[英]The web application appears to have started a thread named but has failed to stop it. This is very likely to create a memory leak
[英]How to resolve tomcat memory leak warning - The web application have started a thread but has failed to stop it
我正在使用 com.ning.async-http-client(1.9.40) 庫來發布異步請求。 在關閉 tomcat 時,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.**
這些線程的狀態是:
"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]
請提出一種從應用程序中停止這些線程的方法。
AsyncHttpClient
實現Closeable
。 當您的應用程序關閉時,調用close()
就足夠了。
這將清理AsyncHttpClient
使用的資源。
舉例說明:
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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