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Posted to users@tomcat.apache.org by "Gurdeep Kaur (gurdeep)" <gu...@cisco.com> on 2007/03/21 00:56:04 UTC
high CPU usage with codenomicon TLS test case #91
We are using tomcat 5.5 with JSSE. When we execute codenomicon test case
#91 from the TLS suit, tomcat CPU usage goes up to 90%. The platform is
Redhat Linux.
Was wondering if someone has seen something like this before.
Thanks
Gurdeep
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RE: high CPU usage
Posted by "Gurdeep Kaur (gurdeep)" <gu...@cisco.com>.
Mark,
For some reason the previous TLS sessions are not getting closed, I see
so many TCP sessions in CLOSE_WAIT on port 8443.
Not sure why is that
Gurdeep
-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org]
Sent: Friday, March 23, 2007 3:46 PM
To: Tomcat Users List
Subject: Re: high CPU usage
Gurdeep Kaur (gurdeep) wrote:
> So why would tomcat create two threads for one tls session?
Because Tomcat receives two requests. You might want to start looking
more closely at what is going on at the network level.
Mark
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Re: high CPU usage
Posted by Mark Thomas <ma...@apache.org>.
Gurdeep Kaur (gurdeep) wrote:
> So why would tomcat create two threads for one tls session?
Because Tomcat receives two requests. You might want to start looking
more closely at what is going on at the network level.
Mark
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RE: high CPU usage
Posted by "Gurdeep Kaur (gurdeep)" <gu...@cisco.com>.
So why would tomcat create two threads for one tls session?
Gurdeep
-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org]
Sent: Thursday, March 22, 2007 4:31 PM
To: Tomcat Users List
Subject: Re: high CPU usage
Gurdeep Kaur (gurdeep) wrote:
> Mark,
>
> Just thinking some more, as to who actually invokes the threads? Is it
> Tomcat?
They look like Tomcat created threads to me.
Mark
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Re: high CPU usage
Posted by Mark Thomas <ma...@apache.org>.
Gurdeep Kaur (gurdeep) wrote:
> Mark,
>
> Just thinking some more, as to who actually invokes the threads? Is it
> Tomcat?
They look like Tomcat created threads to me.
Mark
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Re: high CPU usage
Posted by Martin Gainty <mg...@hotmail.com>.
You're requesting a TLS Secure connection
http://java.sun.com/products/jndi/tutorial/ldap/ext/starttls.html
HTH,
Martin
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----- Original Message -----
From: "Gurdeep Kaur (gurdeep)" <gu...@cisco.com>
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Thursday, March 22, 2007 7:18 PM
Subject: RE: high CPU usage
Mark,
Just thinking some more, as to who actually invokes the threads? Is it
Tomcat?
Thanks
Gurdeep
-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org]
Sent: Wednesday, March 21, 2007 7:07 PM
To: Tomcat Users List
Subject: Re: high CPU usage
Gurdeep Kaur (gurdeep) wrote:
> Any pointers, inputs will be greatly appreciated.
The handshake is handled by JSSE / the JDK. This looks like a JSSE / JDK
issue rather than a Tomcat one.
Mark
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RE: high CPU usage
Posted by "Gurdeep Kaur (gurdeep)" <gu...@cisco.com>.
Mark,
Just thinking some more, as to who actually invokes the threads? Is it
Tomcat?
Thanks
Gurdeep
-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org]
Sent: Wednesday, March 21, 2007 7:07 PM
To: Tomcat Users List
Subject: Re: high CPU usage
Gurdeep Kaur (gurdeep) wrote:
> Any pointers, inputs will be greatly appreciated.
The handshake is handled by JSSE / the JDK. This looks like a JSSE / JDK
issue rather than a Tomcat one.
Mark
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Re: high CPU usage
Posted by Mark Thomas <ma...@apache.org>.
Gurdeep Kaur (gurdeep) wrote:
> Any pointers, inputs will be greatly appreciated.
The handshake is handled by JSSE / the JDK. This looks like a JSSE /
JDK issue rather than a Tomcat one.
Mark
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Re: high CPU usage
Posted by Mark Thomas <ma...@apache.org>.
Gurdeep Kaur (gurdeep) wrote:
> I am going to add some more information to the question I asked
> yesterday.
>
> I am running a TLS test case to do a TLS handshake on port 8443 of our
> server that is running Tomcat 5.5.
>
> I noticed in the log file that there are two threads currently running
> on the invocation of this test( there should be just one to handle one
> https request?).
>
> One of them is Printing
> http-8443-Processor1, READ: TLSv1 Handshake, length = and the message
> is repeated thousands and thousand of times thus consuming the CPU.
>
> The other thread seems to look ok. And the difference I find between
> these two is that the thread that works as intended prints :
>
> http-8443-Processor2, READ: TLSv1 Handshake, length =8
>
> Note the non-zero length.
>
> I can constantly reproduce the issue.
>
> Any pointers, inputs will be greatly appreciated.
I know the original message is heading towards three years old for but
for the benefit of the archives this was a JVM bug, not a Tomcat one.
I can reproduce the high CPU usage with Tomcat 5.5.20 and JDK 1.5.0_10.
Updating the JVM to 1.5.0_22 or 1.6.0_17 resolves the issue.
Mark
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Re: How to debug tomcat and JSSE
Posted by Rashmi Rubdi <ra...@gmail.com>.
Set these environment variables:
ANT_HOME - Ant's root folder
CATALINA_HOME - Tomcat's root folder
JAVA_HOME - JDK's root folder
Set
PATH %JAVA_HOME%/bin;%ANT_HOME%/bin;%CATALINA_HOME%/bin
According to Ant's manual , Ant expects JAVA_HOME and some other
system variables to be set.
-Rashmi
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Re: How to debug tomcat and JSSE
Posted by Rashmi Rubdi <ra...@gmail.com>.
tools.jar is available in JDK's lib folder.
There's a RUNNING.txt file in Tomcat's root folder which provides all
details on configuring Tomcat.
Ant's installation http://ant.apache.org/manual/index.html requires
JAVA_HOME
ANT_HOME
-Rashmi
On 3/22/07, Gurdeep Kaur (gurdeep) <gu...@cisco.com> wrote:
> Was looking at building tomcat on apache website and so far I have no
> luck building tomcat. Running ant in tomcat_source folder gives me
> errors that a tools.jar file is expected in java folder.
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How to debug tomcat and JSSE
Posted by "Gurdeep Kaur (gurdeep)" <gu...@cisco.com>.
I am new to this group and the tomcat world, and would like to know if
there is information available as to how to debug tomcat related issues
and JSSE related issues if it is used with tomcat.
Was looking at building tomcat on apache website and so far I have no
luck building tomcat. Running ant in tomcat_source folder gives me
errors that a tools.jar file is expected in java folder.
Thanks
Gurdeep
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high CPU usage
Posted by "Gurdeep Kaur (gurdeep)" <gu...@cisco.com>.
I am going to add some more information to the question I asked
yesterday.
I am running a TLS test case to do a TLS handshake on port 8443 of our
server that is running Tomcat 5.5.
I noticed in the log file that there are two threads currently running
on the invocation of this test( there should be just one to handle one
https request?).
One of them is Printing
http-8443-Processor1, READ: TLSv1 Handshake, length = 0 and the message
is repeated thousands and thousand of times thus consuming the CPU.
The other thread seems to look ok. And the difference I find between
these two is that the thread that works as intended prints :
http-8443-Processor2, READ: TLSv1 Handshake, length = 78
Note the non-zero length.
I can constantly reproduce the issue.
Any pointers, inputs will be greatly appreciated.
Thanks
Gurdeep
-----Original Message-----
From: Gurdeep Kaur (gurdeep)
Sent: Tuesday, March 20, 2007 4:56 PM
To: users@tomcat.apache.org
Subject: high CPU usage with codenomicon TLS test case #91
We are using tomcat 5.5 with JSSE. When we execute codenomicon test case
#91 from the TLS suit, tomcat CPU usage goes up to 90%. The platform is
Redhat Linux.
Was wondering if someone has seen something like this before.
Thanks
Gurdeep
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