jsp 在线预览图片 tomcat 内存溢出

0 0

jsp 在线预览图片 tomcat 内存溢出5

用jsp 做了一个图片预览功能，图片用servlet进行调用，在多个客户端同时访问的时候，tomcat 报内存溢出。以下是报的错误。2012-8-25 0:04:43 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet showImage threw exception
java.lang.OutOfMemoryError
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:198)
at com.test.ShowImageServlet.doGet(ShowImageServlet.java:43)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.anychart.servlet.ResourceFilter.doFilter(ResourceFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)

以下是源码
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
FileInputStream hFile = null;
OutputStream toClient = null;
try{

String fileid= request.getParameter("fileid");
FaxFile ff = FaxService.getFaxFileById(fileid);

Xml xml = new Xml();
String path = xml.getKeyValue().get("path").toString();//存放文件的路径
String saveName = ff.getSaveName();
String newPath = path+saveName;
//FileInputStream
hFile = new FileInputStream(newPath); // 以byte流的方式打开文件 d:\1.gif
int i=hFile.available(); //得到文件大小
byte data[]=new byte[i];
hFile.read(data); //读数据
hFile.close();
response.setContentType("image/*"); //设置返回的文件类型
toClient=response.getOutputStream(); //得到向客户端输出二进制数据的对象
toClient.write(data); //输出数据
toClient.close();
}
catch(Exception e) //错误处理
{
e.printStackTrace();
System.out.println("图片显示失败了");
// PrintWriter toClient = response.getWriter(); //得到向客户端输出文本的对象
// response.setContentType("text/html;charset=gb2312");
// toClient.write("无法打开图片!");
// toClient.close();
}finally{
if(hFile!=null){
try{
hFile.close();
}catch(Exception e){
e.printStackTrace();
}
}
if(toClient!=null){
try{
toClient.close();
}catch(Exception e){
e.printStackTrace();
}
}
}

}

---
不知道什么原因找了两天了还是报错

问题补充：这个java.lang.OutOfMemoryError 报的有的出乎意外 tomcat内存大小也进行设置了，做过一个测试，如果将服务器重启（注意不是tomcat）以后，同时访问的次数还能多点，如果直接重启tomcat，访问一会内存就溢出了，再访问一下tomcat直接退出了，很是郁闷，用JProfiler进行了一下跟踪，但是对JProfiler用的不熟悉，没有弄明白。

问题补充：tomcat 自动退出留下的
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (malloc) failed to allocate 551592 bytes for Chunk::new
# Possible reasons:
#   The system is out of physical RAM or swap space
#   In 32 bit mode, the process size limit was hit
# Possible solutions:
#   Reduce memory load on the system
#   Increase physical memory or swap space
#   Check if swap backing store is full
#   Use 64 bit Java on a 64 bit OS
#   Decrease Java heap size (-Xmx/-Xms)
#   Decrease number of Java threads
#   Decrease Java thread stack sizes (-Xss)
#   Set larger code cache with -XX:ReservedCodeCacheSize=
# This output file may be truncated or incomplete.
#
# Out of Memory Error (allocation.cpp:317), pid=256, tid=5812
#
# JRE version: 6.0_26-b03
# Java VM: Java HotSpot(TM) Server VM (20.1-b02 mixed mode windows-x86 )