- From: Anders Meyer <Anders_Meyer@pol.dk>
- Date: Tue, 9 Nov 1999 16:34:28 +0100
- To: "'Yves Lafon'" <ylafon@w3.org>, Anders Meyer </O=POLITIKENS.HUS/OU=POLHUS-EXCH/CN=RECIPIENTS/CN=Anders.Meyer@pol.dk>
- Cc: Jigsaw Mailing List <www-jigsaw@w3.org>
Hi again!
After upgrading AIX the problem disappeared! - scary.
Regards
Anders Meyer
-----Oprindelig meddelelse-----
Fra: Yves Lafon [SMTP:ylafon@w3.org]
Sendt: 8. november 1999 18:18
Til: Anders Meyer
Cc: Jigsaw Mailing List
Emne: Re: Something is using all CPU-time
On Thu, 4 Nov 1999, Anders Meyer wrote:
> Hi there!
>
> I have got a problem with my system. I am running jigsaw - the only
> application running is a servlet. When we have a heavi load the the java
> process suddenly starts to use a lot of CPU time. Everything is running
> fine - but slow!
>
> I made some thead dumps - it revealed 2 threads (in suspended mode) "stuck"
> in the servlet. Has anyone got i good idea how to solve this?
> The threads stuck looks similar to this:
>
> java.net.SocketInputStream.read(Compiled Code)
> java.net.SocketInputStream.read(Compiled Code)
> java.io.InputStreamReader.fill(Compiled Code)
> java.io.InputStreamReader.read(Compiled Code)
> java.io.BufferedReader.fill(Compiled Code)
> java.io.BufferedReader.read(Compiled Code)
> com.Polinfo.Polinfo.sendBrsCmd(Compiled Code)
>
> Could this be a problem running jdk 1.1.6 on AIX?
You can add timeouts if it is related to socket streams, you will be
notified then if there is a problem on the socket (stuck connection).
Also check that you detect well the end of connection (-1 on the stream or
IO error), then, verify that the jdk itself is not the culprit (ie: bad
detection of EOF in some cases)
Hope this helps
/\ - Yves Lafon - World Wide Web Consortium -
/\ / \ Architecture Domain - Jigsaw Activity Leader
/ \ \/\
/ \ / \ http://www.w3.org/People/Lafon - ylafon@w3.org
Received on Tuesday, 9 November 1999 10:39:04 UTC