Appserver error

Dear all,

while trying to connect to the appserver, sometimes the appserver is responding and for another time the appserver is throwing error. Upon checking the appserver server logs whenever the request fails following is written in the appserver server log file

[18/07/23@12:58:24.674+0300] P-021144 T-004604 3 AS AS CSS_CONN before ACK, connection=10.10.20.122::Cliee::3091::1487d8bdc01693b0:-414f9736:164b88eb5fe:7fde bound=0 changed=0
[18/07/23@12:58:24.674+0300] P-021144 T-004604 4 AS AS css_conn() ret= 0
[18/07/23@12:58:24.675+0300] P-021144 T-004604 4 AS AS Server Message state = MSGSTATE_IDLE
[18/07/23@12:58:24.679+0300] P-030208 T-016520 4 AS AS Server Message state = MSGSTATE_INITRQ
[18/07/23@12:58:24.680+0300] P-030208 T-016520 3 AS AS requestID= <REQ|O4GL-004083>
[18/07/23@12:58:24.680+0300] P-030208 T-016520 4 AS AS -- TRACE: Open4GLWriteLast 3988. (8401)
[18/07/23@12:58:24.680+0300] P-030208 T-016520 4 AS AS -- TRACE: Open4GLWrite 3988. (8402)
[18/07/23@12:58:24.680+0300] P-030208 T-016520 4 AS AS -- TRACE: cso4GL: Before loadProc() (8458)
[18/07/23@12:58:24.680+0300] P-030208 T-016520 3 AS AS -- TRACE: Non-PERSISTENT Procedure 'Progress_net\Root\Resolver.p' START. (5498)
[18/07/23@12:58:24.681+0300] P-030208 T-016520 4 AS AS -- TRACE: cso4GL: loadProc() failed. (8458)
[18/07/23@12:58:24.681+0300] P-030208 T-016520 4 AS AS -- TRACE: Set open 4GL server state to 5. (8400)
[18/07/23@12:58:24.681+0300] P-030208 T-016520 4 AS AS -- TRACE: cso4GL: setErrorState() calling csopenSetStop(). (8458)
[18/07/23@12:58:24.681+0300] P-030208 T-016520 4 AS AS Server Message state = MSGSTATE_SENDRESP
[18/07/23@12:58:24.681+0300] P-030208 T-016520 4 AS AS -- TRACE: Set open 4GL server state to 1. (8400)
[18/07/23@12:58:24.681+0300] P-030208 T-016520 1 AS -- Progress_net\Root\Resolver.p Database mydatabase not connected. (1006)
[18/07/23@12:58:24.681+0300] P-030208 T-016520 4 AS AS -- TRACE: open4GLRead 91. (8403)

Could you please suggest