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Posted to users@tomcat.apache.org by jennifer zhou <je...@gmail.com> on 2015/09/19 02:20:14 UTC
soap web service (axis based) on tomcat 8
Hi,
Our app was running well on Tomcat 7 on linux. Recently we migrated to
Tomcat 8 on linux. However we found the system CPU usage is higher than
normal. When there is no any user interaction, we still see about 25% of
the system CPU usage. After deep dive, we found the tomcat keeps scanning
our app's class path under WEB-INF folder. Actually all our artifacts are
packed within WEB-INF/lib folder, there is nothing within WEB-INF/classes
folder. Is there any way to look for WEB-INF/lib folder first before
looking for artifacts within WEB-INF/classes folder?
Also why does Tomcat keeps scanning our app classpath during app idle time?
Is there anyway to turn this off?
The detailed information is shown as below for your references.
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/com",
0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
{st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
7196
lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/com",
0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
Thanks,
Jennifer
Re: soap web service (axis based) on tomcat 8
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
André,
On 9/19/15 10:00 AM, André Warnier (tomcat) wrote:
> On 19.09.2015 02:20, jennifer zhou wrote:
>> Hi,
>>
>> Our app was running well on Tomcat 7 on linux. Recently we
>> migrated to Tomcat 8 on linux. However we found the system CPU
>> usage is higher than normal. When there is no any user
>> interaction, we still see about 25% of the system CPU usage.
>> After deep dive, we found the tomcat keeps scanning our app's
>> class path under WEB-INF folder. Actually all our artifacts are
>> packed within WEB-INF/lib folder, there is nothing within
>> WEB-INF/classes folder. Is there any way to look for WEB-INF/lib
>> folder first before looking for artifacts within WEB-INF/classes
>> folder?
>>
>> Also why does Tomcat keeps scanning our app classpath during app
>> idle time? Is there anyway to turn this off?
>
> Quick pointer :
> http://tomcat.apache.org/tomcat-8.0-doc/config/host.html#Standard_Impl
ementation
>
> See "autoDeploy" (default is true)
>
> If you set this to "false", does the same still happen ?
A good guess, but scanning for updated files doesn't usually take much
in the way of CPU.
It also might be Axis scanning for something. I find it odd that
Tomcat would look for WEB-INF/classes/org specifically and not
anything else.
Best thing to do is get a thread dump while the CPU is being used to
find out what exactly is doing that.
- -chris
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Re: soap web service (axis based) on tomcat 8
Posted by "André Warnier (tomcat)" <aw...@ice-sa.com>.
On 19.09.2015 02:20, jennifer zhou wrote:
> Hi,
>
> Our app was running well on Tomcat 7 on linux. Recently we migrated to
> Tomcat 8 on linux. However we found the system CPU usage is higher than
> normal. When there is no any user interaction, we still see about 25% of
> the system CPU usage. After deep dive, we found the tomcat keeps scanning
> our app's class path under WEB-INF folder. Actually all our artifacts are
> packed within WEB-INF/lib folder, there is nothing within WEB-INF/classes
> folder. Is there any way to look for WEB-INF/lib folder first before
> looking for artifacts within WEB-INF/classes folder?
>
> Also why does Tomcat keeps scanning our app classpath during app idle time?
> Is there anyway to turn this off?
Quick pointer :
http://tomcat.apache.org/tomcat-8.0-doc/config/host.html#Standard_Implementation
See "autoDeploy" (default is true)
If you set this to "false", does the same still happen ?
>
> The detailed information is shown as below for your references.
>
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
> 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
> st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
> 0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
> 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
> st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
> 0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
> 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
> st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
> 0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
> 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
> st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/org",
> 0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
> 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
> st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
> 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
> st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/com",
> 0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin", {st_mode=S_IFDIR|0700, st_size=4096, ...}) =
> 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24", {st_mode=S_IFDIR|0700,
> st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196 lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes",
> {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0
> 7196
> lstat("/home/jgu-admin/apache-tomcat-8.0.24/webapps/IDManager/WEB-INF/classes/com",
> 0x2b9a564eb2b0) = -1 ENOENT (No such file or directory)
> 7196 lstat("/home", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
>
> Thanks,
> Jennifer
>
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