catalina.out 中的这些警告是什么? [英] What are these warnings in catalina.out?

问题描述

我在 Tomcat 7 中有一个 Web 应用程序.
当我关闭 Tomcat 时，我看到这些警告(但并非总是如此)

I have a web application in Tomcat 7.
When I shut down Tomcat I see these warning (but not always)

SEVERE: The web application [/MyApplication] created a ThreadLocal
with key of type
[org.apache.xml.security.algorithms.MessageDigestAlgorithm$1] (value
[org.apache.xml.security.algorithms.MessageDigestAlgorithm$1@2e2c2e2c])
and a value of type [java.util.HashMap] (value
[{http://www.w3.org/2000/09/xmldsig#sha1=MESSAGE DIGEST SHA-1}]) 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.
Apr 3, 2012 1:56:19 PM org.apache.catalina.loader.WebappClassLoader
checkThreadLocalMapForLeaks   SEVERE: The web application
[/MyApplication] created a ThreadLocal with key of type
[com.sun.xml.bind.v2.ClassFactory$1] (value
[com.sun.xml.bind.v2.ClassFactory$1@25442544]) and a value of type
[java.util.WeakHashMap] (value [{class
com.classes.internal.ContactType=java.lang.ref.WeakReference@17eb17eb,
class
javax.xml.bind.annotation.adapters.HexBinaryAdapter=java.lang.ref.WeakReference@178a178a,
class
com.classes.internal.xjc.ListType=java.lang.ref.WeakReference@181c181c,
class
com.classes.internal.xjc.MessageType=java.lang.ref.WeakReference@17711771,
class
com.classes.internal.xjc.MessageType=java.lang.ref.WeakReference@17011701}])
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.   Apr 3, 2012 1:56:19 PM
org.apache.catalina.loader.WebappClassLoader
checkThreadLocalMapForLeaks   SEVERE: The web application
[/MyApplication] created a ThreadLocal with key of type
[org.apache.xml.security.utils.UnsyncBufferedOutputStream$1] (value
[org.apache.xml.security.utils.UnsyncBufferedOutputStream$1@4a904a90])
and a value of type [byte[]] (value [[B@67486748]) 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.  

关闭时 catalina.out 中的这些警告是什么意思?
我看到我提到的一些 JAXB 类，但不知道这里有什么问题.

What do these warnings mean in catalina.out on shutdown?
I see some of my JAXB classes mentioned, but can't tell what the issue is here.

有什么帮助吗?

推荐答案

您的应用程序中存在一个或多个内存泄漏.有关为什么会发生这些问题的完整解释，哪些是您的错以及您可以采取哪些措施来解决这些问题，请参阅此演示文稿:http://people.apache.org/~markt/presentations/2010-11-04-Memory-Leaks-60mins.pdf

You have one or more memory leaks in your application. For a full explanation of why these occur, which ones are your fault and what you can do to fix them see this presentation: http://people.apache.org/~markt/presentations/2010-11-04-Memory-Leaks-60mins.pdf

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