急！５０３报错，如果能帮忙解决，以业务作报答。

请问哪位高手可以解决目前我们公司网站的疑问，目前网站一直不稳定，偶尔会报503服务暂时不可用的报错。供应商一直没有办法解决。还说可能不是程序或tomcat-apache配置上的问题，你们怎么看？ 

所以我不得不自己想办法，如果你或你的公司可以帮忙解决，以后我会考虑有业务给你们做，以作为答谢。我自己看了tomcat的日志代码和apache的访问日志，以下是两段日志记录，我们不知道是不是错误的记录。请过目，如果还想了解更多信息，也请提出。请尽快能答复我。十分感谢！ 


我们的系统是tomcat+apache+win2003svr 

Apache log: 
220.181.56.2 - - [26/Dec/2007:17:23:11 +0800] "GET /product/images/product_title_06_1.jpg HTTP/1.1" 200 503 "http://www.fa.omron.com.cn/product/ProductClass.jsp" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; MAXTHON 2.0)" 


Tomcat log: 
2007-12-26 17:10:24 StandardWrapperValve[jsp]: Servlet.service() for servlet jsp threw exception 
java.lang.OutOfMemoryError: Java heap space 
at com.mysql.jdbc.Buffer.getBytes(Buffer.java:198) 
at com.mysql.jdbc.Buffer.readLenByteArray(Buffer.java:318) 
at com.mysql.jdbc.MysqlIO.nextRow(MysqlIO.java:1366) 
at com.mysql.jdbc.MysqlIO.readSingleRowSet(MysqlIO.java:2333) 
at com.mysql.jdbc.MysqlIO.getResultSet(MysqlIO.java:435) 
at com.mysql.jdbc.MysqlIO.readResultsForQueryOrUpdate(MysqlIO.java:2040) 
at com.mysql.jdbc.MysqlIO.readAllResults(MysqlIO.java:1443) 
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1777) 
at com.mysql.jdbc.Connection.execSQL(Connection.java:3243) 
at com.mysql.jdbc.Connection.execSQL(Connection.java:3172) 
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1197) 
at com.mysql.jdbc.Connection.buildCollationMapping(Connection.java:1667) 
at com.mysql.jdbc.Connection.initializePropsFromServer(Connection.java:4017) 
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2906) 
at com.mysql.jdbc.Connection. <init> (Connection.java:1553) 
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:266) 
at src.manage.db.DBManager. <init> (DBManager.java:50) 
at org.apache.jsp.support.Q_0026ADetail_jsp._jspService(Q_0026ADetail_jsp.java:74) 
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324) 
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) 
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) 
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) 
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) 
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) 
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) 
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) 
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) 
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) 
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)