java常见bug

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

无法解析menuId 字段，是指这个字段有错

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，容器处理中的错误

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，点击Apply，再点击OK

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

数据库连接断了

关闭不了弹出页面，查看οnsubmit="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
关闭所有的java进程

 

 ORA-00904: "EXCDETAILID": invalid identifier

这个字段不存在,或者表名就是错误的