Hi, could you elaborate? Will a matching mod_jk update be needed? -Mitch
-----Original Message----- From: Takayuki Kaneko [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 16, 2007 3:45 AM To: Tomcat Developers List Subject: Re: is there a hard coded size limit to mod_jk response headers? Hi Yuri, You will be able to configure the packetSize at standard coyote AJP Jk handler on Tomcat 5.5.21. http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/webapps/docs/chang elog.xml?r1=483339&r2=485795&diff_format=h -Takayuki On 1/14/07, Yuri de Wit <[EMAIL PROTECTED]> wrote: > I am getting a buffer overflow while using my webapp deployed to > Apache2, mod_jk1.2 and Tomcat5.5.17. > > I am basically trying to send an HTTP response back to the browser > with a custom json header (X-JSON header) containing more than 8Kb > since this is the default way to send json state back to the browser > using Prototype.js. > > My basic question is this: is there a hard-coded limit of 8Kb for HTTP > response headers? > > If the answer is yes I could see this being a serious problem in a > world of AJAX where we not only want to send a XHTML snipped back to > the browser in the entity body, but also piggyback additional state in > the response. > > I browsed the source code for Tomcat5.5.17 and found out that AJP13 > sends 8Kb packets back to apachelib-mod_jk. For the response entity > body any number of 8Kb packets are sent, but for the response entity > header it seems that always only one 8Kb packet is sent. > > I also found a post to this mailing list that although asked a similar > question, did end up providing a definite answer aside from how to > better log the problem > (http://www.mail-archive.com/tomcat-dev@jakarta.apache.org/msg73387.html ). > > > And this is the exception I am seeing: > ------------------------------------------------------------------------ -------------- > Jan 4, 2007 9:08:11 PM org.apache.jk.common.MsgAjp cpBytes > SEVERE: Buffer overflow: buffer.len=8192 pos=25 data=215738 > Jan 4, 2007 9:08:11 PM org.apache.jk.common.MsgAjp cpBytes > SEVERE: Overflow > java.lang.Throwable > at org.apache.jk.common.MsgAjp.cpBytes(MsgAjp.java:172) > at org.apache.jk.common.MsgAjp.appendByteChunk(MsgAjp.java:146) > at org.apache.jk.common.MsgAjp.appendBytes(MsgAjp.java:132) > at org.apache.jk.common.JkInputStream.appendHead(JkInputStream.java:302) > at org.apache.jk.core.MsgContext.action(MsgContext.java:258) > at org.apache.coyote.Response.action(Response.java:182) > at org.apache.coyote.Response.sendHeaders(Response.java:378) > at org.apache.jk.common.JkInputStream.doWrite(JkInputStream.java:126) > at org.apache.coyote.Response.doWrite(Response.java:559) > at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.j ava:361) > at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:433) > at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:314 ) > at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:278) > at org.apache.catalina.connector.Response.finishResponse(Response.java:476) > at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1 51) > at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199) > at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282) > at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:754) > at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java: 684) > at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket. java:876) > at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool .java:684) > at java.lang.Thread.run(Thread.java:595) > ------------------------------------------------------------------------ -------------- > > thanks, > > -- yuri > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
