java常見bug

 org.hibernate.QueryException: could not resolve property: menuId of:

無法解析menuId 欄位，是指這個欄位有錯

Servlet.service() for servlet default threw exception
09:28:54,704 ERROR [CoyoteAdapter] An exception or error occurred in the container during the request processing
java.lang.OutOfMemoryError: PermGen space，容器處理中的錯誤

在myeclipse----windows-Preferences---myeclipse---Servers--JBoss--JBoss4.x---JDK--Optional java vm arguments中加入-Xms256m -Xmx512m -XX:MaxNewSize=256m -XX:MaxPermSize=256m，點擊Apply，再點擊OK

 SQL Error: 17002, SQLState: null
10:41:08,907 ERROR [JDBCExceptionReporter] Io 異常: Software caused connection abort: recv failed

資料庫連接斷了

關閉不了彈出頁面，查看onsubmit="return validateCallback(this, navTabAjaxDone);"
改成dialogAjaxDone

 

JBoss Web Services - Native
15:52:24,418 INFO  [NativeServerConfig] jbossws-3.0.1-native-2.0.4.GA (build=200803312044)
15:52:26,728 INFO  [Embedded] Catalina naming disabled
15:52:27,248 INFO  [AprLifecycleListener] The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: F:\Program Files\MyEclipse\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\bin
15:52:27,404 ERROR [Http11Protocol] Error initializing endpoint
java.net.BindException: Address already in use: JVM_Bind:8980
關閉所有的java進程

 

 ORA-00904: "EXCDETAILID": invalid identifier

這個欄位不存在,或者表名就是錯誤的