xmlbeans 2.6.0.jar导致的内存泄漏

Question

我正在尝试做一个项目，为我包含的xmlbeans 2.6.0.jar创建xlsx文件。当我尝试重新启动glassfish时，我得到了以下错误。请任何人来解决这个问题，并帮助我

Error:
Severe:   The web application [/test] created a ThreadLocal with
key of type [org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1]  
(value  
[org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1@4f7c1b38]) and 
a value of type [java.util.ArrayList] (value
[[java.lang.ref.SoftReference@51ec7f5b]]) but failed to remove it when 
the web application was stopped. Threads are going to be renewed over 
time to try and avoid a probable memory leak.

Severe:   The web application [/test] created a ThreadLocal with 
key of type [org.apache.xmlbeans.impl.store.Locale$1] (value 
[org.apache.xmlbeans.impl.store.Locale$1@736da929]) and a value of 
type [java.lang.ref.SoftReference] (value 
[java.lang.ref.SoftReference@60681b99]) but failed to remove it when 
the web application was stopped. Threads are going to be renewed over 
time to try and avoid a probable memory leak.

Severe:   The web application [/test] created a ThreadLocal with 
key of type [org.apache.xmlbeans.XmlBeans$1] (value 
[org.apache.xmlbeans.XmlBeans$1@4fe26977]) and a value of type 
[java.lang.ref.SoftReference] (value 
[java.lang.ref.SoftReference@7d46d177]) but failed to remove it when 
the web application was stopped. Threads are going to be renewed over 
time to try and avoid a probable memory leak.

Answer 1

这是a known issue of XML Beans库。

你可以试试Jochen Kemnade的建议：

作为一种变通方法，我将POI转换移动到一个专用的线程池中，当我的webapp上下文被破坏时，我将其关闭。这样，所有的泄漏都会随池一起下降，而Tomcat的处理程序线程会保持干净

在Executor中完成工作，然后去掉它。

Answer 2

自XMLBeans 3.1.0 (从Apache POI 4.1.0开始包含)以来，有一种方法可用于手动清除当前线程中XMLBeans中的所有线程本地变量：

org.apache.xmlbeans.ThreadLocalUtil.clearAllThreadLocals()

请参阅https://issues.apache.org/jira/browse/XMLBEANS-502和http://xmlbeans.apache.org/status.html