}
}

所以我添加了 paras Ice.Override.Connection=200000，但问题出现得更早，冰线怎么办~~

Answer 1

The Ice有一个参数叫做 Ice.CacheMessageBuffer，你可以设置这个

Ice.CacheMessageBuffers=0

这样不会调用直接缓冲器，可以试试，会改进JVM GC。