Domino中Java代理循环可能出现问题
前几天在domino后台发现有错误报出：
AllocHandle: OUT OF PRIVATE HANDLES! -- pid 000039F8 Handles used so far 6399, Maximum handles = 16446, error = 0x107
检查程序代码后确定问题出现在一个java定时代理的循环中。
View docView = config.app_db.getView("ALLDOC");
Document middleDoc;
Document curDoc = docView.getFirstDocument();
Vector cal = new Vector();
while (curDoc != null){
middleDoc = docView.getNextDocument(curDoc);
cal = session.evaluate(config.arc_create_fomular, curDoc);
if (cal.get(0).toString().equals("1.0")){
correspond += 1;
}
curDoc = middleDoc;
if (correspond >= config.maxArchive) break;
}
经与ibm工程师联系，给出的回答是：
Each document opened in an agent allocates a private handle. When the document is closed by the agent, the handle is freed. Loops can be tricky. If the document isn't closed after processing, a handle will be allocated for every document processed in the loop.
This isn't a concern in small databases with few documents processed, but in larger databases, it can become an issue.
之后在designer帮助中，找到：
Java has no knowlege of the heavyweight back-end Domino Objects, only the lightweight Java objects representing them. Garbage collection has no effect on Domino Objects unless you first explicitly recycle them.
从而确定，出现的问题是由于没有及时释放domino后台对象造成的。对代码做了如下：
View docView = config.app_db.getView("ALLDOC");
Document middleDoc;
Document curDoc = docView.getFirstDocument();
Vector cal = new Vector();
while (curDoc != null){
middleDoc = docView.getNextDocument(curDoc);
cal = session.evaluate(config.arc_delete_fomular, curDoc);
if (cal.get(0).toString().equals("1.0")){
correspond += 1;
}
curDoc.recycle();
curDoc = null;
curDoc = middleDoc;
middleDoc = null;
if (correspond >= config.maxArchive) break;
}
再执行代理，后台已无错误。
可以得出结论，对于domino的java代理而言，当目标对象是大数据库对象并执行循环时，仅仅在代理的最后对session进行recycle是不够的，在循环中要注意及时的释放资源。
