[英]How to resolve tomcat memory leak warning - The web application have started a thread but has failed to stop it
I am using com.ning.async-http-client(1.9.40) library to post asynchronous request.我正在使用 com.ning.async-http-client(1.9.40) 库来发布异步请求。 While shutting down tomcat, I am getting below messages in catalina.out log :-在关闭 tomcat 时,我在 catalina.out 日志中收到以下消息:-
SEVERE: The web application [/xyz] appears to have started a thread named [Hashed wheel timer #1] but has failed to stop it. This is very likely to create a memory leak.
Jul 03, 2017 1:27:15 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
SEVERE: The web application [/xyz] appears to have started a thread named [New I/O worker #1] but has failed to stop it. This is very likely to create a memory leak.
Jul 03, 2017 1:27:15 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
SEVERE: The web application [/xyz] appears to have started a thread named [New I/O worker #2] but has failed to stop it. This is very likely to create a memory leak.
Jul 03, 2017 1:27:15 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
SEVERE: The web application [/xyz] appears to have started a thread named [New I/O boss #3] but has failed to stop it. This is very likely to create a memory leak.
Jul 03, 2017 1:27:15 PM org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
SEVERE: The web application [/xyz] appears to have started a thread named [Hashed wheel timer #2] but has failed to stop it. This is very likely to create a memory leak.**
The state of these threads are:这些线程的状态是:
"New I/O boss #3" prio=10 tid=0x00007ff3a00f9000 nid=0x17a9 runnable [0x00007ff3878f7000]
"New I/O worker #2" daemon prio=10 tid=0x00007ff3a00aa800 nid=0x17a8 runnable [0x00007ff3879f8000]
"New I/O worker #1" daemon prio=10 tid=0x00007ff3a00b8800 nid=0x17a7 runnable [0x00007ff387af9000]
"Hashed wheel timer #2" prio=10 tid=0x00007ff3a020e800 nid=0x17aa waiting on condition [0x00007ff3875f0000]
"Hashed wheel timer #1" prio=10 tid=0x00007ff3a0083000 nid=0x17a6 sleeping[0x00007ff387bfa000]
Please suggest a way to stop these threads from application.请提出一种从应用程序中停止这些线程的方法。
The AsyncHttpClient
implements Closeable
. AsyncHttpClient
实现Closeable
。 It suffices to call close()
on it when your application shuts down.当您的应用程序关闭时,调用close()
就足够了。
This will clean up the resources used by AsyncHttpClient
.这将清理AsyncHttpClient
使用的资源。
To illustrate :举例说明:
public static void main(String[] args) throws Exception {
AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
Future<Response> f = asyncHttpClient.prepareGet("http://www.google.com/").execute();
Response r = f.get();
asyncHttpClient.close(); // when this is commented out, the application won't exit, as the non daemon threads prevent it.
}
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