Hi list,
We are using tomcat with Railo to use CFML and getting an strange issue..
When we try to upload a file of 2~4MB on a slow connection 15~20kb/s the
request is completed but all of the form fields are dropped.. which causes
an error..
How to reproduce the error with a small CFM code:
// form_upload.cfm
<form name="form1" action="upload.cfm" method="post"
enctype="multipart/form-data">
File: <input type="file" name="fileData">
<input type="submit">
</form>
//upload.cfm
<cfsetting requesttimeout="36000" />
<cffile
action="upload"
filefield="form.fileData"
destination="#application.tempDir#"
nameconflict="makeunique" />
<cfdump var="#cffile#">
This only happens with large files and/or slow connection.
Here is some information about the test environment:
- Railo 3.2.0.001 rc
- OS Linux (2.6.18-164.15.1.el5) => CentOS 5.4
- Servlet Container Apache Tomcat/6.0.20 and also tested with Apache
Tomcat/6.0.29
the tomcat configuration doesn't has many changes, and it seems not have any
change that would affect this behavior.
tomcat's server.xml
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
tomcat's web.xml (timeout="30 minutes")
<session-config>
<session-timeout>30</session-timeout>
</session-config>
apache-tomcat workers.properties
type=ajp13
socket_timeout=300
So what is important to notice:
1) socket_timeout just kill "inactive" connections, in other words,
connections with 5 minutes without any activity.
The error occurs even for upload minor that 5 minutes (socket_timeout)
and longer than 50 seconds (Railo's default request timeout), like a 2
minutes upload.
2) anyway, we commented this parameter (to infinity) and the same error
occurred
3) We create a simple simple CFM file that just (a) sleep a couple of
seconds and (b) print a Ticket Count and it ran for more than one hour, user
<cfsetting requesttimeout="36000">
This test runs fine, that makes me deduce the issue occurs only when I
have a <cffile action="upload"> in the template
In other words: A normal CFM request runs for so long, fine. An upload,
not.
4) Backing to upload issue: I's important to note the request finishes
perfectly.
In other words: Railo continues processing this request after the
upload.
The problem is, in that case, the form scope/variables is empty and
Railo raises an error saying "form field [form.my_upload_field] is not a
file field"
We also put a <cfdump var="#form#"> before the <cffile> tag, it outputs
empty.
In other words: Any form field is sent.
5) This issue only occurs for long uploads.
If I execute the same upload, for the same file, in a fast connection,
it works fine.
The error only occurs on slow connections and larger files.
Once slow connections is so common in Brazil, we can't upload larger
files, and I mean as "larger files", files with a few MegaBytes of size.
To reproduce this issues you'll need to simulate a slower connections.
Some thing like 5-10KB/s (64-128 bit/s).
In many cases it's normal in Brazil, specially when accessing
international sites or sites hosted abroad.
You can do it using the Firefox Add-on "Firefox Throttle"
(Download
here<http://www.uselessapplications.com/en/Application/FirefoxThrottle.aspx?src=0%3Affthrottle%3Aoptions>
).
Set a 10 KB/s link and upload a file with size of 3-5 Mb.
Our Railo default timeout (Railo Web Admin - "Application" - "Request
timeout") is set to 50 seconds
and you can use a <cfsetting requesttimeout="3600"> (1 hour) in your
CFML code for that upload test.
6) It seems the error only occurs for <cffile action="upload"> for slower
connections.
Import to note that the request is processed by Railo.
I can even process other CFML codes before the <cffile action="upload">
tag.
It seems that some internal procedure is subjected default request
timeout.
In other words: It seems some internal procedure/function is NOT
following the <cfsetting requesttimout> parameter.
The stacktrace:
form field [form.fileData] is not a file field
at railo.runtime.tag.FileTag.getFormItem(FileTag.java:833):833
at railo.runtime.tag.FileTag.actionUpload(FileTag.java:666):666
at railo.runtime.tag.FileTag.doStartTag(FileTag.java:299):299
at admin.tools.upload_cfm$cf.call(/wwwroot/app/admin/tools/upload.cfm:7):7
at railo.runtime.PageContextImpl.doInclude(PageContextImpl.java:763):763
at
railo.runtime.listener.ModernAppListener._onRequest(ModernAppListener.java:199):199
at
railo.runtime.listener.MixedAppListener.onRequest(MixedAppListener.java:23):23
at railo.runtime.PageContextImpl.execute(PageContextImpl.java:1972):1972
at
railo.runtime.engine.CFMLEngineImpl.serviceCFML(CFMLEngineImpl.java:280):280
at railo.loader.servlet.CFMLServlet.service(CFMLServlet.java:32):32
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717):717
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290):290
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206):206
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233):233
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191):191
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128):128
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102):102
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109):109
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293):293
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190):190
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291):291
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:769):769
at
org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:698):698
at
org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:891):891
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690):690
at java.lang.Thread.run(Thread.java:636):636
Also we try to
We isolated the issue trying to find out if the error occurs only with
Railo, so we tested with a small java upload application and didn't work as
well. We tried using directly tomcat with no mod_jk to redirect to port 80
in Apache, and no success.
We also try some configuration that a member of the Railo list posted:
<Connector
port="8888"
maxHttpHeaderSize="8192" <--- may be helpful
maxThreads="150"
minSpareThreads="25"
maxSpareThreads="75"
enableLookups="false"
redirectPort="8443"
acceptCount="100"
connectionTimeout="20000" <--- may be helpful
disableUploadTimeout="true" <--- may be helpful
/>
But no success.
Also, we try to set the disableUploadTimeout to false, as another user of
Railo List suggested.. No success too.
Anyone has been passed for something like that? We are stuck in this issue,
we believe that may be a tomcat issue..
Any help would be great..
Thank you.
--
Odilo Schwade Junior
http://br.linkedin.com/in/odilojunior
