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Tomcat Server Restarting

Discussion in 'General Discussion' started by seby, Jul 2, 2011.

  1. seby

    seby Well-Known Member

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    Hi,

    Tomcat server getting restart frequently. Whenever it happens, we are getting Cpanel notification emails(4-5 mail per hour) as follows.

    I went through catalina logs and there is no crashes since June 17th.

    Anyone know how to fix this ?

    Thanks
     
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    #1 seby, Jul 2, 2011
    Last edited: Jul 2, 2011
  2. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Is there any service besides tomcat running on the machine? Can you please ps aux the services?

    Code:
    ps aux | grep tomcat
    I've seen instances where someone had a process such as a cron named with the same name as the service and chkservd was improperly detecting that cron rather than the actual tomcat process(es).
     
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  3. seby

    seby Well-Known Member

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    Thanks for your reply.

     
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  4. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    I'm not seeing anything wrong with those processes to indicate any additional one running something else that is being detected. Do you have anything in the cron logs for tomcat?

    Code:
    grep -i tomcat /var/log/cron
     
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  5. seby

    seby Well-Known Member

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    /usr/local/jakarta/tomcat/logs/catalina.err shows

     
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  6. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    Do you have anything like prm or another service killer on the machine?

    If not, do you have a firewall and is port 8080 opened? Try telnetting to localhost on port 8080 to see the results on the machine:

    Code:
    telnet localhost 8080
    You should see something like the following:

    Code:
    root@host [~]# telnet localhost 8080
    Trying 127.0.0.1...
    Connected to localhost.
    Escape character is '^]'.
    Then at the prompt, enter the "quit" command and it should show something like this:

    Code:
    HTTP/1.1 400 Bad Request
    Server: Apache-Coyote/1.1
    Date: Wed, 06 Jul 2011 02:24:28 GMT
    Connection: close
    
    Connection closed by foreign host.
    Finally, just to be clear, you aren't using Tomcat in conjunction with nginx or litespeed rather than Apache on a machine?
     
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  7. seby

    seby Well-Known Member

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    Hi,

    We have installed csf on this server.

    It seems Port 8080 is opened in firewal configuration TCP_IN and TCP_OUT.


    Tomcat is not down all the time. After a certain period of time (no constant at all, can be between an hour or two) Tomcat will go down.

    Thanks,
     
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  8. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    At this point, could you try to open up a ticket for us to see if we can find any further details? There would also be another log you might review at /usr/local/apache/logs/mod_jk.log location.
     
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  9. furquan

    furquan Well-Known Member

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    Tristan,

    I have a similar issue and i have also posted a ticket on the support portal with ticket id 1911577.

    I also have an open thread on this board, with no response yet :- http://forums.cpanel.net/f5/tomcat-stops-every-few-min-236221.html

    I have the same issue, But when i stop CSF every thing returns to normal and tomcat works just fine.

    But i cannot figure out what could CSF be doing with tomcat.....

    Any help on this ?
     
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  10. cPanelTristan

    cPanelTristan Quality Assurance Analyst
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    What were the results of the ticket? I see we asked a question about whether port 8080 was opened in CSF/LFD, but we did not receive a response back. Please note that it helps substantially to receive a response back on the results of a suggested resolution.
     
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