tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jerry Malcolm <techst...@malcolms.com>
Subject Re: Massive Startup Time after Server Reboot
Date Tue, 21 May 2019 17:25:06 GMT
Update.... I totally disabled Windows Real Time Virus protection.  
Apparently it was 'one' of the problems.  However...

Original startup after reboot (with WIndows Real Time Virus scan) -- ~21 
minutes

With Windows Real Time Virus scan totally disabled immediately after 
reboot -- ~3 minutes

Second TC startup -- ~35 seconds.

3 minutes beats 21 minutes, and I guess I can live with it.  But there's 
still something else slowing it down on the first startup after system 
reboot.   I'll see about getting some stack dumps.

Thanks for the help.

Jerry


On 5/21/2019 9:55 AM, Christopher Schultz wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> Jerry,
>
> On 5/20/19 14:05, Jerry Malcolm wrote:
>> Andre,
>>
>> Your theory sounds like a real possibility.  It would explain why
>> it only blows up the first time after a reboot.  I'll test the
>> theory tonight during off-peak use hours for the web sites I host.
> If André's theory is correct, you will probably find that 2-3 months
> ago the version of your virus scanner was upgraded, and all of the
> whitelisted applications (like Tomcat) were lost.
>
> If that's the case, you can probably re-whitelist Tomcat and get your
> performance back. At least until the next upgrade.
>
> - -chris
>
>> On 5/20/2019 3:43 AM, André Warnier (tomcat) wrote:
>>> On 20.05.2019 00:09, Jerry Malcolm wrote:
>>>> Just an FYI.... this server has been in production a little
>>>> over a year.  This TC load problem only started 2-3 months ago.
>>>> So 'something' changed to cause this problem to manifest
>>>> itself. It's been too long to try to correlate a specific
>>>> server change to the start of this problem. But I just wanted
>>>> to point out that this problem has NOT been around since day 1
>>>> on this server.
>>> Just in case, since this is a Windows server .. 2-3 months ago,
>>> an update of a virus scanner ? (of the intrusive kind which
>>> pre-checks each file that wants to be opened) Checking may be
>>> easy or not, depending on your access : disable the virus scanner
>>> just the time to start tomcat and check.
>>>
>>>> Jerry
>>>>
>>>> On 5/19/2019 5:03 PM, Jerry Malcolm wrote:
>>>>> Rainer,
>>>>>
>>>>> No change with the urandom parm.  I am attaching a portion of
>>>>> the Catalina log.  The first half shows between 8 and 15
>>>>> seconds to deploy each app for a single virtual host (there
>>>>> are no war files, the app is already exploded in the appbase
>>>>> dir).  I have quite a few virtual hosts with several apps
>>>>> each.  That initial server start took 21+ minutes. I then
>>>>> restarted the TC service and got the ~.5 sec start per webapp
>>>>> shown in the 2nd half of the log below.
>>>>>
>>>>> Can you refresh me on how to capture the stack dumps you
>>>>> suggested? It's been a while....
>>>>>
>>>>> Thx.
>>>>>
>>>>> Jerry
>>>>>
>>>>> First start of Tomcat after server reboot
>>>>> -------------------------------------------------------------------
> - --
>>>>>
> [C:\domains\<myDomain>.com\webapps\JSPWiki.war] has finished in
>>>>> [8,579] ms tory [C:\domains\<myDomain>.com\webapps\cis]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\cis] has finished
>>>>> in [11,486] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\gallery] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\gallery] has finished in
>>>>> [9,204] ms tory [C:\domains\<myDomain>.com\webapps\gl]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\gl] has finished
>>>>> in [8,469] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\idmanager] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\idmanager] has finished in
>>>>> [8,689] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\itemtrack] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\itemtrack] has finished in
>>>>> [6,907] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\malcolment] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\malcolment] has finished
>>>>> in [8,469] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\notebook] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\notebook] has finished in
>>>>> [10,189] ms tory [C:\domains\<myDomain>.com\webapps\order]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\order] has
>>>>> finished in [8,501] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\payment] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\payment] has finished in
>>>>> [14,209] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\projectmanager] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\projectmanager] has
>>>>> finished in [9,018] ms [C:\Tomcat
>>>>> 9.0\conf\Catalina\myridetx.net\manager.xml] ptor [C:\Tomcat
>>>>> 9.0\conf\Catalina\myridetx.net\manager.xml] has finished in
>>>>> [62] ms
>>>>>
>>>>> Restart of Tomcat
>>>>> -------------------------------------------------------------------
> - --
>>>>>
> tory [C:\domains\<myDomain>.com\webapps\cis]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\cis] has finished
>>>>> in [594] ms tory [C:\domains\<myDomain>.com\webapps\gallery]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\gallery] has
>>>>> finished in [547] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\gl] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\gl] has finished in [562]
>>>>> ms tory [C:\domains\<myDomain>.com\webapps\idmanager]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\idmanager] has
>>>>> finished in [578] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\itemtrack] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\itemtrack] has finished in
>>>>> [547] ms tory [C:\domains\<myDomain>.com\webapps\malcolment]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\malcolment] has
>>>>> finished in [579] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\notebook] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\notebook] has finished in
>>>>> [547] ms tory [C:\domains\<myDomain>.com\webapps\order]
>>>>> irectory [C:\domains\<myDomain>.com\webapps\order] has
>>>>> finished in [531] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\payment] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\payment] has finished in
>>>>> [562] ms tory
>>>>> [C:\domains\<myDomain>.com\webapps\projectmanager] irectory
>>>>> [C:\domains\<myDomain>.com\webapps\projectmanager] has
>>>>> finished in [531] ms
>>>>>
>>>>> On 5/18/2019 3:18 PM, Rainer Jung wrote:
>>>>>> Most likely it hangs waiting for enough entropy for random
>>>>>> number generator seeding.
>>>>>>
>>>>>> Try whether the problem goes away if you add
>>>>>>
>>>>>> -Djava.security.egd=file:/dev/urandom
>>>>>>
>>>>>> to you process flags. If you are using older Java than Java
>>>>>> 8 (not possible for Tomcat 9 but just in case you also have
>>>>>> older software stacks running), then it would be
>>>>>>
>>>>>> -Djava.security.egd=file:/dev/./urandom
>>>>>>
>>>>>> The cryptic /./ is not a typo, you would need it for Java
>>>>>> before Java 8.
>>>>>>
>>>>>> If this doesn't help, then you should try capturing a few
>>>>>> stack dumps (thread dumps) during the long startup time.
>>>>>> People here can help interpret them.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Rainer
>>>>>>
>>>>>> Am 18.05.2019 um 21:55 schrieb Jerry Malcolm:
>>>>>>> This is a weird one.  It started a few months ago.   I
>>>>>>> have TC 9 running on Windows Server 16.  After I reboot
>>>>>>> the entire server, Tomcat takes forever on startup. It
>>>>>>> normally starts in about 30 seconds.  But after a server
>>>>>>> reboot it takes up to 15 minutes... chugging along at a
>>>>>>> snail's pace starting up all of the apps on all of the
>>>>>>> virtual hosts.  It always finally gets there with
>>>>>>> everything successfully running. Other servers on the
>>>>>>> same box (Apache, JAMES, ISC BIND, MySQL) don't have any
>>>>>>> problem starting up. CPU, Disk, Memory, etc. usages are
>>>>>>> barely showing on the performance graphs. There's nothing
>>>>>>> in the Catalina log or system.err other than showing a
>>>>>>> couple of minute gap in the time stamp between each app
>>>>>>> as it starts up. If I need to reboot again later, it
>>>>>>> boots again in about 30 sec as expected.
>>>>>>>
>>>>>>> First question... any ideas off the top of your head that
>>>>>>> might be causing this?
>>>>>>>
>>>>>>> Second question... is there any other logging I can turn
>>>>>>> on that might explain what TC is blocking on?
>>>>>>>
>>>>>>> Thanks.
>>>>>>>
>>>>>>> Jerry
>>>>>> ------------------------------------------------------------------
> - ---
>>>>>>
> 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
>>>> 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
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
> -----BEGIN PGP SIGNATURE-----
> Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/
>
> iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAlzkEWoACgkQHPApP6U8
> pFinLRAAttjrmJnG6lwB3pd7kT5IpBk5H/MwJdXvEX8/S/k6MLLgWqWmqQhgRQAZ
> UeVqJFJFDCrgXymxXNI2f7k3saVA+2Lxafjuft9WQGKs+mTSQR0s82VG6Iko5JzL
> dZxA5XD+SSU6PafTMQ1hmlVMMDeug+ONqMcUY2XFoZSV6TUk6KqjMiod74We7/b8
> 7PSqI4VWSS6fA4/ZoPJNRvGLXtYDu1obVX3YysMb4tSky/5OenJX6rz0mwMenY0z
> F2p2G2ObNlLKUq7DuAhBcLHB4lbkEv+20Zv6hqMGPlFB8rjiOpUpL86/gfdJY29z
> KGgWLAw1M4rw2n0GjVihcfYfjVBA931wWwkaXpa6cXCrcyjOcgCH+OlhIqjtoHkW
> w6mM9m99LqrWRwqqfiHDDxqywdqukfGANwi1QvaPgVkd0+FwGkinh5G3P9au3cLs
> JKdpGgEog1hJnjkkXWwROlozKiKjMD82V474E4mwjw7nqPI/YXXL5E8VTlhm11JB
> OWDZ8yNgwA//Aw7JbGdAUPqRSsSqrKIyGYr4voDd6nhs+83R/7z27IyIxgw/kzFU
> 6xRFOorztK5dOR5TqPZYB67qUL39++fpdayTYDs7f5Y8guajOsWgVTrvWo3bxCkg
> CxUE7V91tWJYJKlxgbFZyZp4vvSzabf4dq5fxKhPTkYH9pmHhCs=
> =z1un
> -----END PGP SIGNATURE-----
>
> ---------------------------------------------------------------------
> 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


Mime
View raw message