当从Tomcat中取消部署应用程序时,线程仍处于打开状态。Tomcat + TomcatJDBC ServletContextListener打开线程
org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/services] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak.
org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
SEVERE: The web application [/services] appears to have started a thread named [Timer-0] but has failed to stop it. This is very likely to create a memory leak.
应用程序维护地图数据源并运行ScheduledExecutorService的更新地图每5分钟。使用TomcatJDBC以下参数创建
@WebListener
public class DataSourceFactory implements ServletContextListener
{
private static Map<String, DataSource> rdsDataSourceMap;
private static ScheduledExecutorService scheduler;
private static final long CONNECTION_MAP_REFRESH_INTERVAL = 5;
@Override
public void contextInitialized(ServletContextEvent event)
{
scheduler = Executors.newSingleThreadScheduledExecutor();
scheduler.scheduleAtFixedRate(new Runnable(){
@Override
public void run() {
cacheDatasourceMap();
}
}, 0, CONNECTION_MAP_REFRESH_INTERVAL, TimeUnit.MINUTES);
}
@Override
public void contextDestroyed(ServletContextEvent event)
{
scheduler.shutdownNow();
if (localPool != null) {
localPool.close();
}
for (DataSource ds : rdsDataSourceMap.values()) {
if (ds != null) {
ds.close();
}
}
}
private void cacheDatasourceMap()
{
...
}
....
}
的数据源:
driver=com.mysql.jdbc.Driver
jmxEnabled=true
testWhileIdle=true
testOnBorrow=true
validationQuery=SELECT 1
testOnReturn=false
validationInterval=30000
timeBetweenEvictionRunsMillis=5000
maxActive=100
maxIdle=20
initialSize=10
maxWait=100000
removeAbandonedTimeout=60
minEvictableIdleTimeMillis=30000
minIdle=10
logAbandoned=true
removeAbandoned=true
jdbcInterceptors=org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer;org.apache.tomcat.jdbc.pool.interceptor.ResetAbandonedTimer;org.apache.tomcat.jdbc.pool.interceptor.SlowQueryReportJmx(threshold=10000)
UPDATE
摆脱ScheduledExecutorService
的我仍然看到了计时器线程后保持打开。我在contextDestroyed()
的末尾添加了一条日志语句,并验证它正在通过关闭DataSources。
我也证实了Tomcat的lib中的MySQL驱动程序并没有在WAR中。