java调用pg_dump备份postgre数据库问题
在项目中,用java调用pg_dump进行postgre数据库备份,在本地机上跑,可以正确运行,发布
到其他机器上之后,会在调用外部程序,进行备份的地方卡住,代码如下:
/**备份数据库**/
File workPath=fetchDBInstallPath();//获取数据库的pg_dump工具的目录
if(workPath==null){
return false;
}
String dbBackupPath=fetchDBBackupPath();
StringBuffer sb=new StringBuffer();
sb.append( cmd /c pg_dump -h 127.0.0.1 -p 5432 -U postgres -F c -b -v
-f ).append(dbBackupPath+ \\ +fileName+ .backup ).append( dbname );
log.info( ********************************************** );
log.info( workPath= +workPath); www.docin.com
log.info( command: +sb.toString());
log.info( ********************************************** );
Process
process=Runtime.getRuntime().exec(sb.toString(),null,workPath);
log.info( ~~~~~~~~~~~~~~~~~~~~~~~~~~~ );
StreamGobbler errorGobbler = new
StreamGobbler(process.getErrorStream(), Error ); //线程,用于输出外部程序的输
出内容,防止阻塞
StreamGobbler outputGobbler = new
StreamGobbler(process.getInputStream(), Output ); //线程,用于输出外部程序的输
出内容,防止阻塞
log.info( +++++++++++++++++++++++++++ );
errorGobbler.start();
outputGobbler.start();
process.waitFor();
if(process.exitValue()!=0){
return false;
} www.docin.com
从部署机器上的日志来看,运行完成了log.info( +++++++++++++++++++++++++++ );
之后,线程没有正确运行,也就是说,应该是外部程序被阻塞了,然后我把命令行中的-v参数
去掉,不让外部程序输出内容,可还是会阴塞,具体日志如下:
2012-10-12 10:23:43.551 INFO] **********************************************
2012-10-12 10:23:43.551 INFO] workPath=C:\Program
Files\hikvision\CMS\database\bin
2012-10-12 10:23:43.551 INFO] command:cmd /c pg_dump -h 127.0.0.1 -p 5432 -U
postgres -F c -b -v -f c:\backup\test.backup 5221cms
2012-10-12 10:23:43.551 INFO] **********************************************
2012-10-12 10:23:43.711 INFO] ~~~~~~~~~~~~~~~~~~~~~~~~~~~
2012-10-12 10:23:43.711 INFO] +++++++++++++++++++++++++++
------最佳解决方案--------------------------------------------------------
在命令前添加一行
www.docin.com
set PGPASSWORD= password
