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https://issues.apache.org/jira/browse/AMQ-4994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13884257#comment-13884257
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Hadrian Zbarcea commented on AMQ-4994:
--------------------------------------

Zak, go for it, thanks.
One suggestion: what if instead of using one "page" parameter in URL you'd use 
two "from" and "to" parameters to specify the message range explicitly? It's 
semantically equivalent. On the page you can still display pages with a little 
bit of arithmetic in js.

> Web Console - java.lang.OutOfMemoryError: Java heap space - while browsing 
> deep queues
> --------------------------------------------------------------------------------------
>
>                 Key: AMQ-4994
>                 URL: https://issues.apache.org/jira/browse/AMQ-4994
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.9.0
>            Reporter: Dejan Bosanac
>            Priority: Blocker
>
> When browsing a deep queue with large number of messages, broker throws 
> {code}java.lang.OutOfMemoryError: Java heap space
>       at java.util.Arrays.copyOf(Arrays.java:2367)
>       at java.io.CharArrayWriter.write(CharArrayWriter.java:105)
>       at java.io.PrintWriter.write(PrintWriter.java:426)
>       at 
> com.opensymphony.module.sitemesh.filter.RoutablePrintWriter.write(RoutablePrintWriter.java:144)
>       at 
> org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:181)
>       at org.apache.jasper.runtime.JspWriterImpl.write(JspWriterImpl.java:412)
>       at 
> org.apache.taglibs.standard.tag.common.core.OutSupport.writeEscapedXml(OutSupport.java:239)
>       at 
> org.apache.taglibs.standard.tag.common.core.OutSupport.out(OutSupport.java:208)
>       at 
> org.apache.taglibs.standard.tag.common.core.OutSupport.doStartTag(OutSupport.java:128)
>       at 
> org.apache.jsp.browse_jsp._jspx_meth_c_out_6(org.apache.jsp.browse_jsp:323)
>       at org.apache.jsp.browse_jsp.access$8(org.apache.jsp.browse_jsp:314)
>       at 
> org.apache.jsp.browse_jsp$browse_jspHelper.invoke0(org.apache.jsp.browse_jsp:426)
>       at 
> org.apache.jsp.browse_jsp$browse_jspHelper.invoke(org.apache.jsp.browse_jsp:450)
>       at 
> org.apache.jsp.tag.web.jms.forEachMessage_tag.doTag(org.apache.jsp.tag.web.jms.forEachMessage_tag:89)
>       at 
> org.apache.jsp.browse_jsp._jspx_meth_jms_forEachMessage_0(org.apache.jsp.browse_jsp:170)
>       at org.apache.jsp.browse_jsp._jspService(org.apache.jsp.browse_jsp:100)
>       at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:109)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
>       at 
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:389)
>       at 
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:486)
>       at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:380)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
>       at 
> org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652)
>       at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1320)
>       at 
> org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
>       at 
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
>       at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
>       at org.apache.activemq.web.SessionFilter.doFilter(SessionFilter.java:45)
>       at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
>       at 
> org.apache.activemq.web.filter.ApplicationContextFilter.doFilter(ApplicationContextFilter.java:102)
>       at 
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1291)
>       at 
> com.opensymphony.sitemesh.webapp.SiteMeshFilter.obtainContent(SiteMeshFilter.java:129){code}
> when trying to browse that queue.
> To reproduce it:
> 1. Start a broker with default configuration
> 2. Send 200k messages with
> {code}ant producer -Dmax=200000 -Ddurable=true -Dsubject=TEST{code}
> 3. Try to browse the queue
> http://localhost:8161/admin/browse.jsp?JMSDestination=TEST
> The proper solution to this problem is to implement proper pagination while 
> browsing the messages, so users can browse through all messages showing 100 
> msgs (or so) at the time and not using all the available memory.



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