Threads are going to be renewed over time to try and avoid a probable memory leak.

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信息: Stopping service Catalina八月 21, 2014 8:48:45 下午 org.apache.catalina.loader.WebappClassLoader clearReferencesThreads严重: The web application [] 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.八月 21, 2014 8:48:45 下午 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks严重: The web application [] created a ThreadLocal with key of type [org.apache.http.client.utils.DateUtils$DateFormatHolder$1] (value [org.apache.http.client.utils.DateUtils$DateFormatHolder$1@c26f377]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@513a0fdc]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.八月 21, 2014 8:48:45 下午 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks严重: The web application [] created a ThreadLocal with key of type [org.apache.http.client.utils.DateUtils$DateFormatHolder$1] (value [org.apache.http.client.utils.DateUtils$DateFormatHolder$1@c26f377]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@3ae75e2d]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.八月 21, 2014 8:48:45 下午 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks严重: The web application [] created a ThreadLocal with key of type [org.apache.http.client.utils.DateUtils$DateFormatHolder$1] (value [org.apache.http.client.utils.DateUtils$DateFormatHolder$1@c26f377]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@2bd7fa91]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.八月 21, 2014 8:48:45 下午 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks严重: The web application [] created a ThreadLocal with key of type [org.apache.http.client.utils.DateUtils$DateFormatHolder$1] (value [org.apache.http.client.utils.DateUtils$DateFormatHolder$1@c26f377]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@70835c13]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.八月 21, 2014 8:48:45 下午 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks严重: The web application [] created a ThreadLocal with key of type [org.apache.http.client.utils.DateUtils$DateFormatHolder$1] (value [org.apache.http.client.utils.DateUtils$DateFormatHolder$1@c26f377]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@40121d1a]) but failed to remove it when the web application was stopped. Threads are going to be renewed over time to try and avoid a probable memory leak.八月 21, 2014 8:48:45 下午 org.apache.catalina.loader.WebappClassLoader checkThreadLocalMapForLeaks严重: The web application [] created a ThreadLocal with key of type [org.apache.http.client.utils.DateUtils$DateFormatHolder$1] (value [org.apache.http.client.utils.DateUtils$DateFormatHolder$1@c26f377]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@6534b6d2]) 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.
环境:
tomcat 7.0.55
ubuntu 14.04 LTS
mysql 5.5.38
jvm 1.7.0_67
connector/j mysql-connector-java-5.1.29-bin
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