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
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