java.net.SocketException when user disconnects from response stream

Bill Barker

2005-03-05 20:22:17 UTC

Urm, the entire point of ClientAbortException (which is a Tomcat class) is
to allow Tomcat to know that it shouldn't be logging it. If
com.lowagie.text.pdf chooses to log it, well you'll have to take it up with
them ;-).

"Allistair Crossley" <***@QAS.com> wrote in message news:***@orion.qas.com...
Hi,

I've seen similar posts from users before on this topic but do not believe I
saw a concrete answer. I was streaming a PDF to my browser yesterday when I
decided to quickly move to another page in the website and therefore
stopping the PDF response stream. When I looked in the logs, I found the
following stack trace.

The com.lowagie.text.pdf has spotted that this was a Client Abort which it
was, but I also noted that it is wrapping up the real error that occured
which was a java.net.SocketException: Connection reset by peer: socket
write.
We have this java.net.SocketException: Connection reset by peer: socket
write error in our logs quite often on our production server and I am
"guessing" that perhaps users are stopping the response stream somehow,
perhaps closing the browser or moving to another page mid-response?

In both that case, and in the case of aborting the PDF stream as below, I am
not convinced I need to care since it does not impair the server that a user
did not bother to receive the full response.

Does anyone disagree or have an explanation why such scary stack traces
should be output by Tomcat each time a user does not complete receiving
their response .. is it perhaps because Tomcat is unable to differentiate
between a user closing their browser and some other network problem that I
may well want to know about?

Thanks, Allistair.

ExceptionConverter: ClientAbortException: java.net.SocketException:
Connection reset by peer: socket write error
at
org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:366)
at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:403)
at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:314)
at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:293)
at
org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:85)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:124)
at com.lowagie.text.pdf.OutputStreamCounter.flush(Unknown Source)
at com.lowagie.text.DocWriter.close(Unknown Source)
at com.lowagie.text.pdf.PdfWriter.close(Unknown Source)
at com.lowagie.text.pdf.PdfDocument.close(Unknown Source)
at com.lowagie.text.Document.close(Unknown Source)
at
net.sf.jasperreports.engine.export.JRPdfExporter.exportReportToStream(JRPdfExporter.java:457)
at
net.sf.jasperreports.engine.export.JRPdfExporter.exportReport(JRPdfExporter.java:282)
at
net.sf.jasperreports.engine.JasperExportManager.exportReportToPdfStream(JasperExportManager.java:174)
at
net.sf.jasperreports.engine.JasperPrintManager.printReportToPdfStream(JasperPrintManager.java:145)
at
net.sf.jasperreports.engine.JasperRunManager.runReportToPdfStream(JasperRunManager.java:269)
at
com.qas.newmedia.intranet.pof.actions.mypos.PDFGenerateAction.doWork(PDFGenerateAction.java:155)
at
com.qas.newmedia.intranet.iq.actions.SecuredBaseAction.execute(SecuredBaseAction.java:188)
at
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1158)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
com.qas.newmedia.common.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:65)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:526)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:305)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:383)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:745)
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:675)
at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:868)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)

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