请问这是什么异常?为什么数据显示三条

来源:2-5 核心控制器

慕函数4495222

2020-03-13 23:43:57

13-Mar-2020 23:41:06.331 璀﹀憡 [RMI TCP Connection(10)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc Web搴旂敤绋嬪簭 [ROOT] 娉ㄥ唽浜咼DBC椹卞姩绋嬪簭 [com.mysql.jdbc.Driver]锛屼絾鍦╓eb搴旂敤绋嬪簭鍋滄鏃舵棤娉曟敞閿�瀹冦�� 涓洪槻姝㈠唴瀛樻硠婕忥紝JDBC椹卞姩绋嬪簭宸茶寮哄埗鍙栨秷娉ㄥ唽銆�

13-Mar-2020 23:41:06.331 璀﹀憡 [RMI TCP Connection(10)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesJdbc Web搴旂敤绋嬪簭 [ROOT] 娉ㄥ唽浜咼DBC椹卞姩绋嬪簭 [org.apache.ibatis.datasource.unpooled.UnpooledDataSource.DriverProxy]锛屼絾鍦╓eb搴旂敤绋嬪簭鍋滄鏃舵棤娉曟敞閿�瀹冦�� 涓洪槻姝㈠唴瀛樻硠婕忥紝JDBC椹卞姩绋嬪簭宸茶寮哄埗鍙栨秷娉ㄥ唽銆�

13-Mar-2020 23:41:06.332 璀﹀憡 [RMI TCP Connection(10)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] 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:64)

 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

 java.lang.Thread.run(Thread.java:748)

13-Mar-2020 23:41:06.986 淇℃伅 [RMI TCP Connection(10)-127.0.0.1] org.apache.jasper.servlet.TldScanner.scanJars 鑷冲皯鏈変竴涓狫AR琚壂鎻忕敤浜嶵LD浣嗗皻鏈寘鍚玊LD銆� 涓烘璁板綍鍣ㄥ惎鐢ㄨ皟璇曟棩蹇楄褰曪紝浠ヨ幏鍙栧凡鎵弿浣嗘湭鍦ㄥ叾涓壘鍒癟LD鐨勫畬鏁碕AR鍒楄〃銆� 鍦ㄦ壂鎻忔湡闂磋烦杩囦笉闇�瑕佺殑JAR鍙互缂╃煭鍚姩鏃堕棿鍜孞SP缂栬瘧鏃堕棿銆�

[2020-03-13 11:41:07,507] Artifact icakepro:war exploded: Artifact is deployed successfully

[2020-03-13 11:41:07,507] Artifact icakepro:war exploded: Deploy took 1,210 milliseconds

13-Mar-2020 23:41:10.343 淇℃伅 [Abandoned connection cleanup thread] org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.

java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load []. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.

at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1385)

at org.apache.catalina.loader.WebappClassLoaderBase.getResource(WebappClassLoaderBase.java:1038)

at com.mysql.jdbc.AbandonedConnectionCleanupThread.checkContextClassLoaders(AbandonedConnectionCleanupThread.java:90)

at com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:63)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.http://img.mukewang.com/climg/5e6baa3c097364aa15720481.jpg$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:748)


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好帮手慕阿莹

2020-03-14

1、请同学贴一下分类管理页面的jsp代码

2、请同学贴一下查找分类的后台相关代码,老师帮你看一下,

3、同学可以先输出一下查询出来的所有分类。把打印的结果也贴一下

祝学习愉快。

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