现在mysql真的不能提供一种机制来实时 Switching Masters during Failover吗？ 只能是编写脚本检测master状态，然后对slave server 来stop slave，reset master，然后change master to吗？ 这样岂不是在产品环境上要停应用，还要实时改下面的url？ jdbc:mysql://master,slave1,slave2,slave3 ... -> jdbc:mysql:// master,slave2,slave3 ... 谁可以提供一个解决方案？ [ 本帖最后由 ayalastrike 于 2008-7-14 10:24...
Error occurred during initialization of VM
java.lang.NoSuchMethodError: Method java.lang.System.nanoTime()J name or signature does not match
at java.lang.System.registerNatives(Native Method)
at java.lang.System.
checking for GL... configure: error: Package requirements (glproto >= 1.4.9 gl >= 7.1.0) were not met: No package 'gl' found Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables GL_CFLAGS and GL_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details. ...
我写了一个自定义validate的例子出现了下面的错误： Unhandled exception thrown during validation java.lang.NullPointerException at validator.myValidator.ValidationEqual.validateTwoFields(ValidationEqual.java:36) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl...
我写了一个自定义validate的例子出现了一下的例子 Unhandled exception thrown during validation java.lang.NullPointerException at validator.myValidator.ValidationEqual.validateTwoFields(ValidationEqu l.java:26) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. ava:39) at sun.reflect.Delega...
[root@oracle 9.2.0.4]# sh root.sh Running Oracle9 root.sh script... \nThe following environment variables are set as: ORACLE_OWNER= oracle ORACLE_HOME= /opt/oracle/product/9.2.0.4 Enter the full pathname of the local bin directory: [/usr/local/bin]: The file "dbhome" already exists in /usr/local/bin. Overwrite it? (y/n) [n]: y Copying dbhome to /usr/local/bin ... The file "oraenv" a...
5.05还没进入，弹出对话框： Console errors Sun Sep 8 04:01:42 2013 WARNING: Wdo :Error on fixed dev 1/42,block=3463,cmd=0X000000 Status=0X00005940,sector=258991,cylinder/head=1011/0 是何故障？
linux新手，gentoo，虚拟机。 可能因为某次非正常关机（或者其他什么的），每次启动的时候都会在/dev/sda3这里检查一番，但最后可以启动成功。 想用fsck修复，但是无法umount，因为它mount在/上。。。 在水木上问过，有人说fsck不需要umount，然后我试了下，会有一个看起来挺严重的警告： 我该做点什么，是用安装光盘启动，进行fsck修复吗？
The server error log can be a useful source of information about connection problems. See ...
转：许强 Python errors and Exceptions 1. python中的try{}catch{} 2. raise exception 3. try...except ... else.. 4. finally块 1. python中的try{}catch{} python中的异常处理的关键字和c#中的是不相同的，python中使用try，except关键在来处理异常，如下：[code]def dive(x, y): try: result = x / y; except ZeroDivisionError as z : print("division by zero.", z); else: ...
