Re: [jboss-user] empty servlet responses
Hi Stephen,
thanks for your tip, but the Axis client that handles the http connection aborts only on
-1.
The GC I cannot stop, but I monitored it via its logging and during that time there was
non.
Is there a way to see when that linux defragmenting process kicks in?
Andreas
Stephen Davidson wrote:
Hi Andreas.
This is just a WAG, but are you using InputStream to read your file? And/or are
you aborting when 0-bytes read? If so, I would change that to -1, as 0-bytes
can occur when the filesystem and/or JVM is busy. I could be off base here, but
a 'while (bytesRead <= 0)' would cause the symptoms you are seeing.
-Steve
PS> Two items you can not turn off on your platform;
- GC
- Kernel level file access -- linux has a background file process running to
reorg files to keep them from becoming fragmented.
Andreas Tschritter wrote:
>Hi,
>
>we are running an Axis 1.4 server app inside a JBoss 4.0.2 AS with
>basically everything disabled but the tomcat. It is quite simple, for
>every call it
>gets some XML from another app running on the same AS, adds the SOAP
>envelope and returns that.
>We test this app with a test client does very frequent requests.
>During the test runs from time to time we get an empty response from the
>server.
>When this happens, it often happens a small number of times during some
>seconds and then everything is ok again for one or more hours.
>On the server, with Axis logging set to debug and jboss/tomcat logging
>set to info, there are no errors and the requests during that time seem
>to work
>like all the others. Also, there is no garbage collection during that
>time. Only thing I've noticed is that the requests at that time take a
>bit longer.
>It also seems to happen less when logging is set to a low level and much
>logging output s produced.
>Only the Jboss + apps is running on that machine, nothing else, not even
>crons. Its a quad-core AMD64 with 8GB RAM running debian 4.0, the jboss
>VM has
>5GB heap assigned.
>Does anybody have an idea what could cause this or what we could do to
>find / fix the issue?
>
>thanks,
>
>Andreas Tschritter
>
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