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  • quartz集群报错but has failed to stop it. This is very likely to create a memory leak.

    quartz集群报错but has failed to stop it. This is very likely to create a memory leak.

    在一台配置1核2G内存的阿里云服务器上运行quartz;执行定时任务报如下异常,而在本地开发环境中则正常运行。

    
    10-Sep-2016 11:43:50.415 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [faxian] appears to have started a thread named [logback-1] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
     sun.misc.Unsafe.park(Native Method)
     java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
     java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
     java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
     java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
     java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
     java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
     java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
     java.lang.Thread.run(Thread.java:745)
    10-Sep-2016 11:43:50.415 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [faxian] 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. Stack trace of thread:
     java.lang.Object.wait(Native Method)
     java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
     com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)
    10-Sep-2016 11:43:50.416 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [faxian] appears to have started a thread named [clusterQuartzScheduler_Worker-1] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
     java.lang.Object.wait(Native Method)
     org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:568)
    10-Sep-2016 11:43:50.417 WARNING [localhost-startStop-1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [faxian] appears to have started a thread named [clusterQuartzScheduler_Worker-2] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
     java.lang.Object.wait(Native Method)
    

    根据异常,初步判断是内存溢出导致的问题。查看服务器内存使用情况

    
     [root@test-server logs]#  free -h
                  total       used       free     shared    buffers     cached
     Mem:          1.8G       1.7G       84M       9.4M       154M       520M
     -/+ buffers/cache:       1.1G       759M
     Swap:           0B         0B         0B
     
    

    于是查看quartz的配置

    
    <task:executor id="quartzTaskExecutor" keep-alive="900" pool-size="10" queue-capacity="20" />
    
    

    pool-size="10",queue-capacity="20"。

    然而根据实际情况并,连接池数量和容量并不需要这么大。改成pool-size="1"queue-capacity="1",再次启动不再报错。

    查看服务器内存使用情况

    
    [root@test-server logs]#  free -h
                 total       used       free     shared    buffers     cached
    Mem:          1.8G       1.7G       141M       9.3M       154M       422M
    -/+ buffers/cache:       1.1G       718M
    Swap:           0B         0B         0B
    
    
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  • 原文地址:https://www.cnblogs.com/rwxwsblog/p/5896449.html
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