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An error occurred while logging in - Connection error

  • Hi,
    I have had mango running for about 18 months, log in once a week or so and check the solar data it
    records, and emails me. Last login, I updated, an now a week later, I realise i cannot log in.

    The login screen comes up, but fails with "An error occurred while logging in - Connection error"


    $ uname -a
    Linux mango 4.9.0-12-amd64 #1 SMP Debian 4.9.210-1 (2020-01-20) x86_64 GNU/Linux

    I noticed the java install advice has changed to openjdk, so I upgraded, but no luck.

    $ java --version
    openjdk 14 2020-03-17
    OpenJDK Runtime Environment AdoptOpenJDK (build 14+36)
    OpenJDK 64-Bit Server VM AdoptOpenJDK (build 14+36, mixed mode, sharing)

    ma.log only has INFO data logged
    Starting Mango 3.7.5 with Schema Version: 29

    all the processes seem to be running OK

    $ netstat -antp
    Active Internet connections (servers and established)
    Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
    tcp        0      0    *               LISTEN      454/sshd            
    tcp        0      0 *               LISTEN      422/cupsd           
    tcp        0    196   ESTABLISHED 610/sshd: robert [p 
    tcp6       0      0 :::8080                 :::*                    LISTEN      2125/java           
    tcp6       0      0 :::22                   :::*                    LISTEN      454/sshd            
    tcp6       0      0 ::1:631                 :::*                    LISTEN      422/cupsd           
    tcp6       0      0 :::8443                 :::*                    LISTEN      2125/java           
    tcp6       0      0 :::5502                 :::*                    LISTEN      2125/java           
    tcp6       0      0      ESTABLISHED 2125/java           
    tcp6       0      0     ESTABLISHED 2125/java           
    tcp6       0      0        ESTABLISHED 2125/java           
    tcp6       0      0   TIME_WAIT   -                   
    tcp6       0      0   TIME_WAIT   -

    I think the two "TIME_WAIT" lines are my login attempt.

    Where can I look for errors / logs that might help resolve the issue.


  • Hi All,
    Well its the next morning here in Australia, and I am at home waiting for the corona virus to get me, so I clicked on the link for my mango install, and firefox did the security warning for a self signed certificate again - strange, then
    then the login worked, and up came the screen.
    ![alt text](0_1585524922854_Mango_Screen.png image url)

    Anyway, any thoughts on what magic happened overnight ?


  • Check your ma.logs, if this thing is internet facing someone may have been hammering it causing the login to drop out in relation to max non-authenticated attempts being tripped..