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Posted to users@tomcat.apache.org by Dustin Delage <dd...@sagecomputing.com> on 2016/10/26 17:07:32 UTC
Tomcat 9 exe, High CPU usage due to TCP I/O with itself
Tomcat 9, running on Windows Server 2008, runs the CPU at 79% - 90%
continuously. The only activity is tomcat spamming itself with TCP
traffic. Same proc ID, out one port, to another port back to itself.
A small sample from Process Monitor:
##########################################################################
##########################################################################
##################
10:16:04.7458125 AM Tomcat9.exe 1932 TCP Receive
7f00:1::d880:fe03:80fa:ffff:49199 ->
7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49198 SUCCESS Length: 1, seqnum:
0, connid: 0
10:16:04.7458374 AM Tomcat9.exe 1932 TCP Send
Sage-Web03.sage.local:49198 -> Sage-Web03.sage.local:49199 SUCCESS
Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
10:16:04.7458805 AM Tomcat9.exe 1932 TCP Receive
7f00:1::d880:fe03:80fa:ffff:49197 ->
7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, seqnum:
0, connid: 0
10:16:04.7458972 AM Tomcat9.exe 1932 TCP Send
Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 SUCCESS
Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
10:16:04.7459244 AM Tomcat9.exe 1932 TCP Receive
7f00:1::d880:fe03:80fa:ffff:49197 ->
7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, seqnum:
0, connid: 0
10:16:04.7459507 AM Tomcat9.exe 1932 TCP Send
Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 SUCCESS
Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
##########################################################################
##########################################################################
###################
Attaching an image of my findings as well
Thank You,
D Delage
RE: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Christopher Schultz [mailto:chris@christopherschultz.net]
> Subject: Re: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
> On 10/27/16 1:45 PM, Dustin Delage wrote:
> > Looks like the app is now slated for redevelopment. Thanks
> > everyone.
> I still think this has nothing to do with your application...
Maybe, maybe not. On a fresh install of Tomcat 9.0.0.M11 using JDK 1.8.0_102 running as a service on Windows 7 Pro, I see the following ports in use:
Protocol Local Address Remote Address State
TCP <dns-name>:8009 <dns-name>:0 LISTENING
TCP <dns-name>:8080 <dns-name>:0 LISTENING
TCP <dns-name>:8005 <dns-name>:0 LISTENING
TCP <dns-name>:55089 <dns-name>:55090 ESTABLISHED
TCP <dns-name>:55090 <dns-name>:55089 ESTABLISHED
TCP <dns-name>:55091 <dns-name>:55092 ESTABLISHED
TCP <dns-name>:55092 <dns-name>:55091 ESTABLISHED
TCP <dns-name>:55093 <dns-name>:55094 ESTABLISHED
TCP <dns-name>:55094 <dns-name>:55093 ESTABLISHED
TCP <dns-name>:55095 <dns-name>:55096 ESTABLISHED
TCP <dns-name>:55096 <dns-name>:55095 ESTABLISHED
TCP <dns-name>:55097 <dns-name>:55098 ESTABLISHED
TCP <dns-name>:55098 <dns-name>:55097 ESTABLISHED
TCP <dns-name>:55099 <dns-name>:55100 ESTABLISHED
TCP <dns-name>:55100 <dns-name>:55099 ESTABLISHED
TCPV6 <dns-name>:8009 <dns-name>:0 LISTENING
TCPV6 <dns-name>:8080 <dns-name>:0 LISTENING
I haven't figured out what all the paired ports with established connections are used for yet; maybe stdin, stdout, stderr, and ?? If some of the ports are redirects of stdout and/or stderr, the webapp could be dumping a lot of junk there, causing the high CPU usage.
- Chuck
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Re: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Dustin,
On 10/27/16 1:45 PM, Dustin Delage wrote:
> Looks like the app is now slated for redevelopment. Thanks
> everyone.
I still think this has nothing to do with your application...
- -chris
> -----Original Message----- From: Mark Thomas
> [mailto:markt@apache.org] Sent: Thursday, October 27, 2016 4:48 AM
> To: Tomcat Users List <us...@tomcat.apache.org> Subject: Re: Tomcat
> 9 exe, High CPU usage due to TCP I/O with itself
>
> On 26/10/2016 18:07, Dustin Delage wrote:
>> Tomcat 9, running on Windows Server 2008, runs the CPU at 79% -
>> 90% continuously. The only activity is tomcat spamming itself
>> with TCP traffic. Same proc ID, out one port, to another port
>> back to itself.
>
> Tomcat doesn't do that. That looks more likely to be an app issue.
>
> A series of thread dumps (3 thread dumps, 10 seconds apart) should
> provide some pointers as to what is going on. A profiler (e.g.
> YourKit) would be better.
>
> Mark
>
>>
>> A small sample from Process Monitor:
>>
>> #####################################################################
#
>>
>>
####
>> #####################################################################
#
>>
>>
####
>> ################## 10:16:04.7458125 AM Tomcat9.exe 1932 TCP
>> Receive 7f00:1::d880:fe03:80fa:ffff:49199 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49198 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7458374 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49198 -> Sage-Web03.sage.local:49199
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0 10:16:04.7458805 AM Tomcat9.exe 1932 TCP Receive
>> 7f00:1::d880:fe03:80fa:ffff:49197 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7458972 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0 10:16:04.7459244 AM Tomcat9.exe 1932 TCP Receive
>> 7f00:1::d880:fe03:80fa:ffff:49197 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7459507 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0
>> #####################################################################
#
>>
>>
####
>> #####################################################################
#
>>
>>
####
>> ###################
>>
>> Attaching an image of my findings as well
>>
>> Thank You,
>>
>> D Delage
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>>
>>
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>
>
> ---------------------------------------------------------------------
>
>
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
> ---------------------------------------------------------------------
>
>
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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RE: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
Posted by Dustin Delage <dd...@sagecomputing.com>.
Looks like the app is now slated for redevelopment. Thanks everyone.
-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org]
Sent: Thursday, October 27, 2016 4:48 AM
To: Tomcat Users List <us...@tomcat.apache.org>
Subject: Re: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
On 26/10/2016 18:07, Dustin Delage wrote:
> Tomcat 9, running on Windows Server 2008, runs the CPU at 79% - 90%
> continuously. The only activity is tomcat spamming itself with TCP
> traffic. Same proc ID, out one port, to another port back to itself.
Tomcat doesn't do that. That looks more likely to be an app issue.
A series of thread dumps (3 thread dumps, 10 seconds apart) should provide
some pointers as to what is going on. A profiler (e.g. YourKit) would be
better.
Mark
>
> A small sample from Process Monitor:
>
> ######################################################################
> ####
> ######################################################################
> ####
> ##################
> 10:16:04.7458125 AM Tomcat9.exe 1932 TCP Receive
> 7f00:1::d880:fe03:80fa:ffff:49199 ->
> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49198 SUCCESS Length: 1, seqnum:
> 0, connid: 0
> 10:16:04.7458374 AM Tomcat9.exe 1932 TCP Send
> Sage-Web03.sage.local:49198 -> Sage-Web03.sage.local:49199 SUCCESS
> Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
> 10:16:04.7458805 AM Tomcat9.exe 1932 TCP Receive
> 7f00:1::d880:fe03:80fa:ffff:49197 ->
> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, seqnum:
> 0, connid: 0
> 10:16:04.7458972 AM Tomcat9.exe 1932 TCP Send
> Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 SUCCESS
> Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
> 10:16:04.7459244 AM Tomcat9.exe 1932 TCP Receive
> 7f00:1::d880:fe03:80fa:ffff:49197 ->
> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, seqnum:
> 0, connid: 0
> 10:16:04.7459507 AM Tomcat9.exe 1932 TCP Send
> Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 SUCCESS
> Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
> ######################################################################
> ####
> ######################################################################
> ####
> ###################
>
> Attaching an image of my findings as well
>
> Thank You,
>
> D Delage
>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
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RE: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
Posted by Dustin Delage <dd...@sagecomputing.com>.
Unfortunately my knowledge of Tomcat and Java apps is limited to basic sys
admin stuff. I've made the suggestion to the developer to Profile the app.
I'm sure this will reveal the problem. I might make an attempt as well.
-----Original Message-----
From: Christopher Schultz [mailto:chris@christopherschultz.net]
Sent: Thursday, October 27, 2016 12:03 PM
To: Tomcat Users List <us...@tomcat.apache.org>
Subject: Re: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Mark,
On 10/27/16 4:47 AM, Mark Thomas wrote:
> On 26/10/2016 18:07, Dustin Delage wrote:
>> Tomcat 9, running on Windows Server 2008, runs the CPU at 79% - 90%
>> continuously. The only activity is tomcat spamming itself with TCP
>> traffic. Same proc ID, out one port, to another port back to itself.
>
> Tomcat doesn't do that. That looks more likely to be an app issue.
>
> A series of thread dumps (3 thread dumps, 10 seconds apart) should
> provide some pointers as to what is going on. A profiler (e.g.
> YourKit) would be better.
Tomcat9.exe should be the monitor (procrun), not anything hosting an
application, right?
- -chris
>> A small sample from Process Monitor:
>>
>> #####################################################################
#####
>>
>>
########################################################################
##
>> ################## 10:16:04.7458125 AM Tomcat9.exe 1932 TCP
>> Receive 7f00:1::d880:fe03:80fa:ffff:49199 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49198 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7458374 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49198 -> Sage-Web03.sage.local:49199
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0 10:16:04.7458805 AM Tomcat9.exe 1932 TCP Receive
>> 7f00:1::d880:fe03:80fa:ffff:49197 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7458972 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0 10:16:04.7459244 AM Tomcat9.exe 1932 TCP Receive
>> 7f00:1::d880:fe03:80fa:ffff:49197 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7459507 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0
>> #####################################################################
#####
>>
>>
########################################################################
##
>> ###################
>>
>> Attaching an image of my findings as well
>>
>> Thank You,
>>
>> D Delage
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>>
>>
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>
>
> ---------------------------------------------------------------------
>
>
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
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Re: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Mark,
On 10/27/16 4:47 AM, Mark Thomas wrote:
> On 26/10/2016 18:07, Dustin Delage wrote:
>> Tomcat 9, running on Windows Server 2008, runs the CPU at 79% -
>> 90% continuously. The only activity is tomcat spamming itself
>> with TCP traffic. Same proc ID, out one port, to another port
>> back to itself.
>
> Tomcat doesn't do that. That looks more likely to be an app issue.
>
> A series of thread dumps (3 thread dumps, 10 seconds apart) should
> provide some pointers as to what is going on. A profiler (e.g.
> YourKit) would be better.
Tomcat9.exe should be the monitor (procrun), not anything hosting an
application, right?
- -chris
>> A small sample from Process Monitor:
>>
>> #####################################################################
#####
>>
>>
########################################################################
##
>> ################## 10:16:04.7458125 AM Tomcat9.exe 1932 TCP
>> Receive 7f00:1::d880:fe03:80fa:ffff:49199 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49198 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7458374 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49198 -> Sage-Web03.sage.local:49199
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0 10:16:04.7458805 AM Tomcat9.exe 1932 TCP Receive
>> 7f00:1::d880:fe03:80fa:ffff:49197 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7458972 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0 10:16:04.7459244 AM Tomcat9.exe 1932 TCP Receive
>> 7f00:1::d880:fe03:80fa:ffff:49197 ->
>> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1,
>> seqnum: 0, connid: 0 10:16:04.7459507 AM Tomcat9.exe 1932 TCP
>> Send Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197
>> SUCCESS Length: 1, startime: 12341635, endtime: 12341635, seqnum:
>> 0, connid: 0
>> #####################################################################
#####
>>
>>
########################################################################
##
>> ###################
>>
>> Attaching an image of my findings as well
>>
>> Thank You,
>>
>> D Delage
>>
>>
>>
>>
>> ---------------------------------------------------------------------
>>
>>
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>
>
> ---------------------------------------------------------------------
>
>
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
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Re: Tomcat 9 exe, High CPU usage due to TCP I/O with itself
Posted by Mark Thomas <ma...@apache.org>.
On 26/10/2016 18:07, Dustin Delage wrote:
> Tomcat 9, running on Windows Server 2008, runs the CPU at 79% - 90%
> continuously. The only activity is tomcat spamming itself with TCP
> traffic. Same proc ID, out one port, to another port back to itself.
Tomcat doesn't do that. That looks more likely to be an app issue.
A series of thread dumps (3 thread dumps, 10 seconds apart) should
provide some pointers as to what is going on. A profiler (e.g. YourKit)
would be better.
Mark
>
> A small sample from Process Monitor:
>
> ##########################################################################
> ##########################################################################
> ##################
> 10:16:04.7458125 AM Tomcat9.exe 1932 TCP Receive
> 7f00:1::d880:fe03:80fa:ffff:49199 ->
> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49198 SUCCESS Length: 1, seqnum:
> 0, connid: 0
> 10:16:04.7458374 AM Tomcat9.exe 1932 TCP Send
> Sage-Web03.sage.local:49198 -> Sage-Web03.sage.local:49199 SUCCESS
> Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
> 10:16:04.7458805 AM Tomcat9.exe 1932 TCP Receive
> 7f00:1::d880:fe03:80fa:ffff:49197 ->
> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, seqnum:
> 0, connid: 0
> 10:16:04.7458972 AM Tomcat9.exe 1932 TCP Send
> Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 SUCCESS
> Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
> 10:16:04.7459244 AM Tomcat9.exe 1932 TCP Receive
> 7f00:1::d880:fe03:80fa:ffff:49197 ->
> 7f00:1:ffff:ffff:ffff:ffff:ffff:ffff:49196 SUCCESS Length: 1, seqnum:
> 0, connid: 0
> 10:16:04.7459507 AM Tomcat9.exe 1932 TCP Send
> Sage-Web03.sage.local:49196 -> Sage-Web03.sage.local:49197 SUCCESS
> Length: 1, startime: 12341635, endtime: 12341635, seqnum: 0, connid: 0
> ##########################################################################
> ##########################################################################
> ###################
>
> Attaching an image of my findings as well
>
> Thank You,
>
> D Delage
>
>
>
>
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